Smw98: Expansion I/O Bus Communication Errors - Siemens SIMATIC S7 System Manual

D.17

SMW98: Expansion I/O bus communication errors

SMW98 gives you information about errors on the expansion I/O bus.
Table D- 18
S7-200 SMART
symbol name
EM_Parity_Err
S7-200 SMART
System Manual, V2.3, 07/2017, A5E03822230-AF
SMW98 Expansion I/O bus communication error counter
SM address Description
(Read/Write)
SMW98 The CPU increments this word each time the CPU detects a
parity error on the expansion I/O bus. Power cycling the CPU
clears the word or writing a zero to the word.
Special memory (SM) and system symbol names
D.17 SMW98: Expansion I/O bus communication errors
821