SE1600181A1 - Presenting process data of process control objects on a mobile terminal - Google Patents

Description

15 20 25 30 There is a problem in that a remote desktop solution is not ?exíble in that normally a user has to start from the same position in the graphical representation of the system before reaching a process control object in which he or she is interested. Furthermore, the displays of mobile terminals are small and there may be a need for a selection which process control objects are to be presented.

In a typical industrial plant there are one or more control rooms where operators are monitoring and controlling a process using real-time SCADA Supervisory Control system. A typical operator desk consists of many computer monitors that are displaying information about the process.

There is a need for operators to access the real-time information from the control system to the ?eld, basically they want to put the control room in their pocket. But how do you take a control room with multiple displays and put in something that fits in your pocket and that still maintains some form of ease of use? Today it is known to use remote desktop on a mobile device, connect to a desktop computer and stream (i.e., mirror) the display from the desktop computer to the mobile device.

- In a control room screen space is almost limitless, its not uncommon for operators to have desks where up to 9 monitors are installed. Mobile devices however have limited display sizes. iPhone6 has a screen size of 4,7 inch. An iPad will give you 9,7 inch screen size, still nowhere near the screen estate you get from a typical 24 inch desktop monitor (or multiple 24 inch monitors).

- The desktop Windows user interface (UI) is not built for access on a mobile device. Remote desktop does give operators the possibility to view and control their process control system from a mobile 10 15 20 25 30 device, since mirroring a 24” display to a 4,7 - 9,7 “ display will not result in the perfect user experience.

- Functionality overload. With remote desktop you have all functionality of process control system in your pocket, but do users really need to have every single feature available? Too much functionality leads to clutter and information overload, making it hard for end users to actually use the application.

- Using remote desktop does not leverage the full power of modern mobile terminals. The mobile terminal is limited to display windows graphics and simulating mouse and keyboard input. All the sensors, multi-touch, cameras, Bluetooth, RFID etc. are unused. Utilizing the mobile hardware better could lead to better apps.

The present invention addresses one or more of the above-mentioned problems.

SUMMARY OF THE INVENTION The present invention addresses the problem of simplifying the obtaining of details of process control objects. The invention is therefore directed towards improving the ease of obtaining details of process control objects via a mobile terminal.

This object is according to a ?rst aspect of the invention solved through a method of enabling a user of a process control system to obtain details of process control objects, the method being performed by a presenting control arrangement and comprises the steps of: - determining the location of a mobile terminal of the user based on detecting a unique identi?er of a Bluetooth beacon, - determining the process control objects in the location based on a mapping of process control objects to Bluetooth beacons, and - presenting graphical representations of the process control objects on a display of the mobile terminal. 10 15 20 25 30 This object is according to a second aspect of the invention solved through a data presentation control arrangement for enabling a user of a process control system to obtain details of process control objects, the data presentation control arrangement comprising: a positioning unit con?gured to - determine the location of a mobile terminal of the user based on detecting a unique identi?er of a Bluetooth beacon, and - determine the process control objects at the location based on a mapping of process control objects to Bluetooth beacons, and a presentation control unit con?gured to - present graphical representations of the process control objects on a display of the mobile terminal.

This object is according to a third aspect of the invention solved through a computer program product for enabling a user of a process control system to obtain details of process control objects, the computer program product being provided on a data carrier comprising computer program code con?gured to cause a data presentation control arrangement to, when the computer program code is loaded into at least one device providing the data presentation control arrangement, - determine the location of a mobile terminal of the user based on detecting a unique identi?er of a Bluetooth beacon, - determine the process control objects at the location based on a mapping of process control objects to Bluetooth beacons, and - present graphical representations of the process control objects on a display of the mobile terminal.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention will in the following be described with reference being made to the accompanying drawings, where 10 15 20 25 30 Fig. 1 schematically shows an industrial plant with a process control system operating an industrial process together with a mobile terminal associated with a maintenance engineer, Fig. 2 schematically shows a front view of a mobile terminal, Fig. 3 schematically shows a block schematic of the mobile terminal, Fig. 4 shows premises of the industrial plant comprising a number of Bluetooth beacons, where the mobile terminal is in the coverage of a ?rst Bluetooth beacon together with two process control objects, Fig. 5 schematically shows the user in the Bluetooth coverage with the two process control objects, Fig. 6 schematically shows a view shown on the display of the mobile terminal, Fig. 7 shows a ?ow chart of a number of method steps being performed in a ?rst variation of a method of enabling a user in a process control system to obtain details of process control objects, Fig. 8 shows a ?ow chart of a number of method steps being performed in a second variation of a method of enabling a user in a process control system to obtain details of process control objects, and Fig. 9 schematically shows a data carrier with computer program code, in the form of a CD-ROM disc, for performing the steps of the method.

