Siemens SIMOCODE pro PCS 7

Description of the blocks
4.2 Diagnostics block MMDiag
SIMOCODE pro PCS 7 Library V9.0
Programming and Operating Manual, 06/2017, A5E40899442002A/RS-AA/001
99
4.2.8
Failure of a PROFIBUS DP station
The PROFIBUS connection error is reported at the BusFlt output of the MMDiag block and
as an alarm in WinCC.
Table 4- 9 Possible reasons for the connection error
Byte 0
Meaning
Reason or remedy
Bit 0 1: DP slave cannot be
accessed by the DP
master.
• DP slave cannot be accessed by the DP master.
• Is the station address of the DP slave set correctly?
• Is the bus connection plug connected?
• Is voltage applied to the DP slave?
• Is the RS 485 Repeater secured correctly?
• Has a reset been performed on the DP slave?
4.2.9
Malfunction when loading the OB
Interrupt OB 85 sets or resets the priority class error GrpErr (malfunction when loading OBs).
Table 4- 10 Events during which OB 85 GrpErr is reset
Fault
Event number
Event class
Error when creating a start event for an OB. This is not
loaded to the CPU.
16#A1, 16#A2 or
16#A3
16#35
Error when the operating system accesses a module.
16#B1, 16#B2
16#39
16#B3 16#39 or 16#38
GrpErr is only triggered once for one execution cycle of the block.