US20060168013A1 - Message management facility for an industrial process control environment - Google Patents

Message management facility for an industrial process control environment Download PDF

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Publication number
US20060168013A1
US20060168013A1 US10/998,202 US99820204A US2006168013A1 US 20060168013 A1 US20060168013 A1 US 20060168013A1 US 99820204 A US99820204 A US 99820204A US 2006168013 A1 US2006168013 A1 US 2006168013A1
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United States
Prior art keywords
message
messages
alarm
management facility
command
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US10/998,202
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English (en)
Inventor
Irvine Wilson
Markus Paul
Ewald Weiss
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Schneider Electric Systems USA Inc
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Invensys Systems Inc
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Priority to US10/998,202 priority Critical patent/US20060168013A1/en
Priority to CN2005800462866A priority patent/CN101128812B/zh
Priority to PCT/US2005/042491 priority patent/WO2006058090A2/en
Priority to EP05852079A priority patent/EP1836594A4/de
Assigned to INVENSYS SYSTEMS, INC. reassignment INVENSYS SYSTEMS, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: WILSON, IRVINE WILLIAM, PAUL, MARKUS STEPHAN, WEISS, EWALD GERHARD
Assigned to DEUTSCHE BANK AG, LONDON BRANCH reassignment DEUTSCHE BANK AG, LONDON BRANCH SECURITY AGREEMENT Assignors: INVENSYS SYSTEMS, INC.
Publication of US20060168013A1 publication Critical patent/US20060168013A1/en
Priority to US13/932,680 priority patent/US9560109B2/en
Assigned to INVENSYS SYSTEMS, INC. reassignment INVENSYS SYSTEMS, INC. RELEASE BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: DEUTSCHE BANK AG, LONDON BRANCH
Abandoned legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/02—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP]
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
    • G05B19/4184—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by fault tolerance, reliability of production system
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B23/00—Testing or monitoring of control systems or parts thereof
    • G05B23/02—Electric testing or monitoring
    • G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
    • G05B23/0259—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterized by the response to fault detection
    • G05B23/0267—Fault communication, e.g. human machine interface [HMI]
    • G05B23/027—Alarm generation, e.g. communication protocol; Forms of alarm
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F9/00—Arrangements for program control, e.g. control units
    • G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
    • G06F9/46—Multiprogramming arrangements
    • G06F9/54—Interprogram communication
    • G06F9/546—Message passing systems or structures, e.g. queues
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/16—Arrangements for providing special services to substations
    • H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
    • H04L12/1895—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast for short real-time information, e.g. alarms, notifications, alerts, updates
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/31—From computer integrated manufacturing till monitoring
    • G05B2219/31438—Priority, queue of alarms
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]

Definitions

  • the present invention generally relates to the field of networked computerized process control systems. More particularly, the present invention relates to supervisory process control and manufacturing information systems. Such systems generally execute above a control layer in a process control system to provide guidance to lower level control elements such as, by way of example, programmable logic controllers.
  • Data acquisition begins when a number of sensors measure aspects of an industrial process and periodically report their measurements back to a data collection and control system.
  • Such measurements come in a wide variety of forms.
  • the measurements produced by a sensor/recorder include: a temperature, a pressure, a pH, a mass/volume flow of material, a tallied inventory of packages waiting in a shipping line, or a photograph of a room in a factory.
  • a sensor/recorder include: a temperature, a pressure, a pH, a mass/volume flow of material, a tallied inventory of packages waiting in a shipping line, or a photograph of a room in a factory.
  • process management and control software examines the incoming data, produces status reports, and, in many cases, responds by sending commands to actuators/controllers that adjust the operation of at least a portion of the industrial process.
  • the data produced by the sensors also allow an operator to perform a number of supervisory tasks including: tailor the process (e.g., specify new set points) in response to varying external conditions (including costs of raw materials), detect an inefficient/non-optimal operating condition and/or impending equipment failure, and take remedial actions such as move equipment into and out of service as required.
  • tailor the process e.g., specify new set points
  • external conditions including costs of raw materials
  • detect an inefficient/non-optimal operating condition and/or impending equipment failure and take remedial actions such as move equipment into and out of service as required.
  • Typical industrial processes are extremely complex and receive substantially greater volumes of information than any human could possibly digest in its raw form.
  • sensors and control elements e.g., valve actuators
  • These sensors are of varied type and report on varied characteristics of the process. Their outputs are similarly varied in the meaning of their measurements, in the amount of data sent for each measurement, and in the frequency of their measurements. As regards the latter, for accuracy and to enable quick response, some of these sensors/control elements take one or more measurements every second. When multiplied by thousands of sensors/control elements, this results in so much data flowing into the process control system that sophisticated data management and process visualization techniques are required.
  • Highly advanced human-machine interface/process visualization systems exist today that are linked to data sources such as the above-described sensors and controllers. Such systems acquire and digest (e.g., filter) the process data described above.
  • the digested process data in-turn drives a graphical display rendered by a human machine interface.
  • Such data includes mode changes, events, and alarm messages rendered by process controllers in response to a variety of detected process conditions/circumstances.
  • Process alarm messages are traditionally sent from plant control processors to alarm displays on workstations to notify operators of plant upsets.
  • alarm messages are issued by control processors when a measured or calculated value is rendered outside a pre-configured range.
  • the plant controller transmits the generated alarm to one or more operator workstations coupled to a separate (e.g., application) network. Detection, generation and transmission of alarms can potentially place a heavy load on a controller.
  • Known process control systems support a variety of alarm ordering techniques including assigning alarm priorities and filtering alarm messages according any of a variety of characteristics.
  • the alarm prioritization/filtering functionality carried out by the control processor assists operators in assessing plant/process status and facilitates expedited correction of problems as they arise in a plant process.
  • the alarm priorities are relatively fixed and are changed through human intervention. Prioritizing alarms/messages alone will not avoid overwhelming an operator with a shower of alarm messages during a major plant failure or succession of cascading process/plant component failures. Overlooking a particular alarm or class of alarms, during an alarm shower can lead to harm to both humans and the plant itself.
  • the present invention provides a method and facility for managing messages, for example alarms, that pass from control processors to a variety of destinations (e.g., workstations, printers, historians/databases) associated with supervisory control of an industrial process.
  • Managing messages is carried out by interposing appropriate management functionality between sources of messages (e.g., control processors) and the message's final destinations. Such arrangement facilitates executing a variety of functions on the message stream.
  • a message management facility routes a stream of messages received from the control processor to a set of supervisory destinations.
  • the facility includes a message receiver for receiving a message including a message group ID field.
  • the facility also includes message routing information comprising a set of message routing entries. Each of such routing entries includes a message group ID value, and a set of message routing destinations for received messages specifying the message group ID.
  • the facility also includes a destination server for transmitting the message received by the message receiver to one or more network destinations based on an ID specified in the message group ID field and a set of message routing destinations specified in a corresponding routing entry of the message routing information.
