Siemens Commissioning PC Stations C79000-G8976-C156-07 - Manual (Page 141)

10 Example — SNMP Communication with OPC
141
Commissioning PC Stations - Manual and Quick Start
Release 5/2005
C79000-G8976-C156-07
10.4.3 Setting the Trap Recipient based on the Example of an
OSM/ESM
Writing Values
You set the trap recipient of an OSM/ESM by assigning suitable values to two OPC
items. The procedure described here is also an example of how to write values for
OPC items using the OPC Scout.
Maximum of Ten Trap Recipients
To specify the trap recipients, you use the variables snTrapAddress and
snTrapState. These variables each have ten instances (snTrapAddress1 to
snTrapAddress10 and snTrapState1 to snTrapState10). On the OSM/ESM, you
can therefore enter up to ten trap recipients. The device sends the trap frames to
all registered recipients.
Writing Values for snTrapAddress and snTrapState
Activity
1. In the left-hand window of the OPC Scout, the folder icon SNMP also contains a subfolder with
the configured connection name. This folder contains a group with trap variables. If you use the
profile supplied with the OSM, the name of this group is Privat-Common. If you use a newly
created profile, the trap variables are in the group specified for it.
Click on the symbol of the group with the trap variables to display a list of these variables in the
mid part of the window. The variable snTrapAddress contains the IP address of the trap
recipient, snTrapState specifies whether or not the entry is activated (2) or deactivated (3):
2. Select the snTrapAddress1 entry and select the menu command “Write value(s)” in the
context-sensitive menu. The dialog box for synchronous and asynchronous writing appears.