7BCOMMUNICATION IN SIMATIC S7
8.4.14 FB_ERR:= "DB_SIWA_U".bo_FB_ERR, output, BOOL
If an error has occurred in the processing of the block itself, this is reported via this
variable.
!
Warning
If a processing error occurs for FB SIWA_U, we have to assume that the variables
that have been output do not correspond with the actual status in the module.
8.4.15 FB_ERR_C:= "DB_SIWA_U".b_FB_ERR_CODE
The error number of the FB SIWA_U is output through this variable.
The following messages can be output:
Bit 1 - Error in the internal call of SFB52 or SFB53; the value RET_VAL is entered
in the DB in DW4 for a cycle
Bit 2 - Error interpreting a data record / command, specified data record or
command number is incorrect
Bit 3 - Error life bit; SIWAREX U is not responding
Bit 4 - Reserve
Bit 5 - Activated command was broken off due to a restart
Bit 6 - Reserve
Bit 7 - Reserve
!
Warning
If a processing error occurs for FB SIWA_U, we have to assume that the variables
that have been output do not correspond with the actual status in the module.
8.4.16 START_UP:= "DB_SIWA_U".bo_STARTING_UP
During the start-up of the control program in OB100, the variable RESTART is set
by the user. The FB_SIWA_U recognizes the set variable in the cyclical program,
sets the variable START_UP, and deletes, where appropriate, commands which
have not been processed internally. Then the FB resets the two variables
RESTART and START_UP and accepts new commands.
SIWAREX U 8-55
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