Siemens SIMATIC CC712 Operating Instructions Manual page 16

Application and functions
1.5 Configuration limits - communication
Connection resources over the process interface
● Number of connections to S7 stations
Max. 1 S7 connection to one S7 connection
● Number of connections to Modbus stations
Max. 10 connections to Modbus stations
● Number of connections to the configuration PC
Max. 1 HTTPS connection
Number of process data
● Tags in the data area of S7 CPUs
– Max. 500 tags
● Tags per S7 CPU
– Max. 500 tags
● Tags in the data area of Modbus stations
– Max. 100 tags per Modbus station
Connections over the Cloud interface
● Number of sessions with the broker
Max. 1 session
● Number of connections to OPC UA clients
Max. 10 simultaneous sessions with OPC UA clients
OPC UA server
As OPC UA server, the gateway supports the following quantity structure.
● Number of tags in the CPU data area
– Max. 500 symbols: / PLC tags
● Number of supported subscriptions
– Max. 5 subscriptions per session
– In total maximum of 50 subscriptions at the same time
● Number of items per subscription
– Max. 500 tags per subscription
– Max. 2500 tags over all subscriptions
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Operating Instructions, 05/2019, C79000-G8976-C503-01
SIMATIC CC712