  • the facility also carries out a message monitor role wherein the facility monitors a stream of messages received from a control processor and initiates executing a command in response to detecting particular identified messages in the stream of messages.
  • the message monitor includes a message table including a set of message table entries. Each entry comprises a message ID and a command ID.
  • a message receiver of the facility includes a message monitoring functionality for receiving a message including a message ID value, and identifying a categorized message by locating an entry in the message table corresponding to the received message.
  • a command execution functionality initiates executing a command associated with the command ID, of the entry in the message table for the categorized message, in association with the message receiver identifying the categorized message.
  • the facility also carries out a status message monitor roles wherein the facility initiates executing a command in response to detecting status changes contained within messages in the stream of messages.
  • the message monitor includes a message receiver including a message monitoring functionality for identifying status changes relating to modes/events specified in a received message.
  • the facility also initiates executing actions in accordance with a current mode/events status in view of the received message. The actions comprise, for example, setting a new priority for an alarm.
  • the facility monitors the volume of messages passing over a period of time, and in response to detecting a message (e.g., alarm shower) the facility operates to restrict messages passed to intended destinations by applying a suppression criterion on the steam of messages. For example, when a shower is detected, messages/alarms that do not meet a message priority threshold are discarded by the facility.
  • a message e.g., alarm shower
  • Other criterions are contemplated in alternative embodiments of the invention.
  • FIG. 1 is schematic network diagram showing an exemplary process control environment comprising both a control network and an application/supervisory network suitable for carrying out an embodiment of the present invention
  • FIG. 2 is a schematic diagram of a message management facility incorporated into a node comprising interfaces to both the control network and application/supervisory network;
  • FIG. 3 is an exemplary list of types of information stored in a configuration file used to build a configuration database that governs the runtime operation of the exemplary message management facility depicted in FIG. 2 ;
  • FIG. 4 graphically depicts relationships between configuration information relating to command categories used by a message manager to initiate commands as a result of receiving particular messages
  • FIG. 5 graphically depicts relationships between configuration information relating to parameter action categories used by a message manager to initiate certain pre-configured actions in response to notifications of events/mode changes;
  • FIG. 6 graphically depicts the sources of information that supply information used to build application object connections used by a message manager to pass a parameter value to a particular target control block;
  • FIG. 7 is an exemplary graphical user interface for configuring general information relating to a message management facility configuration
  • FIG. 8 is an exemplary graphical user interface for configuring contents of a message table
  • FIG. 9 is an exemplary graphical user interface for configuring contents of a command categories table
  • FIG. 10 is an exemplary graphical user interface for configuring commands corresponding to the commands identified in the command categories table
  • FIG. 11 is an exemplary graphical user interface for configuring an action trigger table identifying a set of action category IDs
  • FIG. 12 is an exemplary graphical user interface for configuring matrices corresponding to the action category IDs referenced in the action trigger table
  • FIG. 13 is an exemplary graphical user interface for configuring parameter actions specifying particular parameter/value combinations associated with a particular parameter action ID potentially listed in a cell within a matrix of a set of matrices making up the action categories;
  • FIG. 14 is a flowchart summarizing steps associated with processing, by a message manager, a received message from the control network;
  • FIG. 15 is a flowchart summarizing steps associated with maintaining alarm shower status in view of configured alarm shower parameter values
  • FIG. 16 is a flowchart summarizing steps associated with processing, by a message manager, a categorized message.
  • FIG. 17 is a flowchart summarizing steps associated with processing, by a message manager, an event/mode change message.
  • a workstation configured to receive/route messages issued by control processors on a control network also monitors alarm flow. While monitoring alarm flow, a workstation applies previously configured policies to particular alarm messages. In response to detecting an identified alarm in a received message, the message management facility invokes particular actions/functions/programs on a workstation.
  • a configurator application and user interface enables a user to design/customize the message management facility to invoke a program upon detecting a pre-configured alarm being routed to a destination.
  • the invoked program can perform any of a variety of functions including, by way of example, issuing a voice message (stored as an MP3 or WAV file), sending an email message, or generating output to a printer, historian, etc.
  • a voice message stored as an MP3 or WAV file
  • the responses are created, identified, and stored in command databases that are customized via the configurator application.
  • the message management facility dynamically updates (and modifies if necessary) alarm priorities based upon changes to a current status of the process control system.
  • the status is defined, by way of example by a mode and/or event(s).
  • dynamically assignable priorities of a particular alarm are defined, for example, in a matrix comprising mutually exclusive modes and non-mutually exclusive events. For each mode/event combination within the matrix, an alarm priority is potentially specified for the alarm.
  • the message management facility responds to events and mode transitions by looking up a potentially new priority for each alarm for which priorities are potentially dynamically re-assigned.
  • mode transitions and/or events are defined/associated with simple state alarms.
  • the state alarms are, for example, hard wired to key switches.
  • the state alarms are also potentially soft alarms generated within the process control system based upon certain sensed plant conditions or control logic output.
  • an alarm shower suppression functionality counts alarms flowing per time slice to detect a potentially overwhelming quantity of alarms. It compares the count value in the time slice to a pre-configured limit. If the limit is exceeded, then an alarm shower state is entered and alarms having a priority lower than a pre-configured priority are not passed on to a destination workstation and are thus suppressed until a subsequent count of alarms over a period of time falls to a point where the alarm shower state can be exited. Thus, during an alarm “shower” only the most important/critical alarms are forwarded to an intended workstation. In this way, the most important/critical alarms will not be masked or delayed by lower priority alarms.
  • a message management facility 100 executes as an application on one or more specially configured nodes having physical network interfaces supporting connections to nodes on both a control network 102 and an application network 104 .
  • Such networks are implemented, by way of example, according to the ETHERNET standard local area network protocols.
  • the connections over the networks 102 and 104 are implemented by any of a variety of forms through separate network communications services executing on the same network node(s) as the message management facility 100 .
  • the message management functionality can be carried out by multiple active message managers running on separate nodes, coupled to the control network 102 and application network 104 , and handling particular identified/specified ones of the alarms generated by control processors on the control network 102 .
  • the message management facility 100 carries out a variety of functions. Such functions include, by way of example, receiving messages including mode changes, events, and alarms from message delivery services running on nodes on the control network 102 ; modifying the messages (e.g., adding an alias to a message); and dispatching alarm messages to designated destinations (e.g., alarm management subsystems on operator workstations, alarm logs/databases, alarm printers, etc.).
  • the alarm messages drive graphical user interface displays and alarm annunciation components that generate an audible/verbal alarm message.
  • the message management facility 100 is capable of: dynamically adjusting alarm priorities in response to messages identifying sensed events and operation mode (e.g., standby, startup, run, etc.) transitions; invoking a command (performed either locally or on another node coupled to the application network 104 ) in response to a particular received alarm message; and commencing an action resulting in issuance of an audible (e.g., verbal) message based upon a particular received alarm message.
