FI106477B - Paper making machine control method involves providing central processing unit for machine control and connection of process control units and input/output unit with basic unit assembly groups - Google Patents

Abstract

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Description

106477

Integrated machine control method Integrerat maskinstymingsförfarande 5

The present invention relates to a method for controlling a paper machine / board machine / nipple machine or the like, comprising paper groups / board machine / nipple machine or the like comprising assemblies such as headbox, wire section, press, dryer section, coating unit, finishing machine, etc. comprises a centralized rigid section (e.g., a section of control room, alarm, etc.), one or more process control units and one or more interface units, which are connected via control cables to the controlled units or actuators.

The present invention relates to a machine control system for a paper machine and to the placement of its components. Machine control is used herein to describe machine control, process control, quality control, and control systems. The process according to the invention is also suitable for use in paper / board converting machines (printing machines, laminate production).

20

The machine control system used to control the paper machine includes process control units and interface units, which in known solutions are centrally located outside the machine parts. From the placement space, cables are connected to the paper machine assembly groups, which are connected to each controlled device or member. In such a refrigeration system, the process control units and interface units are housed in a space for electrical equipment where they are protected from moisture, temperature variations, and other environmental loads.

In the arrangement described above, a control cable is introduced into each controllable device or member of the papermaking machine from an installation space located elsewhere, in which the process control and interface units of the machine control system are located. This cabling work between the 2 106477 installation space and the structural groups is done at the paper machine installation site. The installation work includes traction of the body and equipment cables, connection of the cable ends and testing of the cable connections. The above connection work is done after mechanical machine installation and significantly extends the paper machine installation schedule.

5

It is an object of the present invention to provide a method for reducing the cabling between the process control and interface units of a machine control system and the controlled actuators in the structural groups.

It is a further object of the invention to provide such a method of locating the interface units of a machine control system in connection with the structural units of a paper machine.

It is a further object of the invention to provide a method for positioning process control units of a machine control system in conjunction with structural units of a paper machine.

15

It is a further object of the invention to provide a method of protecting process control and / or interface units of a machine control system to be placed in conjunction with the structural units of a papermaking machine from environmental stress.

It is a further object of the invention to provide a method by which cabling between a machine control system and the devices to be connected to it is performed and tested * 'before the paper machine is delivered to a customer.

In order to achieve the foregoing and to be apparent objects, the method according to the invention is essentially characterized in that the process control units and / or interface units of the machine control rigid system are placed on a mechanical part of a machine / paperboard / nipple machine or similar.

30 Placing machine control system interface units and / or process control units within the paper machine assembly groups significantly reduces cabling work and 3,106,477 saves cable material between the interface units and controllable devices. At the same time, significant savings in installation lead-time are achieved. At the installation site, it is only necessary to track cabling between the power supply and bus connection between the centralized system part and the interface units.

5

In the icing according to the invention, the units of the machine control system are placed in connection with the mechanical assemblies of the paper machine, the hydraulic centers or the like in the same configuration as the other automation. Paper machine construction groups include, for example, headbox, wire, press, dryer section, coating unit 10 and finishing machines. In the arrangement according to the invention, the process control units and the interface units are protected from ambient temperature, humidity and vibration loads by a suitable enclosure.

In the following, the invention will be described in detail with reference to the exemplifying embodiments shown in the figures of the accompanying drawing 15, in which details the invention is not intended to be limited.

Fig. 1 is a block diagram of a papermaking machine control system according to the prior art.

20

Fig. 2 is a block diagram of a machine control system according to the invention in which * 'interface units are disposed in connection with paper machine structural units.

Figure 3 is a block diagram of a machine control system according to the invention in which the access units and process control units are disposed in conjunction with the paper machine structural units.

i <

Figure 4 illustrates an example of locating machine control system interface units and / or process control units within a paper machine assembly.

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Figure 5 illustrates an example of a papermaking unit assembly modules, each controlled by an integrated machine control method according to the invention.

FIG. headbox, wire, press, dryer, coating unit and post - processing machinery. The actuator control system controls actuators therein, e.g., valves or pneumatic actuators 10. Cabling LI ... .Ln can comprise dozens or hundreds of conductor pairs carrying a binary / analog signal.

According to the prior art, the machine control system process control units PCS and the interface units I / O are located in dashed installation space A, which is located 15 apart from the paper machine assembly groups. Installation space A has favorable temperature and humidity conditions for computer components.

