Modbus TCP connection datakom d-200 mk2

[m.j.sorokin]

I checked with the debug code, previously I tried several times to connect and disconnect the modbus pull application (all timeouts by default), everything worked correctly, and I also ran the 'ping 10.36.0.25 -t' command on the laptop to track the network connection. I ran the script on logic machine, the script gave the following log:

DGU_modbus_tcp 24.02.2021 22:56:59
* arg: 1
* string: voltage values
* arg: 2
* number: 242.7
* arg: 3
* number: 242.8
* arg: 4
* number: 241.8
* arg: 5
* number: 0
DGU_modbus_tcp 24.02.2021 22:56:59
* string: [00][01][00][00][00][06][FF][03][28][00][00][08]
Waiting for a confirmation...
<00><01><00><00><00><13><FF><03><10><09><7B><00><00><09><7C><00><00><09><72><00><00><00><00><00><00>

DGU_modbus_tcp 24.02.2021 22:57:10
* string: modbus read failed Invalid data
DGU_modbus_tcp 24.02.2021 22:57:20
* arg: 1
* string: voltage values
* arg: 2
* number: 244.1
* arg: 3
* number: 241.1
* arg: 4
* number: 242.2
* arg: 5
* number: 0
DGU_modbus_tcp 24.02.2021 22:57:20
* string: [00][01][00][00][00][06][FF][03][28][00][00][08]
Waiting for a confirmation...
<00><01><00><00><00><13><FF><03><10><09><89><00><00><09><6B><00><00><09><76><00><00><00><00><00><00>

DGU_modbus_tcp 24.02.2021 22:57:30
* string: modbus read failed Invalid data
DGU_modbus_tcp 24.02.2021 22:57:41
* string: modbus read failed Operation timed out
DGU_modbus_tcp 24.02.2021 22:57:51
* arg: 1
* string: voltage values
* arg: 2
* number: 243.7
* arg: 3
* number: 243
* arg: 4
* number: 241.2
* arg: 5
* number: 0
DGU_modbus_tcp 24.02.2021 22:57:51
* string: [00][01][00][00][00][06][FF][03][28][00][00][08]
Waiting for a confirmation...
<00><01><00><00><00><13><FF><03><10><09><85><00><00><09><7E><00><00><09><6C><00><00><00><00><00><00>

DGU_modbus_tcp 24.02.2021 22:58:01
* string: modbus read failed Invalid data
DGU_modbus_tcp 24.02.2021 22:58:11
* string: modbus connect failed Operation in progress
DGU_modbus_tcp 24.02.2021 22:58:22
* string: modbus connect failed Operation in progress
DGU_modbus_tcp 24.02.2021 22:58:32
* string: modbus connect failed Operation in progress
DGU_modbus_tcp 24.02.2021 22:58:43
* string: modbus connect failed Operation in progress
DGU_modbus_tcp 24.02.2021 22:58:53
* string: modbus connect failed Operation in progress
DGU_modbus_tcp 24.02.2021 22:59:04
* string: modbus connect failed Operation in progress
DGU_modbus_tcp 24.02.2021 22:59:14
* string: modbus connect failed Operation in progress

ping was without a single timeout. But after stopping the script, I was no longer able to connect through the modbus poll program, the following error is returned: "Modbus/TCP Connection Failed.Connect Timeout.Open Command Prompt and ping the slave/server to verify the connection"

There were no ping problems during the entire check

---

after running the script again, the connection was also not restored and the device stopped responding to the ping command.