Voir la source de Common Issue - Initialising - Cannot Connect to PLC

{{Tuto Details
|Main_Picture=Common_Issue_-_Initialising_-_Cannot_Connect_to_PLC_Annotation_2020-02-24_102253.jpg
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|Description=<translate>Cannot connect to TwinCAT PLC on switch on</translate>
|Categories=Software
|Tags=TwinCAT, connection, plc, data
}}
<translate>=Symptom=
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Generally, this indicates a problem with the route between the front end and back end PC
<br />{{Idea|...First thing to try is a simple full power off and on again}}



<br />

=Potential Solutions=

===Back end PC not switched on===

===Customer Network===
If connected network on either front and back end PCs is not "Work" or "Private", this can block communication

===IP Address change===
If the back-end PC is not on a fixed IP address, and the route is set to connect to a specific IP address, then any change will lose the route connection

*Ensure the back end is on a fixed IP address (you will need to get an IP address from the customer's IT representative)
*or (if customer unable to provide fixed IP address) set the route to NDIS

Then set up the route again from the front end PC

<br />
===Back end PC Router Needs Clearout===
Log in to back end PC and clear all AMS routes out. This cleans out the system and then you can attempt to create the route again
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{| class="wikitable"
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!Step
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!Notes
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|1
|Teamviewer to back end PC and clear out existing routes

# Right click on the TwinCAT3  icon -> Edit routes
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|2
|Remove all existing Routes

Click on each one in turn and click remove
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|3
|Restart TwinCAT
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|4
|Log in to the front end PC and set up the route again
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