Between the interface units I / O and the assemblies Ui ... Un, there is a bidirectional control-cabling L1 ... Ln which carries a control signal from the interface unit I / O to the device 20 to be controlled and a control signal from the controlled device to the interface unit I / O. Controlled actuators in each group of structures Ui ... Un are designated by reference numerals Dn ... D] m; ...; ... DNL DNM. Controlled Actuators Dn ... Dim; ...; Dn] ... Dnm may be located e.g. in the headbox, press section, dryer section, coating unit, roller mill or further processing machine 25

Fig. 2 is a block diagram illustrating a machine control system according to the invention in which the access units I / O are placed in connection with the paper machine assembly groups U [... Un in protected spaces indicated in Fig. 2 by dashed areas B] ... Bn. Units in the dashed areas are placed in a shielded cabinet or enclosure, or the like, within each paper machine assembly group Uj ... Un so that cabling between the I / O ropes and the Dni ... Dnm controlled devices can be installed and tested at the paper machine mill. The communication between the I / O interfaces and the PCS of the process control units is established on communication bus C.

Figure 3 illustrates a machine control system according to the invention in which both the process control units PCS and the interface units I / O are located in protected spaces adjacent to the paper machine assembly groups Ui .., Un (dashed areas Bi ... .B "). The process control units PCS located in each protected group Uj ... Un in the protected space Bi ... Bn are provided with a communication bus C which establishes a connection between the process control units PCS and other parts of the machine control system. The connection between the process control units PCS and the interface units I / O is established on the communication bus C. The process control units PCS located in each building group Uj ... Un also communicate with each other via the communication bus C.

The method according to the invention can be used to form a PCS, I / O integrated machine control module, which is placed in a protected space, into the machine control system components located in the groups of the paper machine. Figure 4 shows an example of a paper machine wire section in which two integrated machine control modules II, 12 are disposed within the paper machine assembly group in a space where the I / O and / or 20 process control units PCS are located (dashed areas B1 ... Bn in Figure 2 or 3). ..ponents). Interface units I / O and / or process control units PCS that are part of a machine control system are typically placed in conjunction with the UI ... UUs so that the hydraulic, pneumatic, lubrication, vibration control and electronics components to which the machine control module is integrated are located.

In the example of Fig. 4, the integrated machine control module II and 12 controls and measures, for example, electric, hydraulic or pneumatic actuators (control valves, solenoid valves), limit switches, pressure transmitters, temperature transmitters, etc. vibration sensors, etc.

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Figure 5 illustrates an example of a papermaking machine assembly that can each be controlled by an integrated machine control module, which is a process control and / or interface unit, placed in one assembly group of the machine control system. In the example of Fig. 5, the paper machine assembly group comprises six mechanical structural blocks 5 U1 ... U6, each of which can be provided with its own integrated machine control module. These integrated machine control modules are interconnected via a communication bus, allowing them to exchange information about each other's functions or status. Each integrated machine control module is also connected via a communication bus to other parts of the machine control system.

10

The claims which follow, within the scope of which the inventive idea is defined, may vary and deviate from the foregoing by way of example only.

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Claims (7)

A method of controlling a paper machine / cardboard machine / tissue machine or the like, which paper machine / cardboard machine / tissue machine or the like comprises 5 structural groups (Ui ... Un), such as an inlet carriage, a wire portion, a press, a drying portion, a a coating unit, a finishing machine, etc., and a machine control system for the paper machine / cardboard machine / tissue machine or the like comprises a centralized system part (CPU) (a part for, for example, control room, alarm and the like functions), one or more process control units (PCS ) and one or more connection units (I / O) which are connected to control cables (LI ... Ln) with units or functional devices (Dn ... Dim; Dni ... Dnm) to be controlled. characterized in that in the process, the process control units (PCS) and / or the connection units (I / O) of the machine control system are placed in a mechanical machine part in conjunction with the construction groups in the paper machine / cardboard machine / tissue machine or similar. • (» 2. A method according to claim 1, characterized in that the control cables (L1 ... Ln) are connected to the connection units (I / O) in a paper machine factory. 20 A method according to claim 1 or 2, characterized in that the process control units (PCS) and / or the connection units (I / O) are protected for ambient conditions, such as temperature changes, vibration, moisture and impurities with a protective enclosure. 25 Method according to any of claims 1 - 3, characterized in that the process control units (PCS) and / or the connection units (I / O) are placed in conjunction with the construction groups (Ui ... Un) in the paper machine in the same space as other automatic devices. (hydraulics, pneumatics, electricity, vibration monitoring). 10 106477 Process according to any of claims 1-4, characterized in that the process control units (PCS) located in conjunction with the construction groups (Ui ... Un) in the paper machine are connected to each other by a data communication path (C). 5 Method according to any of claims 1-5, characterized in that the connection units (I / O) located in the paper machine in connection with the construction groups (Ui ... Un) are connected to the process control unit (PCS) with a data communication device. pathway (C). 10 Process according to any of claims 1-6, characterized in that the process control units (PCS) and the connection units (I / O) located in the paper machine are connected to the other machine control system in connection with the construction groups (Ui ... Un). via a data communication path (C). »• 4