Siemens CM 1542-1 - SNMP Performance and Write Permissions

Diagnostics and upkeep
5.2 SNMP
CM 1542-1
38 Operating Instructions, 07/2019, C79000-G8976-C355-04
You will find detailed information on SNMP and the Siemens Automation MIB in the manual
"Diagnostics and Configuration with SNMP" that you will find on the Internet:
/3/ (Page 50)
Range of performance of the CM
The CM supports the following SNMP versions:
●
SNMPv1
Traps are not supported by the CP.
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
A set sysName is sent as the host name using DHCP option 12 to the DHCP server to
register with a DNS server.
● 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.