Engineering via SICAM WEB
SICAM A8000 / CP-8000 • CP-8021 • CP-8022 Manual Unrestricted 433
DC8-037-2.02, Edition 10.2017
Variable name Meaning Format
PLC_SYSERROR_024 Protocol 3 fault BOOL
PLC_SYSERROR_025 Protocol 3 communication fault BOOL
PLC_SYSERROR_026 Protocol 3 failure BOOL
PLC_SYSERROR_027 Protocol 3 communication failure BOOL
Example:
PLC_START:
LD PLC_SYSERROR_005 (*sum error warning if bit = "1"*)
ST M_BOOL_ERROR005 (*store in a flag*)
You find the description of the system variables in the manual SICAM RTUs Common Func-
tions System and Basic System Elements, chapter "Automation", section "Restricted
Open-/Closed-Loop Control Function", "Variables", "System Variables".
9.2.1.6 Command Processing According to IEC 60870-5-101/104
If a command (Activation, ACT) is generated by the controller and output on a I/O Master
Module, then the messages for command acknowledgement (ACTCON) and command termi-
nation (ACTTERM) are generated with the corresponding output address of the control.
If the output address of the control is the same as the input address, then both messages are
automatically transmitted again to the control.
If an ACT remains in the control (target = control, no periphery), then an ACTCON, ACTTERM
that is to be possibly simulated can be generated in 1 cycle pass. For this the cause of trans-
mission for the command must be set to 0 and the spontaneous bit to 1. Then one ACTCON
and one ACTTERM respectively will be transmitted.
Example:
LD 0
ST 0_045_001_001_001.COT
LD 1
ST 0_045_001_001_001.S
If this function is not used, the ACTCON and ACTTERM can also be generated individually (for
this at least 2 cycle passes are required).
Note
The corresponding typ identification can be generated by means of Verwendung of utilization of the com-
mand "with/without time" (for instance TI 45/TI 58).
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