DETAILED DESCRIPTION OF THE INVENTION In the following, a detailed description of preferred embodiments of a method, data presentation control arrangement and a computer program product for enabling a user of a process control system to obtain details of a process control object will be given.

Fig. 1 schematically shows an industrial plant where a process control system 10 is provided. The process control system 10 is a computerized process control system for controlling an industrial process. The process can be any type of industrial process, such as electrical power generation, transmission and distribution processes as well as water puri?cation and 10 15 20 25 30 distribution processes, oil and gas production and distribution processes, petrochemical, chemical, pharmaceutical and food processes, and pulp and paper production processes. These are just some examples of processes where the system can be applied. There exist countless other industrial processes. The processes may also be other types of industrial processes such as the manufacturing of goods. A process may be monitored through one or more process monitoring computers, which communicate with a server handling monitoring and control of the process.

In ?g. 1 the process control system 10 therefore includes a number of process monitoring computers 12 and 14. These computers may here also be considered to form operator terminals and are connected to a first data bus B1. There is also a gateway 16 connected to this ?rst data bus B1, which gateway 16 is connected to at least one wireless network WN. To the wireless network WN there is connected a mobile terminal 32. It should be realized that it is possible with more mobile terminals in the wireless network WN. However, only one is shown for simplifying the understanding of the present invention. The wireless network WN is a Bluetooth network, i.e. a network with a number of Bluetooth nodes, where at least some of the nodes are Bluetooth Beacons.

There is furthermore a second data bus B2 and between the ?rst and second data busses B1 and B2 there are connected a server 18 providing control and protection of the process and a database 20 where data relating to control and protection of the process is stored. Such data relating to control and protection may here comprise process data such as measurements and control commands, while data relating to protection may comprise alarm and event data as well as data on which alarms and events can be generated, such as measurements made in the process.

There is furthermore an optional data presentation control server 22 connected between the two buses B1 and B2. The data presentation control server 22 comprises a positioning block 19, a presentation control block 21 and a guiding block 23. This data presentation control server 22 does in a 10 15 20 25 30 ?rst variation of the invention provide a data presentation control arrangement. In other Variations of the invention it may be completely omitted, in which case the mobile terminal 32 forms a data presentation control arrangement.

To the second data bus B2 there is furthermore connected a number of further devices 24, 26, 28 and 30. These further devices 24, 26, 28 and 30 are ?eld devices, which are devices that are interfaces to the process being controlled. A ?eld device is typically an interface via which measurements of the process are being made and to which control commands are given.

Because of this the ?eld devices are furthermore process control objects. In one variation of the invention a ?rst ?eld device is a ?rst process control object 24, as an example a tank and the second ?eld device is a second process control object 26, as an example a centrifuge.

Fig. 2 schematically shows a front view of the ?rst mobile terminal 32. It simply comprises a display 34. The display 34 is in some Variations of the invention a touch screen via which data can be presented for the user of the mobile terminal 32 as well as via which data can be entered by the user, such as selections of various features in applications. It should be realized that in other variations of the invention the display may only be a display and the inputs provided through a keypad or a keyboard, a trackball, a joystick or some other buttons.

