March 23, 2019, 08:59:52 AM
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 I/O Communication problem wiith PLC

Author Topic:  I/O Communication problem wiith PLC  (Read 722 times)

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September 27, 2018, 07:23:03 PM
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Dalin


Hi guys,,,
I wired up the io from my PLC IO blosk to the 1TW board in the E-series controller, but cant establishh the connection.
The teach pendent shows "Error I/O board is not installed"....no inputs or outputs in the ladder logic is able to communicate withe the robot controller...... :help: :help: :help: :help: 

Today at 08:59:52 AM
Reply #1

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September 27, 2018, 09:49:14 PM
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kwakisaki

Global Moderator
Welcome to the forum.......... :beerchug:

1. Check 1TW board has correct address on SW1 switch (I think all off for no.1 board).
2. Check also Aux 0611 and make sure correct IO has been allocated (32 Inputs and 32 Outputs).

September 28, 2018, 01:36:21 PM
Reply #2
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Dalin


First of all, Thank you for replying man...

yes i changed them to 32 inputs and 32 outputs and all the dip switches down.
Now the errors are gone and there are no alarm lights(red) on the boards, but the communication problem still persists...

September 28, 2018, 02:20:38 PM
Reply #3
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kwakisaki

Global Moderator
If the 1TW has now been configured and the errors are gone, then the controller will be communicating with the 1TW board now.
If you are not reading inputs on the controller or reading inputs on your PLC, then check your wiring on CN2 and CN4.

1TW boards come in different flavours (NPN and PNP).
1TW boards CN2 is outputs and CN4 is inputs (often mistaken for the other way around).
1TW board requires external 24V and 0V to be connected to CN2 and CN4 respectively (often overlooked).
1TW NPN and PNP configurations are illustrated in the External IO Manual for correct configuration.

If fieldbus option has been enabled, it is possible that the signals are not allocated to local IO - Check Aux 060801 for this.

October 01, 2018, 02:35:02 PM
Reply #4
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Dalin


Thanks...

Also, the signals set to arm ID board was from 1001,    8 signals. This limited the connection with the plc. I set these to a different set of signals. Now it is communicating with the PLC. :dance2: :dance2: :dance2:


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