  • identifying sensed events and operation mode e.g., standby, startup, run, etc.
  • invoking a command performed either locally or on another node coupled to the application network 104
  • commencing an action resulting in issuance of an audible (e.g., verbal) message based upon a particular received alarm message.
  • the message management facility 100 is presented in a redundant form including an active message manager 100 a and a standby message manager 100 b .
  • the redundancy can be implemented in any of a variety of ways in accordance with various embodiments of the invention.
  • the redundant message managers 100 a and 100 b synchronize and monitor status of their redundant partners by communications transmitted via the control network 102 .
  • synchronization is carried out via the application network 104 or even a third physical network (requiring a third network interface for each of the redundant message managers 100 a and 100 b ).
  • the standby message manager automatically takes on the active role previously held by the failed partner.
  • Each of the message managers 100 a and 100 b of the message management facility 100 are associated with network connections to one or more of a set of N control processors 106 on the control network 102 .
  • the control processors 106 execute a variety of automated distributed process control programs (loops), carried out in the form of compounds and blocks, that facilitate receiving data from sensors/devices deployed in a plant, analyzing the received data in view of current set points, and issuing control commands to actuators on plant equipment.
  • the set points are provided, for example, by automated supervisory process control programs as well as human input via the application network 104 .
  • control processors 106 are communicatively coupled to one or more sub-networks that host communications between the control processors 106 and sources of field data.
  • the sub-networks include, for example, a plurality of field communication modules.
  • the field communication modules in turn, comprise a portion of a field device sub-network/bus including various sensors and actuators that facilitate automated control of a industrial/plant process.
  • the active and standby message managers 100 a and 100 b receive alarm messages issued by a message delivery server (MDS) executing on each of the control processors 106 . Both active and standby message managers 100 a and 100 b process messages received from the control processors 106 concurrently. However, as explained further herein below, processing alarm messages on the standby message manager 100 b does not include issuing messages to devices configured in the message manager's device database.
  • MDS message delivery server
  • the message management facility 100 establishes connections to one or more of a set of operator workstations on the application network 104 .
  • a set of operator workstations on the application network 104 In the illustrative redundant message manager configuration depicted in FIG. 1 , only the active partner of the redundant message managers 100 a and 100 b establishes connections to the devices on the application network 104 . Thereafter, the active partner of the message management facility 100 forwards/routes the received messages to a variety of destinations on the application network 104 , and if specified in a set of message management tasks, invoking an operation.
  • the destinations to which the alarms are forwarded by the message management facility 100 include, by way of example, an alarm management subsystem executing on one of a set of M operator workstations 108 , an alarm printer 112 , an alarm database/historian 110 , etc.
  • the message management facility 100 is carried out in alternative network topologies.
  • the node executing the message management facility 100 incorporates the functionality of other nodes of the application network 104 .
  • the alarm database and workstation functionality is incorporated into a node connected to the control network 102 that also runs the message manager 100 b .
  • multiple instances of the message management facility 100 are provided to share message management responsibilities for a set of devices coupled to the application network 104 . Still other embodiments will be contemplated by those skilled in the art in view of the disclosed embodiments described herein.
  • FIG. 2 depicts a set of functional components of, and data flow within, the message manager 100 a that operates to process messages received from the control processors 106 on the control network 102 .
  • a packet receiver process 200 on the message manager 100 a comprising device database threads and message delivery server threads (one thread per control processor message delivery server to which the packet receiver 200 connects), receives and unpacks message packets, containing potentially many messages to reduce overhead, issued by the message delivery server (MDS) running on each control processor 106 x (including control processor 106 a or any other source of message packets) on the control network.
  • MDS message delivery server
  • a configuration database 204 contains configuration information, extracted from a configuration (see FIG. 3 below) defined via a message management facility configurator (described further herein below), that governs the runtime operation of the message manager 100 a .
  • the configuration database 204 contains: a Table of Message Attributes, Table of Category (command/action) Attributes, Matrix and Variable Definition, and Alarm shower Parameters.
  • the following describes an exemplary set/sequence of operations supported by an exemplary messaging interface between the message manager 100 a and a message delivery server (MDS) on the control processor 106 a .
  • the message manager 100 a uses inter-process communication services to initialize a connection between a dedicated message delivery server thread within the packet receiver process 200 and the MDS running on the control processor 106 a .
  • the message manager 100 a issues a START_SESSION message to the MDS to register the control processor 106 a and waits for a START_SESSION_REPLY message from the MDS.
  • the MDS After sending a START_SESSION_REPLY message, the MDS sends message group device definitions to a corresponding dedicated MDS thread of the packet receiver 200 .
  • the group device definitions include device information from connected MDS's on the set of control processors 106 .
  • the device information maintained in a device database 202 , indicates which devices (e.g., workstations, printers, alarm databases on the application network 104 ) receive certain identified messages.
  • the device information is, in effect, the routing information (destinations) for subsequently received messages.
  • the packet receiver 200 stores the extracted device (message routing) information in the device database 202 .
  • the device database 202 holds a set of group device definition entries. Each entry contains, by way of example, the following fields:
  • the device database 202 is also capable of being updated during normal runtime of the message manager.
  • the MDS sends a message to the message manager specifying new message destination information.
  • the packet receiver 200 recognizes the type of message and updates the appropriately keyed entry within device database 202 accordingly.
  • a device server process 220 described herein below, is notified when updated to the device database 202 occur in view of the possibility that a new threads may needed or old threads terminated in view of the device database 202 update.
  • the MDS threads of the message manager 100 a obtain current status information by sending a CURRENT_STATE_REQUEST to the MDS on the control processor 106 a .
  • the MDS returns message packets containing current alarm and contact input (CIN) states, which are associated with mode and event variables, present on the control processor 106 a as MESSAGE_DATA messages.
  • the responses from the MDS also include any MESSAGE_DATA messages buffered by the MDS on the control processor 106 a before initialization operations.
  • the message manager 100 a acknowledges each packet with a RECEIPT_CONFIRMATION message. The current state data transfer/acknowledgement cycles are repeated until a CURRENT_STATE_END message is received by the message manager.
  • the packet receiver 200 issues a MESSAGE_MAINTENANCE_REQUEST to the MDS and waits for the MDS to issue a MESSAGE_MAINTENANCE_REPLY message. All messages are transmitted by the MDS in the form of MESSAGE_DATA messages within message packets, and the message manager 100 a acknowledges each packet by transmitting a RECEIPT_CONFIRMATION message to the MDS on the control processor 106 a.
  • the packet receiver 200 extracts messages from the MESSAGE_DATA message packets and places the messages into one of: a variable determination messages queue 206 , a categorized messages queue 208 , a modified messages queue 210 , and the device database 202 .
  • the packet receiver 200 executes alarm shower detection according to a set of alarm shower parameters provided by a configuration database 204 .