Fig. 3 shows a block schematic of the ?rst mobile terminal 32. The ?rst mobile terminal 32 comprises a bus 36 and to this bus there is connected the display 34, a processor 38, a program memory 40 as well as a radio communication circuit 42. The radio communication circuit 42 is furthermore connected to an antenna 44. The ?rst radio communication unit 42 and ?rst antenna 44 are provided for communication with the wireless network WN. 10 15 20 25 30 In the program memory 40 there is provided software code which when being run by the processor forms a positioning element 41, a guiding element 46 and a presentation control element 43. These element may together form a mobile Distributed Control System (DCS) app. In some embodiments of the invention the presentation control element 43 is merely a slave unit presenting process control object representations and other data under the control of the presentation control server 22, which server then forms the presentation control arrangement. In other Variations the positioning, guiding and presentation control elements 41, 45 and 43 are positioning, guiding and presentation control units of a presentation control arrangement, which receives process data from the presentation control server 22. In this latter case the mobile terminal 32 therefore forms a presentation control arrangement.

Fig. 4 schematically shows a facility 49 of the industrial plant. The facility 49 is here in the form of a building. In the building the ?rst and second process control objects 24 and 26 are located. The ?rst and second process control objects are furthermore in the coverage of a ?rst wireless access point 47 of the wireless network. The ?rst access points transmits using the Bluetooth protocol and is therefore also a Bluetooth beacon providing a ?rst beacon coverage B1. In this ?gure also the ?rst mobile terminal 32 is located in the ?rst beacon coverage B1, which indicates that also the corresponding user is in in a location covered by the ?rst Bluetooth beacon 47. In the building there are also further Bluetooth beacon coverages B2, B3, B4 and B6 each providing coverage of one or more process control objects 28, 30, 48, 50, 52, 54, 56, 58 and 60, 62 respectively. All the beacons cover different areas of the building and also different process control objects.

Furthermore the positions of the wireless access points 47 providing the Bluetooth beacons are typically known and because of this also the positions of the mobile terminals and consequently the users may be known. 10 15 20 25 30 A ?rst variation of the invention will now be described with reference also being made to ?g. 5 - 7, where ?g. 5 schematically shows the user of the ?rst mobile terminal in the ?rst room with the ?rst and second process control objects 24 and 26, ?g. 6 schematically shows a view shown on the display 34 of the mobile terminal 32 and ?g. 7 shows a ?ow chart of a number of method steps being performed in a ?rst variation of a method of enabling a user in the process control system to obtain details of process control objects.

The mobile terminals available today are equipped with a lot of different sensors, such as Bluetooth sensors. Using Bluetooth it would be possible to detect the position of the mobile terminal. A Bluetooth beacon may for instance transmit a unique identi?er. If the process control system 10 is also aware of the physical position of process control objects then it is possible to determine both the position of a mobile terminal and the process control objects in its vicinity using a Bluetooth beacon. The Bluetooth beacon can also be used for communicating data to and from the mobile terminal.

With this information it is possible to dynamically update the user interface on the mobile terminal depending on the proximity of a maintenance engineer to process control objects. When a maintenance engineer approaches a process control object, the mobile terminal he or she is carrying will then automatically update its display to present graphical representations of process control objects, such as icons. This includes, but is not limited to, showing the process control objects covered by a beacon on the mobile terminal display 34. The graphical representation of a process control object may then be provided with extended information such as real time values, object name, alarms as well as distance to the object from the mobile terminal etc. 10 15 20 25 30 10 According to aspects of the invention the process control system is covered by Bluetooth beacons, each transmitting unique beacon identi?ers. The positions of these beacons are known. Furthermore the transmissions of the beacons cover various areas or locations and also the process control devices covered by a beacon is known. Therefore there may exist a mapping between beacon identi?ers and process control objects in the database 20. This may be used in order to show graphical representations, such a icons IA and IB and face plates of process control objects to a user depending on location.

As the user enters the coverage of a beacon, such as the ?rst beacon coverage B1, the positioning element 41 receives the unique identi?er of this Beacon via the antenna 44 and radio circuit 42, step 70. Thereafter the positioning element 41 determines the location based on this detecting, step 72. It thus determines that the user is at a certain position of the facility 49 based on the received unique beacon identi?er and knowledge of the position of the beacon.

The determination may be a determination of the position in relation to the beacon 47 as well as in relation to the process control objects 24 OA and 26 OB covered by the beacon 47.

Thereafter the positioning element 41 investigates the mapping that exists between the beacon as identified by the unique beacon identi?er and process control elements in the database 2o, step 74. In the example of the ?rst beacon 47, the positioning element identi?es the ñrst and second process control objects OA 24 and OB 26 in this way. The presentation control element 43 is then informed about the identi?ed process control elements.

