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maersk · Member 3 Joined: 17 Aug 2014 Posts: 891

Monitoring and Control of Network Components with a SIMATIC S7-PN CPU with the aid of SNMP
https://support.industry.siemens.com/cs/document/57249109/monitoring-and-control-of-network-components-with-a-simatic-s7-pn-cpu-with-the-aid-of-snmp
SNMP blocks for SIMATIC S7-PN CPUs for monitoring, controlling and configuration of SNMP capable network components.
SNMP is a protocol that has established itself due to its modularity and versatility as a standard for the network management. Among the central tasks of a network management are monitoring of network components (network-, configuration-, status information and statistic data) the control and configuration of network components.

These functions should also be made possible for SIMATIC S7 CPUs.
The diagram below shows a network where the S7 CPU controls different network components.

Monitoring and Control of Network Components with a SIMATIC Monitoring and Control of Network Components with a SIMATIC

Monitoring and Control of Network Components with a SIMATIC Monitoring and Control of Network Components with a SIMATIC

The library "LSnmp" includes the following core blocks:
"SnmpGet" block for request of a SNMP variable
"SnmpGetNext" block for request of a sequence of SNMP variables
"SnmpGetBulk" block for request of SNMP variables in blocks
"SnmpSet" block for writing of SNMP variables
"SwitchIO" block for control and request of the digital IO of a SCALANCE W

The use of the SNMP blocks is shown in in detail on two application examples.
Application example 1 for the reading and writing of SNMP variables.
Application example 2 for the sending of SNMP traps.

https://support.industry.siemens.com/cs/attachments/57249109/57249109_Library_SNMP_S7_CPU_DOKU_V3_en.pdf
https://support.industry.siemens.com/cs/attachments/57249109/57249109_SNMP_LIB_CODE_V3_0.zip
https://support.industry.siemens.com/cs/attachments/57249109/57249109_SNMP_LIB_CLASSIC_V2_0.zip
ex1
https://support.industry.siemens.com/cs/attachments/57249109/57249109_SNMP_S7_RW_DOKU_V3_0_en.pdf
https://support.industry.siemens.com/cs/attachments/57249109/57249109_SNMP_RW_CODE_V3_0.zip
ex2
https://support.industry.siemens.com/cs/attachments/57249109/57249109_SNMP_Traps_DOKU_v2_0_en.pdf
https://support.industry.siemens.com/cs/attachments/57249109/57249109_SNMP_Traps_CODE_V20.zip
https://support.industry.siemens.com/cs/attachments/57249109/snmp_traps_code_v55_v1_0.zip