  • alarm shower detection is characterized by a specified number of alarms received within a time period and an alarm priority value.
  • the alarm priority value establishes a priority threshold for alarms passed to devices, such as the workstations 108 on the application network 104 , in the event that an alarm shower is detected. Alarms having insufficiently high priority are discarded by the packet receiver 200 .
  • Configuring alarm shower behavior for the message management facility 100 including the message manager 100 a is described further herein below.
  • the standby message manager 100 b though assigned a passive role in forwarding alarm messages to devices, also registers/initializes with the same MDSs as the active message manager 100 a to ensure that all messages are received by both of the redundant message managers.
  • the message manager 100 a detects a connection failure
  • the message manager 100 a attempts to re-establish the connection to the MDS on the control processor 106 a . If an initial attempt fails, further attempts are initiated every second.
  • the messages received by the packet receiver 200 are parsed and stored, after potential modification, within an appropriate one of the message queues 206 , 208 and 210 .
  • the modified messages queue 210 is used to pass data from the packet receiver 200 to a device server process 220 .
  • Each entry in the modified messages queue 210 includes, by way of example, the following fields:
  • the device server process 220 reads messages from the modified messages queue 210 and routes the retrieved messages to appropriate device (e.g., workstation, alarm database, printer, etc.) destinations according to routing information provided by the device database 202 .
  • the device server process 220 contains destination-specific threads that convert the retrieved messages to a format specified for the particular device type of the identified destination residing on the application network 104 .
  • the messages destined for the alarm database 110 pass through an alarm database collector 222 .
  • the collector 222 communicates with the alarm database 110 via the application network 104 to place the alarm data in the database 110 . However, if the alarm database 110 is unavailable, then the alarm data is buffered in a temporary alarm data buffer 223 .
  • the buffered alarm data is retrieved from the buffer 223 and passed to the collector 222 before placing current alarm data in the database 110 .
  • device data can be updated during normal runtime operation of the message manager 100 a .
  • the device server 220 dynamically creates and deletes connections to devices via the application network 104 according to updates to the information placed by the packet receiver 200 in the device database 202 .
  • communications between the message manager 100 a and an alarm management subsystem (AMS) on the workstations 108 proceed as follows.
  • AMS alarm management subsystem
  • AMS server threads within the device server process 220 operate as message collectors for specific corresponding AMSs on the workstations 108 .
  • Each AMS server thread packs messages together so that a packet of messages is sent rather than single messages.
  • a timer function ensures that messages are sent after a time period even if a message packet is not full. The time (e.g. 500 ms) and the number of messages (e.g. 3) will vary according to various implementations. All alarm messages are time stamped.
  • the message manager 100 a includes a redundancy control subsystem 224 that facilitates exchanging information between the message manager partners of a redundant message management facility configuration. Examples of functions carried out by the redundancy control subsystem 224 include declaring a role and synchronizing configuration data.
  • the redundancy related data passes between the partners via the control network 102 . However, such data can be passed via the application network 104 or even a third (e.g., dedicated) network link.
  • the operation of the redundancy control subsystem 224 is customized according to a set of redundancy parameters stored in a system configuration file 226 . During normal operation, threads within the device server 220 inform the redundancy control subsystem 224 about current status of connections to associated devices.
  • the message manager 100 a includes a calculation and dynamic filtering process 228 .
  • the calculation and dynamic filtering process 228 relies on information from the configuration database 204 (described herein below with reference to FIG. 3 ).
  • the process 228 reads information stored within a set of related tables/matrices, and mode and event definitions maintained in the configuration database 204 .
  • Such information is, by way of example, provided in the form of an XML file rendered by a message manager configurator (described herein below).
  • the calculation and dynamic filtering process 228 retrieves a categorized message (previously placed by the packet receiver 202 ) from the categorized message queue 208 and initiates executing any commands associated with parameters provided in the categorized message (e.g., initiate a voice alarm, send a message, start a specified executable file, etc.).
  • the parameters of the categorized message queue 208 entries include: a message ID (e.g., compound/block/alarm type combination) and a category ID (specifying a command to be invoked and/or action commenced).
  • handling a message stored in the categorized message queue 208 is distinguished from handling of messages stored in the modified messages queue 210 (that are passed via the device server 220 to a particular destination based upon routing information in the device database 202 ).
  • the calculation and dynamic filtering process 228 also reads a message, previously placed by the packet receiver 202 , from the variable definition messages queue 206 to identify changes in mode and/or event variables.
  • An entry from the variable definition message queue 206 includes a single alarm state message associated with a mode or event variable.
  • the process 228 In response to events and mode transitions specified by a retrieved entry from the variable definition message queue 206 , the process 228 initiates executing configured parameter actions on one or more specified control block parameters.
  • the configured parameter actions include setting new alarm priority values based upon mode/event priority matrices provided for identified alarms.
  • the new priorities for particular alarms are transmitted by the message manager 100 a to the control processor 106 a in the form of an application object parameter action identifying a compound, block, and parameter/value.
  • the calculation and dynamic filtering process 228 reads category attributes and variable definitions from the configuration database 204 .
  • the calculation and dynamic filtering process 228 reads the variable determination message queue 206 and the categorized messages queue 208 and takes the following actions.
  • a variable determination message is read from the queue and a new value for a mode or event variable is determined.
  • the first messages in the variable determination message queue 206 are the CURRENT STATE messages from contact input (CIN) blocks that determine the values of mode and event variables.
  • the values of the mode/event variables are applied to a set of category action matrices to determine actions on parameters (e.g., assign a new priority to an alarm parameter) in view of the change to the mode/event state.
  • a mode or event variable changes when a mode or event variable changes, a table of action trigger message attributes is reviewed, and parameter values (e.g., alarm priorities) affected by the mode/event change are detected.
  • the new value e.g., priority
  • a mutual exclusivity indicator defining whether an event is mutually exclusive or not, is taken into account. In such cases, the most recently received event is the only one taken into account when determining parameter actions. In the case of non-mutually exclusive events, the highest priority is used when more than one event is simultaneously set.
  • an internal monitor process 230 is provided to oversee the operational status of each process of the message manager 100 a .
  • the monitor process 230 reads a list of message manager processes and parameters, describing the operation of the message manager, from the configuration database 204 .
  • the internal monitor process 230 detects monitored process failures and attempts to re-start the monitored process without re-starting the entire message manager.
  • MDSs message delivery servers
  • AMSs alarm management subsystems
  • the data structures described below are exemplary MDS and MM message structures.
  • the structures represent messages sent from the MDS to the MM and messages sent from MM to the MDS.
  • MDS_CONCAT_MSG the structure of message packets exchanged between the MM and MDS. This data structure contains the following fields:
  • the data structures described in this section represent incoming messages to the MM from the MDS.
