Engineering via SICAM WEB
SICAM RTUs, User Manual SICAM CMIC
245
DC8-001-2.09, Edition 08.2016
The processing time can be extended due to:
•
Number of communication connections (to further automation units, control system)
•
Number of I/O modules on the TM-Bus
•
Conditional program calls
•
Diagnosis and error handling
•
Test- and commissioning functions such as status and simulation of inputs/outputs
•
Saving the application program (download)
•
Change of parameters online
The processing time of the application program is displayed on the user interface (online)
under
PLC
|
Diagnosis
.
Timeout
The processing time must not be greater than the cycle time. If the maximum processing time
successively exceeds 50% of the set cycle time five times, then the cycle time is increased by
50% independently by the system. Simultaneously an error information is set.
5.2.1.4.2 Spontaneous Program Execution
For faster reaction times, the application program can be executed spontaneous (event-
controlled). This must be defined in the startup part of the IL (
PLC_RESET
).
Possible events are:
•
Status change of a data point from the periphery
•
Status change of a data point from the communication
The spontaneous program execution is enabled in the IL by setting the variable
PLC_SINGLE
to
1
(single run).
Example:
PLC_RESET:
LD 1
ST PLC_SINGLE
(*set single run*)
With a spontaneous program execution the entire application program is processed one time.
If an event occurs, the spontaneous program execution is first started after the current pro-
gram execution has completed (the application program cannot interrupt itself). The reaction
time can therefore be delayed accordingly.
If several events occur at the same time or one after the other just when the application pro-
gram is running, then the states are temporarily stored in a ring and processed chronologically
with the next spontaneous program execution. The same is also valid if a data point changes
its state several times (transient storage).
Summary of Contents for SICAM CMIC
Page 8: ...Preface 8 SICAM RTUs User Manual SICAM CMIC DC8 001 2 09 Edition 08 2016 ...
Page 46: ...Installation 46 SICAM RTUs User Manual SICAM CMIC DC8 001 2 09 Edition 08 2016 ...
Page 62: ...Interfaces and Circuitry 62 SICAM RTUs User Manual SICAM CMIC DC8 001 2 09 Edition 08 2016 ...
Page 102: ...Preparing the Engineering 102 SICAM RTUs User Manual SICAM CMIC DC8 001 2 09 Edition 08 2016 ...
Page 334: ...Error Handling 334 SICAM RTUs User Manual SICAM CMIC DC8 001 2 09 Edition 08 2016 ...
Page 404: ...Use Cases 404 SICAM RTUs User Manual SICAM CMIC DC8 001 2 09 Edition 08 2016 ...
Page 414: ...Glossary 414 SICAM RTUs User Manual SICAM CMIC DC8 001 2 09 Edition 08 2016 X Z ...