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All global objects are identified (and accessed) by unique names which you define within an
application project. Certain objects are given default names by the system, which you can
change later. From the system’s point of view, the name structure is flat. However, since a name
is a visible ASCII string, you can implement any kind of structure in naming objects.
Names are introduced in a controller via data base elements representing the actual object.
In general, the designation (connection NAME) on the data base element must be unique in the
controller. Designations referred to from an operator station via a Control Network must also be
unique in the total process control system connected to that network.
When defining signals, it is important that the signals be given names which are well considered
and will not have to be changed at some later stage.
With auto-generation of a PC-diagram, the signal names are printed in the diagram. This is the
reason for providing the signals with plain language names, even with a stand-alone controller.
The philosophy behind the naming of the signals is to also be applicable to calculated signals.
As an example, the values provided by two level transducers are averaged to give a calculated
signal. The physical signals are named LT 104A and LT 104B and the calculated signal is
named LT 104.
The designation philosophy for objects in the process control system must be established when
the signals are named. (Following relevant standards.) The designations should preferably be
hierarchic so that objects and signals are given associative names.
A feedback control loop for level control named LICA 104 (LICA = Level Indication Control
Alarm) is an example.
The PID controller object is assigned the name LICA 104 while the actual value (the feedback
signal) is suitably designated LT 104 (LT = Level Transmitter) and the controller output value
LV 104 (LV = Level Valve). These names are obtained from one of the standards for
designations in process industries, ISO 3511.
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Содержание Advant Controller 450
Страница 1: ...Advant OCS with Master software GYDQW RQWUROOHU User s Guide 3BSE 002 415R701 Rev A ...
Страница 26: ...Advant Controller 450 User s Guide Table of Contents 3BSE 002 415R701 Rev A xvi ...
Страница 30: ...Advant Controller 450 User s Guide Table of Contents 3BSE 002 415R701 Rev A xx ...
Страница 488: ... GYDQW RQWUROOHU 8VHU V XLGH SSHQGL DUGZDUH 0RGXOHV A 48 3BSE 002 415R701 Rev A ...
Страница 496: ...Advant Controller 450 User s Guide Appendix C Delivery Documentation C 2 3BSE 002 415R701 Rev A ...
Страница 508: ...Advant Controller 450 User s Guide Appendix D Item Designations D 12 3BSE 002 415R701 Rev A ...
Страница 514: ...Advant Controller 450 User s Guide Appendix E Current Consumption and Heat Dissipation E 6 3BSE 002 415R701 Rev A ...
Страница 518: ...Advant Controller 450 User s Guide Appendix F Load Calculation F 4 3BSE 002 415R701 Rev A ...
Страница 522: ...Advant Controller 450 User s Guide Appendix G Memory Calculation G 4 3BSE 002 415R701 Rev A ...
Страница 528: ...Advant Controller 450 User s Guide Appendix H Halt Codes H 6 3BSE 002 415R701 Rev A ...
Страница 561: ...Advant Controller 450 User s Guide Index 3BSE 002 415R701 Rev A iii V Valve control 1 102 VT100 terminal 1 105 ...
Страница 562: ...Advant Controller 450 User s Guide Index iv 3BSE 002 415R701 Rev A ...
Страница 563: ......
Страница 564: ...3BSE 002 415R701 Rev A March 2000 ...