  • the MDS concatenates multiple messages, up to a specified value (MAX_MSG_PER_PACKET), in one message packet and then sends the packet to the MM.
  • the maximum size of a packet is specified by a value MAX_PACKET_SIZE.
  • the MDS_MAX_MSG_PER_PACKET (initially 10) and MDS_MAX_PACKET_SIZE (initially 5000) are configurable.
  • FROM_MDS_MSG defines the various types of a single message delivered to the MM from MDS, and contains the following information:
  • MDS_START_SESSION_REPLY_MSG used for the message block type MM_START_SESSION_REPLY
  • MDS_CLIENT_SIMPLE_REPLY_MSG used for the message block types MM_END_CURRENT_STATE_UPDATE, MM_MESSAGE_MAITENANCE_REPLY, MM_TEMPORARY_DISCONNECT_REPLY, MM_RECONNECT_REPLY and MM_END_SESSION_REPLY
  • MDS_DATA_MSG used for the message block type MM_DATA_MESSAGE MDS_START_SESSION_REPLY_MSG: defines the data structure of the reply to a start session message received by the MM and contains the following:
  • the data structures described herein below represent outgoing messages from the MM to the MDS.
  • the MM sends only one message in a message packet.
  • FROM_MM_MSG defines the various types of a single message delivered from MM to MDS, and contains the following:
  • MDS_START_SESSION_MSG used for the message block type MDS_START_SESSION
  • MDS_CLIENT_REQUEST_MSG used for the message block types MDS_START_CURRENT_STATE_UPDATE, MDS_MESSAGE_MAITENANCE, MDS_TEMPORARY_DISCONNECT, MDS_RECONNECT_REQUEST and MDS_END_SESSION
  • MDS_RECEIPT_CONFIRMATION_MSG used for the message block type MDS_RECEIPT_CONFIRMATION
  • MDS_START_SESSION_MSG defines the data structure sent by the MM to indicate a session start, and contains the following:
  • MDS_MSG defines the data structure received by the MM and provided by a Control Processor or a Data Provider through MDS. These messages are received by the packet receiver 202 .
  • MDS_MSG is used to format a buffer in MDS_DATA_MSG if the message mode is CurrentStateMode or MessageMaintenanceMode, and contains the following:
  • the following describes a set of exemplary message structures used to send messages from the MM to the AMSs running on the Workstations 108 .
  • These message structures represent messages sent from the MM to an Alarm Alert (AA) task.
  • the Alarm Alert task is the part of the AMS that communicates with the MM via the application network 104 .
  • the data structures described herein below represent incoming messages to the AA from the MM.
  • the MM concatenates multiple messages, up to MAX_MSG_PER_PACKET, in one message packet and then sends the packet to the AA.
  • the maximum size of a packet will be MAX_PACKET_SIZE.
  • the MAX_MSG_PER_PACKET is equal to 3
  • the MAX_PACKET_SIZE is equal to 2048, but both values can be altered.
  • AMS_CONCAT_MSG used in defining the message packets. This data structure contains the following:
  • the following message formats are utilized to send alarm messages from the MM to the AA task running on a workstation. These message formats are also used to send process and system alarm messages to a printer (as a print command with an attached buffer containing the alarms to be printed).
  • ALARM_MSG a buffer defined in a header definition (e.g., alarmmsg.h) is used to send process alarm messages from the MM to the AA (or alarm printer).
  • S_APRNF a buffer defined in a header definition (e.g., aprintf.h) is used to send user defined messages via APRINT to an alarm printer.
  • a header definition e.g., aprintf.h
  • the message manager configurator enables specifying the following:
  • the configurator output referred to as a “message manager configuration set” is stored in the form of an XML file.
  • the message manager configuration set that is used to build the configuration database 204 includes a message table 300 , command categories table 310 , command table 320 , action trigger table 330 , action category table 340 , parameter action table 350 , and general information table 360 .
  • the general information 360 includes: a configuration name, a definition of modes, a definition of events, and alarm shower parameters.
  • the message manager 100 a utilizes alarm states of CIN blocks to determine current values for mode and event variables.
  • the numbers of configured modes and events define a 2-dimensional matrix organizing up to 32 fields (cells) for specifying resulting parameter actions.
  • the parameter actions are potentially utilized for reprioritization, inhibition, and disablement of alarms.
  • the data within the general information 360 contains the following information:
  • the above-identified alarm shower parameters are one example of many potential ways to suppress a sudden surge of alarms so that only ones meeting a particular priority threshold are passed along to devices. For example one may instead measure a shower based upon alarms passed to a particular device rather than all received alarm messages. Such modification, addresses the differing capabilities of various specific destinations on the application network 104 to handle high volumes of alarm messages. Also, the alarm threshold may be applied in a stepped manner such that as the number of unacknowledged alarms increases, the threshold priority raises (as a guard against setting too low a threshold priority). Furthermore, a further parameter facilitates specifying a minimum time period within which shower suppression will be turned on, once activated, to avoid excessive toggling between on/off shower suppression states.
  • the message table 300 , command categories table 310 , and command table 320 facilitate specifying particular commands that are invoked by the (active) message manager 100 a in response to receiving messages having a particular message ID.
  • the message table 300 includes a set of n message entries wherein each entry includes a set of message attributes that belong to a particular identified alarm message. Each entry contains, by way of example, the following information:
  • the command categories table 310 is populated by a set of m entries wherein each entry specifies attributes (e.g., executable commands) for each identified command category.
  • attributes e.g., executable commands
  • the command table 320 contains a set of j entries corresponding to the various commands invoked by the message manager 100 a on occurrence of particular alarms specifying a particular command ID.
  • Each command table 320 includes, for example, the following information:
  • the action triggers table 330 , action categories table 340 and parameter actions table 350 contain configuration information relating to dynamically re-assigning priorities of particular alarms in accordance with mode changes or events received by the message manager 100 .
  • the action triggers table 330 includes a set of r entries corresponding to particular blocks, for which actions (e.g., setting a new alarm priority) are to be invoked when the mode or event changes. Each entry contains the following information:
  • the s matrices within the action categories table 340 contain parameter action IDs.
  • a particular cell is accessed, within a matrix (corresponding to a specified action category ID), based upon a current mode and/or event, and the parameter action ID within the selected cell determines a group of one or more parameter actions accessed within the parameter actions table 350 .
  • Each matrix entry is associated with:
  • the parameter actions table 350 contains t entries specifying groups of m parameter actions, that have to be performed when a state alarm occurs which is configured to change the value of a mode or event variable.
  • Each of the t entries in the table contains the following information:
  • FIG. 6 illustratively depicts the construction of an application object connection name corresponding to an application object connection.
  • the application object connection name is thereafter used by the message manager 100 a to pass a value invoking a parameter action on a specifically identified parameter (e.g., set a new alarm priority value on a particular compound/block/alarm combination).