The presentation control element 43 then presents graphical representations IA and IB of the ?rst and second process control objects via the display, step 78. As can be seen in ?g. 6 also descriptions of the 10 15 20 25 30 ll objects, such as their names OA and OB as well as the distance of the mobile terminal 32 to the objects may be presented.

The presentation control element 43 may also receive alarms that are generated in the process control system. If an alarm is received, step 80, then it is automatically presented based on which process control object is affected. An alarm is only automatically presented based on the detection of the unique Bluetooth beacon. The alarm is thus automatically presented if the process control object for which the alarm is generated is associated with the detected beacon identity. It is thus presented if the location of the alarm is the same as that in which the mobile terminal is located, step 82.

The presentation is thus triggered by the fact that the mobile terminal is at the location of the process control object.

The presentation control element 43 then awaits an actuation of any of the displayed icons IA and IB.

If then an icon is actuated by the user 64, step 84, then the presentation control element 43 presents further data, step 84, which further data may be a face plate, process graphics or service history data.

What is imagined here is a mobile DCS system that is location aware. By giving the mobile terminal and the mobile DCS app the capability to know where the user is located and at the same time understand the position of the plant equipment it is possible to tailor the user interface of the mobile terminal to only show relevant information to the user.

Scenario: Lets imagine in a plant there are 1000 motors, the motors are all used to drive the process in the plant and the ?rst process control object is such a motor. A maintenance engineer, John Doe, has the task to shut down one of the motors OA and perform maintenance. Using a location aware mobile DCS app John grabs his mobile terminal and the tools needed for the maintenance and walks to the motor OA. When John 10 15 20 25 30 12 arrives at the motor he starts the mobile DCS app. As the app is location aware it will immediately display information about objects 24 and 26 that are close to Johns location, including the motor OA scheduled for service.

With a single click John selects the correct motor and then performs shutdown actions, before he starts the maintenance. Similarly once the maintenance is completed John again accesses the motor through the mobile DCS app and reactivates it. Worth noting in the above scenario is John never had to navigate through complex object hierarchies or huge tree structures to ?nd the motor scheduled for maintenance, remember the plant have 1000 installed motors, ?nding the correct one using “traditiona ” navigation most likely would have been time consuming.

Instead John simply opened the mobile DCS app and the correct motor was presented on the display, saving John lots of time and reducing the number of “clicks” needed to perform the desired action, to shut down the motor.

The problems needed to be solved to realize the scenario above are the following: - We need to know the physical location of the mobile device (and thus the user) - We need to know the physical location of all the equipment in the plant.

If we have this information we can use this in a mobile app to present only the equipment that is located physically close to the user on the mobile display. Thus reducing the need to search and/ or navigate complex or overwhelming lists of equipment.

There are many solutions for getting the mobile device position, such as GPS, cellular triangulation or Wi-Fi triangulation. However these solutions are not accurate enough, and they also have drawbacks that some do not work in indoor or underground installations. 10 15 20 25 30 13 The proposed solution is therefore to use Bluetooth beacons. Small inexpensive, often battery powered, devices that transmit a unique identi?er via Bluetooth. The core idea is that many of these Bluetooth beacons are installed at a site, during which their installation position is recorded, and what process equipment is in their range and saved in a database 20. Later we will utilize a mobile app which will listen for Bluetooth beacons, since the range for each beacon is limited (radius in speci?cation ~7o meters, but lab tests have shown more limited range of about ~25 meters) this means whenever a mobile terminal detects a Bluetooth beacon, it can estimate its own position, next the app will check a database (stored on mobile terminal, or on backend servers) for any associated equipment that is installed close to the beacon. Based on the database response the app can then display the equipment that is now known to be physically close to the mobile device (and thus the user).

The beacons are “dumb” units, i.e., they don't have any knowledge of their own location or of any equipment that might be around them. All the beacon does is to transmit a unique identi?cation tag or URL. There are right now 3 standards for Bluetooth beacons available. Apple iBeacon, Google Eddystone and the open AltBeacon standard. They have slightly different implementation specs, but in the end they are used in the same way, to send a message via Bluetooth and then it is up to the receiving device to ?gure out what to do with the received Bluetooth package.

