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Diagnostics and upkeep
5.1 Diagnostics
The information on the properties of SNMP-compliant devices is entered in MIB files (MIB =
Management Information Base).
You will find detailed information on SNMP and the Siemens Automation MIB in the
"Diagnostics and Configuration with SNMP" manual, see /3/ (Page 66).
For information on disabling SNMP, see section Disabling SNMP via data record (Page 42).
Range of performance of the CM
The CM supports the following SNMP versions:
• SNMPv1
Traps are not supported by the CM.
The CM supports the following MIBs:
• MIB II (acc. to RFC1213)
The CM supports the following groups of MIB objects:
– System
– Interfaces
– IP
– ICMP
– TCP
– UDP
– SNMP
• LLDP MIB
• MRP Monitoring
• Siemens Automation MIB
Write permissions
Write access is permitted only for the following MIBs and MIB objects:
• Siemens Automation MIB, group "System"
The group returns status information about the CM interfaces.
Write access is permitted only for the following MIB objects:
– sysContact
– sysLocation
– sysName
• MRP Monitoring, object "mrpDomainResetRoundTripDelays"
A write command "resetDelays(1)" to the object sets the values of
"mrpDomainRoundTripDelayMax" and "mrpDomainRoundTripDelayMin" to zero.
For all other MIB groups and objects, only read access is possible for security reasons.
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Operating Instructions, 04/2023, C79000-G8976-C355-05
SIMATIC CM 1542-1
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