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Configuration using the WBM
7.3 The menu items of the WBM
Network ports
In the "Network ports" area, you can enable/disable access to the communication module via
DCP.
Clear the "Allow write access" check box if you want to ensure that no access to the
communication module takes place via DCP. This setting prevents access to the
communication module, for example, via PST.
SNMP
In the "SNMP" area, you can enable/disable the network protocol. "SNMP" is a protocol for
monitoring network components.
This setting is activated at the factory. If you do not use the protocol, we recommend that
you disable the setting for security reasons.
Table 7- 6
Property
Community string
(reading)
Community string
(writing)
Allow write access
NTP
In the "NTP" area, you can enable the network protocol. "NTP" is a protocol for
synchronizing the time in network systems.
When supplied from the factory this setting is disabled and it needs to be enabled here
before using NTP for the first time.
Table 7- 7
Property
IP address of the
NTP server x
Update interval
in seconds
Accept time from
unsynchronized
NTP server
70
Description of the SNMP properties
Description
Input box for specifying the user name for read access to SNMP varia-
bles.
Input box for specifying the user name for write access to SNMP varia-
bles.
In this box, changes can only be made if write access was permitted.
Write access is only possible for the SNMP variables "sysName", "sys-
Location" and "sysContact" of the "system" group of MIB-2.
Check box to enable/disable write protection for SNMP variables.
Description of the NTP properties
Description
Text box for entering the address of the NTP server from which the
connected communication module synchronizes its time.
Up to four NTP servers can be specified to compensate possible server
failures.
Input box for specifying the intervals at which the communication mod-
ule automatically synchronizes its time.
Check box to ensure that the communication module also accepts the
time from unsynchronized NTP servers.
Operating Instructions, 12/2019, C79000-G8976-C578-01
SIMATIC RF166C
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