CODEWITHSUNDEEP
pythonplcsiemenssnap7
bader
bader

Reputation: 11

How to communicate Python with Siemens PLC using Python-snap7 and plcsim?

I used pycharm for writing my code and plcsim for simulatio. When I run my code and run plcsim I get an error. I used Tia portal V16 and s7-1200 and I want to communicate between S7-1200 and python-snap7 This is the error:

PS C:\Users\Badro\PycharmProjects\pythonProject1\venv> py test.py
b' TCP : Unreachable peer'
Traceback (most recent call last):
- File "C:\Users\Badro\PycharmProjects\pythonProject1\venv\test.py", line 8, in <module>
plc.connect(IP, RACK, SLOT)
- File "C:\Users\Badro\AppData\Local\Programs\Python\Python310\lib\site- 
packages\snap7\client.py", 
line 24, in f
check_error(code, context="client")
- File "C:\Users\Badro\AppData\Local\Programs\Python\Python310\lib\site- 
packages\snap7\common.py", 
line 89, in check_error
raise RuntimeError(error)
RuntimeError: b' TCP : Unreachable peer'enter code here

and this is my code:

import snap7

IP = '192.168.100.100'

RACK = 0
SLOT = 1
plc = snap7.client.Client()
plc.connect(IP, RACK, SLOT)

print(plc.get_cpu_state())

I watched this videohttps://www.youtube.com/watch?v=BKnK4AT_WKs

Where is the problem or is the problem that plcsim must be the real plc for simulation not plcsim?

Upvotes: 1

Views: 4288

Answers (2)

Guido
Guido

Reputation: 1

I have PLCSIM V13 SP1 and have tested your program and it works. I think you need to install NetToPLCSim which allows you to connect to the Plc to test your application using the network interface of the PC running the simulation. It is recommended that you run NetToPLCSim as an administrator.

Upvotes: 0

George Betsis
George Betsis

Reputation: 450

PLCSIM cannot simulate a network interface on simulated PLCs.

You have to install PLCSIM Advanced V3.0, which also simulates the network interface for each simulated PLC.

Upvotes: 0

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