“What you see is what you get”. The equipment you are standing in front of is also the equipment that is displayed in your mobile device. This is a new approach, bridging the digital and physical world.

This solves the problem of ?nding the “needle in the haystack”, i.e., ?nding the right equipment in a plant with thousands of objects while using the small display of a mobile terminal. 10 15 20 25 30 14 Some further advantages - Ef?ciency for Operators. Operators do not have to spend time navigating a small user interface searching for an object. Objects appear when operator are close to them, this will save time.

- Ease of use. This can be compared to “Google now” a system that fetch data it believes you will soon ask for. Our system in a sense does the same, but in an industrial setting.

- Safety. Whenever the mobile app detects a beacon it will know its location. This location can of course also be used by others, the mobile terminal could for example report its location to the control room, making sure the operators in the control room are always aware where ?eld operators are located.

Smart alarm notiñcations, sending alarm noti?cations only to personnel close to the alarming equipment.

Alarms should be able to be sent to operators in a “smart” way. When we know the position of each user in relation to the piece of equipment that is causing the alarm it is easy to send each alarm only to personnel that are close by, to avoid ?ooding all users with alarms. Of course the alarm can still be sent to the control room, but for mobile users this kind of ?ltering makes sense to reduce the “alarm stress”.

In the example above the alarm is sent to a Mobile Operator having the mobile terminal 32. However, it is possible that another mobile terminal, not being close to the process control object generating the alarm or causing the alarm to be generated may be able to see the alarm. The user of this other mobile terminal, while not receiving an alarm noti?cation on the mobile terminal, can still open an app and view any active alarms. 10 15 20 25 30 15 Another idea is to send alarms not to the closest mobile user but to the best quali?ed user. If all users skills and certi?cations are known, then it would be very simple to send only motor related equipment failures to users that have the necessary knowledge and correct certi?cations.

Now a second aspect of the invention will be described with reference being made to ?g. 8, which shows a second variation of method steps in the method.

The user 64 of the mobile terminal 32 may typically be a maintenance engineer performing some activity in the premises.

The maintenance engineer 64 may at some instance in time need to go to a speci?c process control object such as the ?rst process control object 24.

In for instance the case of a fault on the ?rst process control object 24 it may be necessary to inspect it.

The positioning element 41 may obtain the position of the mobile terminal 32. This position may be obtained via the wireless network WN and the Bluetooth beacons in the previously described way. Based on the knowledge of the location of all the beacons, it is then possible to guide the user towards a desired beacon based on being in the coverage of a current beacon. The position of the mobile terminal 32 may thus be obtained through knowledge of which beacon it is in contact with.

The user of the ?rst mobile terminal 32 is initially in some other location of the premises than the coverage of the ?rst beacon.

The guiding element 46 may now receive an indication or a noti?cation, for instance in the form of a work order, perhaps from the server 18, about a problem associated with the ?rst process control object 24. It may thus receive an indication that the ?rst process control object OA 24 needs 10 15 20 25 30 16 inspection, step 88. In order to be able to inspect the object the user 64 is then guided towards the object.

For this reason the guiding element 46 may guide the user 64 to the location where the ?rst process control object 24 is located, step 90.

The guiding element 46 may more particularly create guiding instructions for guiding the user 64 to the vicinity of the ?rst process control object, which in this case is to the coverage B1 of the first beacon. The guiding instructions for the user 64 may for instance be based on the original location of the ?rst mobile terminal 32 and comprise a number of instructions guiding the user 64 from this original location to the vicinity of the beacon coverage B1.

The guiding instructions may furthermore be forwarded to the presentation control element 43. Guiding instructions may for instance be forwarded one by one as new beacon coverages are entered.

The presentation control element 43 then presents the guiding instructions to the user 64 for guiding him or her to the beacon coverage B1. The guiding data typically comprises instructions on how to ?nd the ?rst process control object. The guiding instructions may thus provide directions. These directions may furthermore be dynamically updated based on the position of the user.

The position determining element 41 then determines that the location has been reached and at the same time determining the process control elements of the location based on identifying the Bluetooth beacon identi?er, step 92.

