When the SFC has been completed the return value RET_VAL indicates the number of
disables, i.e. the number of calls to the SFC 41 (processing of all alarm interrupts is only
enabled again when RET_VAL = 0).
Value Description
8080h The function was started in spite of the fact that the alarm interrupt had already been enabled.
14.1.33 SFC 43 - RE_TRIGR - Retrigger the watchdog
The SFC 43 RE_TRIGR (retrigger watchdog) restarts the watchdog timer of the CPU.
The SFC 43 has neither parameters nor return values.
14.1.34 SFC 44 - REPL_VAL - Replace value to ACCU1
The SFC 44 REPL_VAL (replace value) transfers a value into ACCU1 of the program
level that cause the fault. A call to the SFC 44 can only be issued from synchronous fault
OBs (OB 121, OB 122).
Application example for the SFC 44:
When an input module malfunctions so that it is not possible to read any values from the
respective module then OB 122 will be started after each attempt to access the module.
The SFC 44 REPL_VAL can be used in OB 122 to transfer a suitable replacement value
into ACCU1 of the program level that was interrupted. The program will be continued with
this replacement value. The information required to select a replacement value (e.g. the
module where the failure occurred, the respective address) are available from the local
variables of OB 122.
Parameters
Parameter Declaration Data type Memory block Description
VAL INPUT DWORD I, Q, M, D, L,
constant
Replacement value
RET_VAL OUTPUT INT I, Q, M, D, L The return value contains an error code if an error
is detected when the function is being processed.
RET_VAL (Return value)
Value Description
0000h No error has occurred. A replacement value has been entered.
8080h The call to the SFC 44 was not issued from a synchronous fault
OB (OB 121, OB 122).
14.1.35 SFC 46 - STP - STOP the CPU
The SFC 46 STP changes the operation mode of the CPU to STOP.
RET_VAL (Return value)
Description
Parameter and return
values
Description
Description
VIPA SPEED7
Integrated Standard
System Functions > SFC 46 - STP - STOP the CPU
HB00 | OPL_SP7 | Operation list | en | 18-30 682
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