An error occurred during send TCP : Other Socket error (32)'

[martin2day2]

Hello,

i use a Pi with python to send data from my heatpump to my S7-300.
The program works good but after some hours of working i get an error:

Dec 10 14:34:09 raspberrypi python3[12962]: fehler
Dec 10 14:34:14 raspberrypi python3[12962]: b' ISO : An error occurred during send TCP : Other Socket error (32)'

this is how my program is looks like.

import snap7
...
self.plc = snap7.client.Client()
self.plc.connect("192.168.10.100", 0, 2)
...
def heater(self)
            wdata = bytearray(4)
            util.set_int(wdata, 0, self.grid_p)
            util.set_int(wdata, 2, int(self.actTemp_water * 10))
            try:
                self.plc.db_write(db_number=201, start=0, data=wdata)
            except:
                print('fehler')
            time.sleep(5)

Please help me to get my code work.
What does the fault mean?

Have a nice day
Martin

[spreeker]

The try - except now does not print the pull stack trace and error.

use logging.exception like here: https://stackoverflow.com/questions/4508849/how-to-log-python-exception

import logging 
def foo():
    try:
        some_code()
    except:
        logging.exception('')

with out more information it is hard to debug? how often do you send water temperature?

[martin2day2]

Hello,

okay i change the code.
Today i get enother error:

Dec 12 15:26:43 raspberrypi python3[26512]:     self.run()
Dec 12 15:26:43 raspberrypi python3[26512]:   File "/usr/lib/python3.9/threading.py", line 892, in run
Dec 12 15:26:43 raspberrypi python3[26512]:     self._target(*self._args, **self._kwargs)
Dec 12 15:26:43 raspberrypi python3[26512]:   File "/home/martin/app.py", line 61, in heater
Dec 12 15:26:43 raspberrypi python3[26512]:     self.plc.db_write(db_number=201, start=0, data=self.wdata)
Dec 12 15:26:43 raspberrypi python3[26512]:   File "/home/martin/.local/lib/python3.9/site-packages/snap7/client/__init__.py", line 24, in f
Dec 12 15:26:43 raspberrypi python3[26512]:     check_error(code, context="client")
Dec 12 15:26:43 raspberrypi python3[26512]:   File "/home/martin/.local/lib/python3.9/site-packages/snap7/common.py", line 89, in check_error
Dec 12 15:26:43 raspberrypi python3[26512]:     raise RuntimeError(error)
Dec 12 15:26:43 raspberrypi python3[26512]: RuntimeError: b' ISO : An error occurred during recv TCP : Connection timed out'

i have allready an try befor the self.plc.db_write(db_number=201, start=0, data=self.wdata)...
What can i do here?

Martin

[spreeker]

Hi, I see you use threading which complicates things. The connection is lost which can happen on a network / wifi connection. Some cleanup must probably be done before (re) connection. On network failure sleep a few seconds and try again later. - Probably A new connection must be build to the PLC on connection loss. I do not know enough of you code and context. Every x time you do an update also a new connexion is needed. Now I assume one connection is made and used for ours and is lost. If you make and close a connection each time this is probably more reliable. Cheers, Stephan.

…

On Tue, Dec 12, 2023, 16:30 martin2day2 ***@***.***> wrote: Hello, okay i change the code. Today i get enother error: Dec 12 15:26:43 raspberrypi python3[26512]: self.run() Dec 12 15:26:43 raspberrypi python3[26512]: File "/usr/lib/python3.9/threading.py", line 892, in run Dec 12 15:26:43 raspberrypi python3[26512]: self._target(*self._args, **self._kwargs) Dec 12 15:26:43 raspberrypi python3[26512]: File "/home/martin/app.py", line 61, in heater Dec 12 15:26:43 raspberrypi python3[26512]: self.plc.db_write(db_number=201, start=0, data=self.wdata) Dec 12 15:26:43 raspberrypi python3[26512]: File "/home/martin/.local/lib/python3.9/site-packages/snap7/client/__init__.py", line 24, in f Dec 12 15:26:43 raspberrypi python3[26512]: check_error(code, context="client") Dec 12 15:26:43 raspberrypi python3[26512]: File "/home/martin/.local/lib/python3.9/site-packages/snap7/common.py", line 89, in check_error Dec 12 15:26:43 raspberrypi python3[26512]: raise RuntimeError(error) Dec 12 15:26:43 raspberrypi python3[26512]: RuntimeError: b' ISO : An error occurred during recv TCP : Connection timed out' i have allready an try befor the self.plc.db_write(db_number=201, start=0, data=self.wdata)... What can i do here? Martin — Reply to this email directly, view it on GitHub <#480 (reply in thread)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAAOSMLXXBGFTDFU6BDKLNDYJB2BTAVCNFSM6AAAAABAOSRKBSVHI2DSMVQWIX3LMV43SRDJONRXK43TNFXW4Q3PNVWWK3TUHM3TQMZSGIYTM> . You are receiving this because you commented.Message ID: ***@***.***>