The signal strength of the communication between the mobile terminal and Bluetooth beacon 47 may also be used to determine the distance of a mobile station from the beacon, which gives a radius around the beacon at 10 15 20 25 30 17 which the mobile terminal may be located. This together with knowledge of the layout of the premises, such as where walls, ?oors and ceilings are provided and the positions of the ?rst and second process control objects, may be used for estimating the position of the mobile terminal in relation to the process control objects at the location.

If now the positioning element 41 ?nds that the mobile terminal 32 is close to the ?rst process control object OS 24, it may inform the information presentation element 43, which in turn informs the user of the activity to be performed, step 94, which informing is thus made when the user is adjacent the ?rst process control object 24.

The user may then perform the activity and when being ?nished con?rm that the activity has been performed. The information presenting element 43 may then receive the con?rmation, step 96, and thereafter stop informing the user of the activity.

In interviews with operators ?nding equipment is often being described as tricky, operators basically have to learn where equipment is installed, this learning process can be several years in large plants, and during these years not knowing exactly how to ?nd a speci?c requested equipment can be very stressful. Using Bluetooth beacons however it is possible to build something similar to “turn by turn directions” for operators, making it super simple to ?nd equipment, similar to the regular turn by tum.

What is proposed is a system to help locate industrial equipment, using Bluetooth beacons as tracking devices. The user may need to ?nd a speci?c equipment, such as the ?rst process control object 24, to shut the equipment down in preparation for maintenance work. The user has access to a mobile app which will help guide the user to the equipment.

The app uses the beacons already installed in the plant to know its approximate position. 10 15 20 25 18 Scenario: The user opens the app after entering the facility 49, the mobile app detects the beacon Zone B6 and can correctly position the user in a map. As the user moves forward the user will soon enter zone B1, the app will sense this and can then correctly update the user position on the map.

When the user is not in any Bluetooth zone, other sensors such as step sensor can be used to estimate the user position.

From interviews with operators it is known that operators have a tough time when they are supposed to ?nd equipment in the plant and do something with the equipment. Sometimes they need to switch on/ off a manual valve and sometimes they need to attach a lockout tag to a speci?c piece of equipment. Lockouts are used to indicate that equipment is unavailable due to for example maintenance. Operators have expressed that putting the lockout on the wrong piece of equipment could potentially be very dangerous, therefore they have to be super careful to put the lockout tag on the correct equipment. This puts a lot of stress on the operators, to be sure they put the lockout tag on the correct equipment.

Lets imagine the following scenario where the ?rst process control object is a valve: - A pipe needs to be closed (due to maintenance).

~ A work order has been created and is sent to one of the operators.

- The operator now needs to ?nd the correct valve and perform the close operation.

Digital tools could greatly aid the operator with the scenario above, imagine if the scenario with digital aid would function like this: A digital work order is sent to the operator.

- The operator can view the digital work order on both desktop computer as well as mobile terminal. 10 15 20 25 19 - The operator views the process control object info, where is it located, what equipment does it affect, how to disengage it, photos of the equipment etc...

- The operator picks up a toolbox and a mobile terminal and starts walking in the direction of the process control object.

- The mobile terminal is guiding the operator, helping the operator to know how to navigate to the process control object.

- When the operator arrives the mobile terminal will announce that the operator is now standing in front of the correct valve. Instructions on what to do can also be displayed on the mobile device.

- The operator disables the valve and puts the lockout tag in place.

~ The operator then con?rms on the mobile terminal that the lockout tag has been placed and can again verify the name displayed in the mobile app with the name on the physical device to be super sure that the correct unit has been disabled and tagged.

The solutions described above are all meant for making life easier for Operators. We have had several interviews with operators where they claim ?nding equipment is a problem for them. Also the lockout process is very stressful for them, to know they are locking out the correct equipment.

Today no aid is offered to operators performing these tasks.

- Ef?ciency for operators. Operators are guided to the equipment they need to work on, this will save time, thus making operators more ef?cient.

- Ease of use. No longer do operators have to manually remember how to find equipment. Instead they can rely on the digital tools for support. Imagine the impact this can make for new operators. 10 15 20 25 30 20 - Safety. Operators we have interviewed have described how they often have “a pain in the stomach” when they are supposed to close and tag out equipment, if they by mistake close and tag the wrong equipment this could lead to people getting injured. By introducing systems that guide the operators to the equipment location and which also tells them when they are standing next to the correct equipment.

