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Communication among different computers gives rise to a load divided among the
communication link itself and the main CPU of the involved computers. This must be
considered when you design a distributed control system.
A basic rule, always relevant, is to limit the frequency of the information transfer to what is
really needed by the application. Event-controlled transfer (if possible to execute in a secure
way) is preferred to cyclic transfer.
The main CPU is always loaded by a communication. The significance depends on the actual
design. For the MasterBus 300, there are two different implementations in Advant
Controller 450. One utilizes the main CPU on the processor board and another utilizes a
dedicated slave processor on the submodule carrier. The latter represents a significantly lower
load to the main CPU (but higher cost). The same information applies to MasterBus 300E.
The variants of implementation are designated with respect to the implementation:
•
MasterBus 300 (executed in main CPU).
A submodule carrier with no slave processor support is normally used (SC510).
•
MasterBus 300 (executed in slave CPU).
A submodule carrier with slave processor support is used (SC520).
The application is in no way affected by the selection.
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No restrictions in location of submodule and submodule carrier in controller subrack.
Use leftover slot on a submodule carrier provided the carrier is suitable to the actual submodule,
see
and Guidelines below.
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•
You cannot mix MasterBus 300 (executed in main CPU) and MasterBus 300 (executed in
slave CPU) within the same controller.
•
From a cost viewpoint, submodule carrier SC510 is preferable.
You can use other type, SC520, however you cannot mix two Masterbus 300 (executed in
main CPU) on the same carrier SC520.
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•
You cannot mix MasterBus 300 (executed in slave CPU) and MasterBus 300 (executed in
main CPU) within the same controller.
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•
You cannot mix MasterBus 300E (executed in main CPU) and MasterBus 300E (executed
in slave CPU) within the same controller.
•
From a cost viewpoint, submodule carrier SC510 is preferable.
You can use other type, SC520, however you cannot mix two Masterbus 300E (executed in
main CPU) on the same carrier SC520.
Summary of Contents for Advant Controller 450
Page 1: ...Advant OCS with Master software GYDQW RQWUROOHU User s Guide 3BSE 002 415R701 Rev A ...
Page 26: ...Advant Controller 450 User s Guide Table of Contents 3BSE 002 415R701 Rev A xvi ...
Page 30: ...Advant Controller 450 User s Guide Table of Contents 3BSE 002 415R701 Rev A xx ...
Page 488: ... GYDQW RQWUROOHU 8VHU V XLGH SSHQGL DUGZDUH 0RGXOHV A 48 3BSE 002 415R701 Rev A ...
Page 508: ...Advant Controller 450 User s Guide Appendix D Item Designations D 12 3BSE 002 415R701 Rev A ...
Page 518: ...Advant Controller 450 User s Guide Appendix F Load Calculation F 4 3BSE 002 415R701 Rev A ...
Page 522: ...Advant Controller 450 User s Guide Appendix G Memory Calculation G 4 3BSE 002 415R701 Rev A ...
Page 528: ...Advant Controller 450 User s Guide Appendix H Halt Codes H 6 3BSE 002 415R701 Rev A ...
Page 562: ...Advant Controller 450 User s Guide Index iv 3BSE 002 415R701 Rev A ...
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Page 564: ...3BSE 002 415R701 Rev A March 2000 ...