Special memory (SM) and system symbol names
D.10 SMW22-SMW26: Scan times
S7-200 SMART
808 System Manual, V2.3, 07/2017, A5E03822230-AF
SMW22, SMW24, and SMW26 contain information on the scan time. You can read the last
scan time, minimum scan time, and maximum scan time (millisecond values).
Table D- 7 SMW22-SMW26 PLC scan times
Scan time of the last scan.
Minimum_Scan SMW24
Minimum scan time recorded since entering the RUN mode or since resetting these
values from the PLC Information dialog.
Maximum_Scan SMW26 Maximum scan time recorded since entering the RUN mode or since resetting
these values from the PLC Information dialog.
SMB28-SMB29: Signal board ID and errors
SMB28-SMB29 byte addresses store the signal board type and error status.
SMW100-SMW110 System alarm codes (Page 822)
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