The positioning unit, presentation control unit and guiding unit may, as was previously described, all be provided in the form of one or more processors together with computer program memory including computer program code for performing their functions. As an alternative they may be provided in the form of a Application Speci?c Integrated Circuit (ASIC) or Field-Programmable Gate Array (FPGA). This computer program code may also be provided on one or more data carriers which perform the functionality of the present invention when the program code thereon is being loaded into a presentation control server or a mobile terminal. One such data carrier 98 with computer program code 100, in the form of a CD ROM disc, is schematically shown in ?g. 9. Such computer program may as an alternative be provided on another server and downloaded therefrom into the presentation control server and/ or the mobile terminal.

The invention can be varied in many ways. It is for instance possible that a guiding unit is provided in the second embodiment but not in the ?rst. It is for instance possible that the positioning unit is provided in the presentation control server, while the presentation control unit is provided in the mobile terminal. It is also possible that the presentation control unit is provided in the presentation control server with the positioning unit being provided in the mobile terminal. The presentation control arrangement may therefore be split up with parts of it provided in the process control system, such as in the presentation control server and parts of it in the mobile terminal. In this way two devices, the server and the mobile terminal, together provide the arrangement. It can therefore be 21 seen that the present invention is only to be limited by the following claims.

Claims (10)

10 15 20 25 30 22 CLAIMS

1. A method of enabling a user (64) of a process control system (10) to obtain details of process control objects, the method being performed by a presenting control arrangement and comprising the steps of: - determining (72 ; 92) the location (B1) of a mobile terminal (32) of the user (64) based on detecting a unique identi?er of a Bluetooth beacon, - determining (76 ; 92) the process control objects (24, 26) in the location based on a mapping (74) of process control objects to Bluetooth beacons, and - presenting (78) graphical representations (IA, IB) of the process control objects on a display (34) of the mobile terminal (32).

2. The method according to claim 1, wherein graphical representations of the process control objects can be actuated for presenting further data and presenting (86) further data related a process control object based (84) on a user actuation of the graphical representation (IA) of the corresponding process control object (24).

3. The method according to any previous claim, further comprising receiving an indication (88) that a ?rst process control object needs inspection and guiding (90) the user of the mobile terminal to the ?rst process control object based on known positions of Bluetooth beacons in the process control system.

4. The method according to claim 3, further comprising informing (94) the user when being adjacent the ?rst process control object and about the actions to be performed.

5. The method according to any previous claim further comprising receiving (80) an alarm concerning a process control object at the location 10 15 20 25 30 23 and presenting (82) the alarm triggered by the mobile terminal also being at said location.

6. A data presentation control arrangement for enabling a user (64) of a process control system (10) to obtain details of process control objects, the data presentation control arrangement comprising: - a positioning unit (19; 41) con?gured to - determine the location of a mobile terminal (32) of the user based on detecting a unique identi?er of a Bluetooth beacon, and - determine the process control objects (24, 26) at the location based on a mapping of process control objects to Bluetooth beacons, and - a presentation control unit (21; 43) con?gured to - present graphical representations (IA, IB) of the process control objects on a display (34) of the mobile terminal (32).

7. The data presentation control arrangement according to claim 6, wherein the graphical representations of the process control objects can be actuated for presenting further process data and the presentation control unit (21; 43) is further con?gured to present further data related to a process control object based on a user actuation of the graphical representation (IA) of the corresponding process control object (24).

8. The data presentation control arrangement according to claims 6 or 7, further comprising a guiding unit (23 ; 46) con?gured to receive an indication that a ?rst process control object needs inspection and guide the user of the mobile terminal to the ?rst process control object based on known positions of Bluetooth beacons in the process control system.

9. The data presentation control arrangement according to claim 8, wherein the presentation control unit is further con?gured to inform the user when being adjacent the first process control object and about the actions to be performed. 24

10. The data presentation control arrangement according to any of claims 6 - 9, the presentation control unit being further con?gured to receive an alarm concerning a process control object at the location and present the alarm triggered by the mobile terminal also being at said location.