LOGO connectivity about python-snap7 HOT 9 CLOSED

I think you forgot to connect, run client.connect() after the set_connection_params().

look here:

http://python-snap7.readthedocs.org/en/latest/client.html#snap7.client.Client.set_connection_params

If that didn't help, can you examine the python logging output? prepend this to your script:

import logging
logging.basicConfig(level=logging.DEBUG)

from python-snap7.

The revised script:
client = snap7.client.Client()
print repr(client)
x = client.set_connection_params('192.168.99.192', 0x0100, 0x0200)
print repr(x)
client.connect('192.168.99.192', 1, 0 )
y = client.get_connected()
print repr(y)

Output:
INFO:snap7.client:creating snap7 client
<snap7.client.Client object at 0x2b02a10> handle
None
INFO:snap7.client:connecting to 192.168.99.192 rack 1 slot 0
DEBUG:snap7.common:error text for 0xa006e
ERROR:snap7.common: ISO : An error occurred during recv TCP : Connection
timed out
Traceback (most recent call last):
File "step7.py", line 58, in
client.connect('192.168.99.192', 1, 0 )
File "/usr/local/lib/python2.7/dist-packages/snap7/client.py", line
21, in f
check_error(code, context="client")
File "/usr/local/lib/python2.7/dist-packages/snap7/common.py", line
56, in check_error
raise Snap7Exception(error)
snap7.exceptions.Snap7Exception: ISO : An error occurred during recv
TCP : Connection timed out

client.connect requires a port and slot, I thought that would not work
with LOGO 0BA7 ?

On 02/05/2014 02:36 AM, Gijs Molenaar wrote:

I think you forgot to connect, run client.connect() after the
set_connection_params().

look here:

http://python-snap7.readthedocs.org/en/latest/client.html#snap7.client.Client.set_connection_params

If that didn't help, can you examine the python logging output?
prepend this to your script:

import logging
logging.basicConfig(level=logging.DEBUG)

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#6 (comment).

Stan Yankoo
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are you sure it is the right IP? it just looks like that address is just not responding. can you ping the IP?

from python-snap7.

Yes I can ping the IP and I can control the PLC at that IP using the
Snap7 GUI and libnodave.

On 02/06/2014 03:16 AM, Gijs Molenaar wrote:

are you sure it is the right IP? it just looks like that address is
just not responding. can you ping the IP?

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Stan Yankoo
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try:

client.connect('192.168.99.192', 0, 1 )

first one is the rack second one is the slot imho. the slot cannot be 0. we should add an error message for that.

from python-snap7.

I thought it was just the rack that could not be zero? Slot 0 works with
libnodave.

The Snap7 documentation says that connecting to a LOGO will not work
with rack/slot. It will only work with TSAP.

On 02/06/2014 08:15 AM, stephan preeker wrote:

try:

client.connect('192.168.99.192', 0, 1 )

first one is the rack second one is the slot imho. the slot cannot be
0. we should add an erro message for that.

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Stan Yankoo
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Well this library was written using an S400 PLC here on my desk I do not have a LOGO device. It would be very helpfull if you could narrow down what causes this and make a pull request, the library is not that big and just a wrapper around snap7 library. so if snap7 works this python libary should be able to work to!

from python-snap7.

Thanks Stephan, I'll keep working on it a bit longer. If I figure it out
I'll let you know.

On 02/06/2014 08:26 AM, stephan preeker wrote:

Well this library was written using an S400 PLC here on my desk I do
not have a LOGO device. It would be very helpfull if you could narrow
down what cause this. the library is not that big and just a wrapper
around snap7 library. so if snap7 works this python libary should be
able to work to!

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#6 (comment).

Stan Yankoo
1-416-573-7258 Cell
[email protected]

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hi stan4, any update on this issue? i've made a new 0.2 release that you can try.

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