Digital inputs on the E-series controller

    Hello


    I've got the Kawasaki robot with a little one E-series controller. And there is something strange with its DI's. The controller has 1TW Source pnp board. So I'm trying to connect some pnp sensors in accordance with the attached scheme. (I'm using six DI's only, so I connected three sensors powered by an external 24v PSU to 1-6 pins and I also connected the minus from an external PSU to 18th pin. And there is something wrong happens next. Firstly, the only one DI works at the same time as I can see on the KIDE monitor... For example, if one of any of six connected DIs is triggered then it works and I can see that the DI is triggered by KIDE monitor. But when the two or more DI's are triggered at the same time, none of them works. I dont see they're triggered neither by KIDE monitor nor by print signal console command. Secondly, I also noticed that when one of any of six connected DI's triggers, the low voltage (about 13-16V) appears on the all of controller's DI pins even though they are not connected. I thought that the problem could be with the cable or something like that, but It seems OK from my side... What could be the reason of this sort of problem?..

    Quote from RainerFord

    so I connected three sensors powered by an external 24v PSU to 1-6 pins

    3 sensors to 6 pins......... :hmmm:

    Provide a schematic?

    What are the sensors, provide more information, including connection information?

    You sure your board is PNP and not NPN - What country are you in?

    Have you tried the other bank of 16 inputs using pin 19 as the 0v?

    Have you tried just simple toggle switches on the inputs instead?

    OMG... I'm sorry, of course I meant 6 sensors to 6 pins... :upside_down_face:

    The sensors are optex fa 16175 zr-qx200cp4

    The country is Kazakhstan and the I/O board has the "SOURCE/PNP" inscription on it, so i'm pretty sure it is PNP. I also tried to use simple toggle switches wich connects the DI pins to 24v. The result was the same.

    I didn't try to use other bank of 16 inputs, but I think it will be my next step.

    UPD:

    Just doublechecked the DI connector on the cable from sensors to Controller and noticed that the 18th pin was sinked down in the connector. So I think it didn't properly reach the contact in controller. I replaced the connector with the new one and the problem seems to be solved. Thank you.

    Edited once, last by RainerFord (July 25, 2023 at 6:54 AM).

    Quote from RainerFord

    OMG... I'm sorry, of course I meant 6 sensors to 6 pins... :upside_down_face:

    I'm getting old, but that left me scratching my head.... :hmmm:

    I was wondering whether you had used 3 sensor (9 wires) and wired them all across 6 DI's.

    Which could of caused many different results.

    But didn't want to question your wiring competency.

    Quote from RainerFord

    I thought that the problem could be with the cable or something like that, but It seems OK from my side...

    This is why I never suggested to double check it again as you seemed sure this was good.

    Quote from RainerFord

    UPD:

    Just doublechecked the DI connector on the cable from sensors to Controller and noticed that the 18th pin was sinked down in the connector. So I think it didn't properly reach the contact in controller. I replaced the connector with the new one and the problem seems to be solved. Thank you.

    The part number of the board should always be referenced to ascertain correct PNP/NPN format.

    Most times the supplier would ask about PNP or NPN requirements, but the country of supply would usually only order in the common type used for that region unless specified differently during the quotation stage.

    I have seen many times assumption that the 1TW is one and not the other which has caused similar issues to yours.

    Glad you have resolved it and thanks for feedbacking your results.......... :top:

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