Siemens SIMATIC MV540 H - Page 168

Process interfacing via an automation system (PLC, PC)
9.8 SNMP
SIMATIC MV500
168 Operating Instructions, 06/2018, C79000-G8976-C494-01
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 Access rights in the SNMP agent
Type of access
Default community string
Read access
public
Read and write access private
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.