Add a sample PLC which we can use to test couplers inside TSN network setups.

Beremiz/beremiz_network_test/a20_prod@opcua/baseconfnode.xml

+<?xml version='1.0' encoding='utf-8'?>
+<BaseParams xmlns:xsd="http://www.w3.org/2001/XMLSchema" IEC_Channel="1" Name="a20_prod"/>

Beremiz/beremiz_network_test/a20_prod@opcua/confnode.xml

+<?xml version='1.0' encoding='utf-8'?>
+<OPCUAClient xmlns:xsd="http://www.w3.org/2001/XMLSchema" Server_URI="opc.tcp://192.168.2.2:4840"/>

Beremiz/beremiz_network_test/a20_prod@opcua/selected.csv

+input,I2C0 / Relay 0,1,str,i2c0.relay0,Int32,0
+input,I2C0 / Relay 1,1,str,i2c0.relay1,Int32,1
+input,I2C0 / Relay 2,1,str,i2c0.relay2,Int32,2
+input,I2C0 / Relay 3,1,str,i2c0.relay3,Int32,3
+output,I2C0 / Relay 0,1,str,i2c0.relay0,Int32,0
+output,I2C0 / Relay 1,1,str,i2c0.relay1,Int32,1
+output,I2C0 / Relay 2,1,str,i2c0.relay2,Int32,2
+output,I2C0 / Relay 3,1,str,i2c0.relay3,Int32,3

Beremiz/beremiz_network_test/a20_prod_1@opcua/baseconfnode.xml

+<?xml version='1.0' encoding='utf-8'?>
+<BaseParams xmlns:xsd="http://www.w3.org/2001/XMLSchema" IEC_Channel="0" Name="a20_prod_1"/>

Beremiz/beremiz_network_test/a20_prod_1@opcua/confnode.xml

+<?xml version='1.0' encoding='utf-8'?>
+<OPCUAClient xmlns:xsd="http://www.w3.org/2001/XMLSchema" Server_URI="opc.tcp://192.168.3.2:4840"/>

Beremiz/beremiz_network_test/a20_prod_1@opcua/selected.csv

+input,I2C0 / Relay 0,1,str,i2c0.relay0,Int32,0
+input,I2C0 / Relay 1,1,str,i2c0.relay1,Int32,1
+input,I2C0 / Relay 2,1,str,i2c0.relay2,Int32,2
+input,I2C0 / Relay 3,1,str,i2c0.relay3,Int32,3
+output,I2C0 / Relay 0,1,str,i2c0.relay0,Int32,0
+output,I2C0 / Relay 1,1,str,i2c0.relay1,Int32,1
+output,I2C0 / Relay 2,1,str,i2c0.relay2,Int32,2
+output,I2C0 / Relay 3,1,str,i2c0.relay3,Int32,3

Beremiz/beremiz_network_test/beremiz.xml

+<?xml version='1.0' encoding='utf-8'?>
+<BeremizRoot xmlns:xsd="http://www.w3.org/2001/XMLSchema" URI_location="LOCAL://">
+  <TargetType/>
+</BeremizRoot>