I have been monitoring processors via SNMP for a while now. I monitor loads of CP3s and MC3s and a few DIN-AP3s and DMPS3s. I know the documentation is not great. Although I don't have access to any PRO3s the OIDs seem to be consistent with each processor series. The same OIDs work for 4-series as well.
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The most useful ones I collect:
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CPU Load (0-100%) : OID 1.3.6.1.2.1.25.3.3.1.2.1
Firmware Version: OID 1.3.6.1.4.1.3212.6.1.2.3.1.0
Processor Model: OID 1.3.6.1.4.1.3212.6.1.2.1
System Uptime: OID 1.3.6.1.4.1.3212.7.2.3.2.7.1.2.1
Time Zone: OID 1.3.6.1.4.1.3212.11.5.11.5.0
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You can use snmpwalk to test what information the processor will report back, however SNMP is not enabled by default.
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To enable it I use EasyConfig in Toolbox > Functions > SNMP configuration
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You have to click Enable SNMP and then add a Manager IP. The processor will reboot twice. After that SNMP will work.
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Also I discovered that you need relatively recent firmware to get the most useful information from the Processor. On CP3s it has to be at least v1.6 or higher.
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Hope that helps.
Daniel?
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