  • each application object connection name 600 is established from the following application object connection configuration information:
  • the configuration name appended to the compound number makes up a unique application identification
  • the block name comprises the object part
  • the parameter name comprises the attribute part of the whole application object connection name which is specified in the form of A:O.A (application:object.attribute).
  • Changes in a previously saved configuration potentially removes parameter actions from the parameter action table 350 .
  • corresponding application object connections are also removed. Removing an existing application object connection is done by overwriting a previously configured application object connection entry in the configuration database 204 with a default value.
  • configuration information is presented in the form of comma separated values (CSV) which are readily parsed and used by a number of editor programs.
  • CSV comma separated values
  • the general information 360 includes four keyword lines containing special keywords as the first entry in the line. Each of these four key-word lines mark the beginning of a particular section of the general information 360 .
  • the first line of the general information contains a first keyword line that specifies whether alarm shower detection is switched on. The two alternatives comprise, for example, “ALARM_SHOWER_DETECTION_ON” and “ALARM_SHOWER_DETECTION_OFF.” If alarm shower detection is specified to be on, the first keyword line is followed by a line, before the second keyword line, having three values. The three values represent the alarm shower parameters: number of unacknowledged alarms (range 1 to 10,000), time period in milliseconds (range 1000 to 60000) and threshold alarm priority (range 1 to 5).
  • the second keyword line of the four keyword lines determines whether the modes are displayed in rows or columns of an action categories matrix (displaying priorities for an alarm according to present mode/event status). This display option facilitates displaying the mode/event matrices based on the number of modes and the number of events.
  • the content of the second keyword line is either “DISPLAY_MODES_IN_ROWS” or “DISPLAY_MODES_IN_COLUMNS”.
  • a third keyword line determines whether listed events are mutually exclusive.
  • the content of the second keyword line is either “EVENTS_MUTUALLY_EXCLUSIVE” or “MULTIPLE_EVENTS_AT_THE_SAME_TIME)”.
  • multiple lines are provided that contain three values defining the events (one event per line).
  • a forth keyword line determines whether the matrices are one-dimensional or two-dimensional.
  • One-dimensional matrices are defined either by only modes or by only events, two-dimensional matrices contain cells defined by both modes and events.
  • the text of the fourth keyword line is either ONLY_MODES, ONLY_EVENTS or MODES_AND_EVENTS. If ONLY_MODES is specified, then an error is generated at validation time if there are any lines (defining events) between the third and the fourth keyword lines. Similarly, if ONLY_EVENTS is specified, then an error is generated at validation time if there are any lines (defining modes) between the second and the third keyword lines.
  • the message table file 300 contains five entries per line separated by commas. All four separators (commas) are mandatory. Entries may be empty for data exchange, but may be required later for correct validation.
  • the first three entries in a line contain the message ID including: a compound ID, a block ID and alarm type ID.
  • the fourth entry specifies a command category ID for the message.
  • the fifth entry represents the alias name. As shown in the first line of the example below, if the alias name contains any comma this entry is quoted. If the alias contains any quote symbol, the whole alias is quoted and the internal quote is doubled.
  • IACOMPOUND01,BLOCKNAME001,HIOUT,A001,“Alias, incl.“”,“” (commas&quotes)” IACOMPOUND01,BLOCKNAME002,LOABS,CATEG003, Alias name without any comma IACOMPOUND02,BLOCKNAME001,HIABS,,No category defined IACOMPOUND03,NEWBLOCK,LODEV,NOALIAS, IACOMPOUND03,BLOCKNAME001,HHABS,C003,Alias Text for this Alarm.
  • the command categories table 310 contains three entries per line separated by commas. The separators are mandatory. Entries may be empty for data exchange, but may be required later for correct validation.
  • the first entry specifies a command category ID.
  • the second and third entries identify up to two commands (by name/identifier) to be executed for alarms specifying the command category ID identified in the first entry of the line.
  • the command table 320 contains three entries per line separated by commas. Both separators are mandatory. Entries may be empty for data exchange, but may be required later for correct validation.
  • the first entry contains the command ID (specified by entries of the command category table 310 ).
  • the second entry contains the hostname of a network node that will execute the command/action.
  • the third entry contains command line text (including any parameter values needed to invoke a desired action). If the command line contains a comma, then the command line entry is quoted. If the command line contains any quote symbol, the command line is quoted and the internal quote is doubled.
  • the action triggers table 330 contains three entries per line separated by commas. Both separators are mandatory. Entries may be empty for data exchange, but may be required later for correct validation.
  • the first entry contains a compound ID and the second entry identifies a block ID for which actions have to be triggered when a mode or event changes.
  • the third entry contains an action category ID specifying an entry within the action categories table 340 .
  • the action categories table 340 contains a variable number of entries dependent on the number of modes and the number of events.
  • the total number of entries per line is equal to (number-of-events*number-of-modes)+1. All separators are mandatory. Entries may be empty during data exchange, but may be required later for correct validation.
  • the first entry contains the action category ID (referenced by entries in the action triggers table 330 ). All the remaining entries of the line (from the second to the last) contain the parameter action IDs (corresponding to entries in the parameter actions table 350 ) that are stored in a matrix corresponding to the action category ID.
  • the number of modes and the number of events depend on the current configuration in the general information file where the modes and events are defined.
  • the number of modes and events must already be configured as needed for the action categories in the file. If the general information table 360 is empty, then a file containing the general information is read to obtain a number of events and number of modes. The data is thereafter stored within a table mode by mode including all events for each mode.
  • Example Action Categories Table (Note: the Names Assigned to the First Line Such as MxEy are Chosen to Demonstrate the how the Elements of Each Mode/Event Matrix are Stored Rather than the Actual Values Stored at the Location.): TABLEA01,M1E1,M1E2,M1E3,M1E4,M1E5,M2E1,M2E2,M2E3,M2E4,M2E5,M3E1,M3E2, M3E... TABLEB01,REPR1,NOINHIB,,,,REPR2,,R2NOD0,,INHALMGRP2,REPR3,INHIB,,,, REPR4...
  • the parameter actions table 350 contains three entries per line separated by commas. Both separators are mandatory. Entries may be empty for data exchange, but may be required later for correct validation.
  • the first entry contains a parameter action ID referenced by a matrix entry from the action categories table 340 .
  • the second entry contains a parameter name.
  • the third entry contains a new value for the parameter identified in the third entry.
  • the parameters for which new values are set include, by way of example, alarm priorities. However, any parameter value is potentially modified using this mode/event-driven value selection procedure.
  • an exemplary graphical user interface depicts the information associated with the general information table 360 .
  • the page displaying the contents of the general information table 360 comprises four groups of data: a configuration name (e.g., MMGRP1), the presently configured alarm shower parameters (unacknowledged alarms—50, unacknowledged alarm counting period—100 milliseconds, and threshold priority—2), a set of mode definitions, and a set of event definitions).
