Siemens SIMATIC MV500 Operating Instructions Manual page 215

Scope of performance of the optical reader as an SNMP agent
The optical reader supports data query in the following SNMP versions:
• SNMPv1 (standard)
For the optical reader, only SNMP variables from the following MIBs are supported:
• LLDP-MIB
• Standard MIB II (according to RFC1213)
– Group "System"
– Group "Interfaces"
Write access is permitted only for the following MIB objects of the "System" group:
• sysContact
• sysLocation
• sysName
For all other MIB objects / MIB object groups, only read access is possible for security reasons.
Traps are not supported by the optical reader.
Access permissions using community names
The optical reader uses the following community strings to control the access rights to the
SNMP agent:
Table 9- 62
Type of access
Read access
Read and write access
NOTICE
Change community string
Note that the default community string is generally known and therefore does not provide
effective protection.
To make sure that no unauthorized persons can access the device, we recommend that you
change the community string when the device is first set up.
SIMATIC MV500
Operating Instructions, 03/2021, C79000-G8976-C494-05
Access rights in the SNMP agent
Process interfacing via an automation system (PLC, PC)
Default community string
public
private
9.9 SNMP
215