  • Alarm shower detection is activated/de-activated by toggling the checkbox next to the text “Alarm shower Detection” and then applying the new configuration to the message management facility 100 .
  • a list of contact input (CIN) blocks defines the modes used for parameter actions (to set new values to parameters).
  • Each entry in the list contains a compound and block supplemented with a mode name used as a title for a row/column of a mode/event matrix.
  • the compound can be selected from a list of all compounds available in the system, or typed in directly. Once a compound is entered the block is similarly selected.
  • the number of elements in the mode list defines the number of modes and thus one dimension of the mode/event matrix used for determination of parameter actions.
  • the check box “Only Modes” at the bottom of the mode list allows specifying the matrices for parameter actions to be one-dimensional and defined only by modes (no event can be defined).
  • the mode/event matrices are limited to 32 cells. Therefore, if “Only Modes” is checked, the number of modes must be less or equal than 32. If “Only Modes” is unchecked the product of multiplying the number of modes by the number of events specified in the general information for a particular configuration is less or equal than 32. So the maximum number of supported modes is limited by a previously configured number of events. Appending and inserting modes is disabled when the maximum allowed modes is reached.
  • a list of CIN blocks defines the events used for parameter actions (to set new values to parameters).
  • Each entry in the list contains a compound and block supplemented with an event name used as a title for a row/column of the mode/event matrix.
  • the compound can be selected from a list of all compounds available in the system, or typed in directly. Once a compound is entered the block is similarly selected.
  • the number of elements in the list defines the number of events and thus one dimension of the mode/event matrix used for determination of parameter actions.
  • the check box “Only Events” at the bottom of the list allows specifying the matrices for parameter actions to be one-dimensional and defined only by events (no mode can be defined).
  • the mode/event matrices are limited to 32 cells. Therefore, if “Only Events” is checked, the number of events must be less or equal than 32. If “Only Events” is unchecked the product of multiplying the number of modes by the number of events specified in the general information for the particular configuration is less or equal than 32. So the maximum number of supported events is limited by a previously configured number of modes. The buttons to append or insert further events are disabled as soon as the maximum is reached.
  • FIG. 8 an exemplary graphical user interface for displaying/specifying the contents of the message table 300 is depicted.
  • the message table 300 specifies a command category and/or an alias name for a message.
  • Each message is uniquely identified by compound, block and alarm type. All three sub-fields must be filled out to avoid a validation error.
  • a command category ID and/or an alias name is assigned to each displayed message entry. If a command category is not filled, then no command category is assigned to the message. If a command category ID is configured it is used as a search key for an entry within the command categories table 310 .
  • the compound name for a message entry is specified from a list of all compounds which are available in the system, or alternatively, typed in directly. Once a compound is entered a block is similarly selected. Thereafter, an alarm associated with the selected block is similarly designated.
  • the command category ID may either be selected from a list or typed in directly.
  • an optional alias name (a text message describing an alarm), if configured, is added by the packet receiver 200 in the message manager 100 a to a received message at runtime.
  • the command categories table 310 includes a set of entries corresponding to classes of messages having a same behavior with regard to invoking specific commands (up to two) for execution.
  • Examples of commands initiated by the message manager 100 a in response to received messages include voice messages and external commands (directed to another machine such as one of the workstations 108 on the application network 104 .
  • a command is invoked on a media player with an appropriately identified voice file (e.g., a .wav file stored on the target system). Configuring voice messages is handled in the same way as other executable commands.
  • Each entry in the exemplary command categories graphical user interface depicted in FIG. 9 includes up to two command IDs for each listed command category ID.
  • the actual command commands corresponding to the command IDs are stored in the command table 320 .
  • Each cell in the columns “Command Id 1 ” and “Command Id 2 ” of the command category table allows alternatively the selection of an already defined command from a previously defined list or the direct input of a command identifier to be defined later.
  • an exemplary graphical user interface displayed by the configurator displays a list of command entries stored within the command table 320 .
  • the command table defines commands triggered by reception of a particular message specifying a command category ID that in turn specifies a particular command ID corresponding to that command.
  • Each command entry is identified by a unique name that is displayed in the Command ID column of the user interface.
  • An Executing Host column displays the name assigned to the host designated to execute the command (e.g., play the voice message). If no host is specified, then the host is the local host upon which the message manager executes.
  • the Command column displays a command line executed by the identified host. Entries are edited (added, deleted, modified) manually by a user via the exemplary user interface.
  • an exemplary configurator graphical user interface is depicted that facilitates viewing and editing entries within the action triggers table 330 .
  • the action triggers table facilitates attaching action categories to blocks for which parameter actions (e.g., specifying a new alarm priority value) are performed when a mode or event changes.
  • a Compound column and Block column together uniquely identify a block upon which the parameter action is to be performed.
  • An Action Category ID column specifies a unique action category ID that specifies a particular action category (matrix) to be evaluated to determine a parameter action ID that, in turn specifies one or more parameter actions performed on the specified compound:block combination.
  • an exemplary configurator graphical user interface displays the contents of a set of entries within the action category table 340 .
  • each entry of the action category table 340 defines a mode/event matrix having cells specifying parameter action IDs (further defined in the parameter actions table 350 ).
  • a list of all currently configured action category matrices is depicted under the section of the user interface entitled “Action Category ID”.
  • the illustrative matrix for the currently selected ACtg-1 action category is a two-dimensional matrix including four modes (identified in the column headings) and five events (identified at the head of each row)—resulting in a total of 20 potential cells for specifying a parameter action ID.
  • the matrix is one-dimensional, if either “Only Modes” or “Only Events” is checked on the “General” page of the configurator user interface. If “Only Modes” is checked, one cell for each mode is displayed and there is no event title above or before the cells. If “Only Events” is checked, one cell for each event is displayed and there is no mode title above or before the cells.
  • the graphical user interface allows selecting a previously defined parameter action from a list box or directly inputting a parameter action identifier—which is defined later.
  • an exemplary configurator graphical user interface is displayed for accessing/editing the contents of the parameter actions table 350 .
  • the values of parameters associated with a particular block on one of the control processors 106 can be changed by the message management facility 100 in response to a change to the value of a mode or event variable.
  • Setting a parameter values on the block is referred to herein as a parameter action.
  • One use of such parameter actions is setting a new priority on an alarm parameter for a block.
  • a parameter action ID column of the exemplary user interface identifies parameter action IDs for parameter actions stored in the parameter actions table 350 .
  • the parameter action ID values are not unique and thus a single parameter action ID can result in changing multiple parameters on a block.
  • a group of parameter actions invoked at a same time are assigned a same parameter action ID.
  • a user may write all values directly into the parameter action table cells.
  • the configuration information described herein above is stored in the form of an XML file.
  • the message manager 100 a parses the XML file rendered by the configurator and stores resulting alarm and message management configuration information in the configuration database 204 .
  • FIG. 14 a set of steps summarize the processing of received messages including alarms.
  • the packet receiver process 200 initially applies alarm shower detection/suppression procedures to determine whether to discard the received message (a discarded alarm message will not be passed on to its intended destination on the application network 104 ).
  • alarm shower detection is enabled, then control passes to step 1410 wherein an alarm shower state (i.e., detected/not detected) parameter value is determined (see, FIG. 15 for an exemplary method for determining an alarm shower state).
  • step 1410 If the alarm shower parameter indicates that an alarm shower was indeed detected, then control passes from step 1410 to step 1420 .
  • a priority of the received alarm message is compared to an alarm priority threshold value. If the priority of the received alarm message does not meet the alarm priority threshold value, then control passes to step 1425 wherein the alarm message is discarded instead of passing the alarm message to the intended destination (e.g., a workstation on the application network 104 ). However, if the priority assigned the received message exceeds the threshold priority, then control passes from step 1420 to step 1430 wherein further tests are commenced to determine which of the available message queues to place the received message. If at step 1400 , alarm shower detection is disabled, then control passes directly to step 1430 . Furthermore, if at step 1410 an alarm shower detected state has not been set, then control passes to step 1430 .
  • the packet receiver 200 consults the message table 300 to determine whether a corresponding message entry can be found. If at step 1430 the received message's ID cannot be located in the message table 300 , then control passes to step 1435 wherein the received message is placed within the modified messages queue 210 without modifications by the packet receiver 200 . As previously mentioned, the device server 220 retrieves the messages from the modified messages queue 210 and passes them to one or more destinations in accordance with destinations identified in the device database 202 . If, at step 1430 , the received message's ID is located in the message table 300 , then control passes to step 1440 .
  • an alias (if provided in the entry within the message table 300 ) is added to the received message before adding the entry to the modified messages queue 210 .
  • the packet receiver 200 determines the received message is associated with a category (i.e., the corresponding entry in the message table 300 includes a category ID), then control passes to step 1455 .
  • an additional copy of the received message, along with its associated category ID is placed in the categorized messages queue 208 . Processing of an entry from the categorized messages queue 208 (described herein below with reference to FIG.
  • command/executable program 16 results in the invocation of a command/executable program by the message manager (e.g., message manager 100 a ).
  • a command/executable program can be of virtually any type.
  • one example of such command results in the initiation of a voice message stream play sequence by a set of nodes on the application network 104 to provide an audible warning when a particular alarm message is received.
  • step 1450 determines whether the message is associated with a category ID. If the message is associated with a category ID, then control passes from step 1450 to step 1460 (also entered from step 1435 described herein above).
  • step 1460 if the received message is a variable determination message (i.e., one providing notification of an event/mode change), then control passes to step 1465 wherein a copy of the received variable determination is placed in the variable determination messages queue 206 for further processing. Processing entries retrieved from the variable determination messages queue, e.g., updating alarm priorities in response to events/mode changes, is discussed further herein below with reference to FIG. 17 . Finally, if the message is not a variable determination message, then control passes from step 1460 to the End.
  • a variable determination message i.e., one providing notification of an event/mode change
  • FIG. 15 a set of steps are summarized that describe an exemplary way of carrying out the alarm shower detection aspect of an exemplary message management facility.
  • the shower detection procedure is responsible for setting an “alarm shower detected” parameter under certain circumstances. Once detected, the packet receiver discards alarm messages that do not meet a pre-set threshold priority.
  • control passes to step 1500 wherein an alarm counter value for the just completed period is determined.
  • step 1510 if the alarm counter value exceeds a configured number of alarms (a maximum number of received alarms permitted in the alarm count period by the message manager without triggering an alarm shower condition), then control passes to step 1520 wherein the alarm shower detection parameter is set to indicate the presence of an alarm shower.
  • the alarm shower detection parameter is set to indicate the presence of an alarm shower.
  • messages with a priority lower than a currently configured threshold priority are discarded by the message manager 100 a .
  • step 1540 the alarm counter is reset and a next alarm count period is started. Thus, the alarm shower “detected” status is maintained for at least one alarm count period once detected.
  • the alarm shower detection parameter is reset to indicate that alarm shower conditions were not present in the just completed alarm count period.
  • the alarm shower parameter state is based upon a just completed count period, and a current alarm shower parameter state will persist until a next count period is completed.
  • step 1600 the calculation and dynamic filtering process 228 retrieves a categorized message from the categorized messages queue 208 and the associated command category ID is determined. Thereafter, at step 1610 the command category ID is applied to the contents of the command categories table 310 to identify one or more executable command IDs (see FIG. 9 for exemplary table 310 contents). Next, at step 1620 the command IDs identified during step 1610 are applied to the contents of the command table 320 (see FIG. 10 for exemplary table 320 contents).
  • the calculation and dynamic filtering process 228 initiates execution of a command line (or any other executable command) in accordance with the contents of entries in the command table 320 corresponding to the command IDs identified during step 310 .
  • the command can be a locally executed command (on the message manager 100 a ) or alternatively on a host identified in the “executing host” sub-field of an entry in the commands table 320 .
  • FIG. 17 a set of steps are summarized for processing messages retrieved from the variable determination messages queue 206 .
  • the calculation and dynamic filtering process 228 retrieves a variable determination message from the variable determination messages queue 206 and an event/mode change (current event/mode state) is determined. Thereafter, the steps identified in FIG. 17 , are performed to apply the current event/mode state to each entry in the action triggers table 330 (see FIG. 11 for a representative set of action trigger table entries) to render and execute a set of parameter actions on corresponding compound/block/parameter combinations on the control processors 106 of the control network 102 . While the present example comprises initiating changes to parameter (e.g., priority) values on identified control blocks maintained by control processors 106 , this activity can be generalized to any particularized actions invoked in response to events/mode changes that render a particular event/mode state.
  • parameter e.g., priority
  • the action category ID specified for a particular entry in the action triggers table 330 is applied to the action categories table 340 to locate a particular mode/event matrix corresponding to the action category ID (see FIG. 12 ). Thereafter, at step 1710 the present mode/event state is applied to the particular referenced mode/event matrix to determine a parameter action ID, if any, corresponding to a cell within the referenced mode/event matrix corresponding to the present mode/event state. As mentioned above, in the case where events are not mutually exclusive, a highest priority event determines the selection of a cell in the mode/event matrix. Otherwise, the most recently registered event controls.

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CN2005800462866A CN101128812B (zh) 2004-11-26 2005-11-23 用于工业过程控制环境的消息管理设施
PCT/US2005/042491 WO2006058090A2 (en) 2004-11-26 2005-11-23 Message management facility for an industrial process control environment
EP05852079A EP1836594A4 (de) 2004-11-26 2005-11-23 Nachrichtenverwaltungseinrichtung für eine industrielle prozesssteuerumgebung
US13/932,680 US9560109B2 (en) 2004-11-26 2013-07-01 Message management facility for an industrial process control environment

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