Poljachina
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Posts posted by Poljachina
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Hello all.
I have two Sambas at the workshop for an upcoming project. Up until yesterday everything worked fine. I was able to download the PLC and HMI changes that I made without problems. But yesterday something happened to one of the PLC's. I can't connect to it any more, the connection to the other works like before. The PLC works, but I cant download the changes that I need to make...
If I check in the info mode under the serial tab I just see that 1 byte is being sent and 1 received when I try to connect with Visilogic. Any ideas what to do to get the PLC working again?
Cheers
Aleix
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Hello.
Thanks for the tips @sgull, I will try to wire in series a amper meter to check.
I will make a drawing how I got things wired for better understanding of the situation.
@Flex727I checked the manual an wired as it is drawn. The manual says that the + from the 2 wire transmiter has to be wired to +24V (in my case INOR terminal 6) and connect the - from the transmitter (in my case INOR terminal 7) to the analog input. This is what I tried first and it didn't show any value on ma MI100 which is defined for the first analog input.
Best regards.
Aleix
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Hello all. Thanks for the input so far guys.
I checked the INOR output with an amp.meter and the Inor outputs around 8mA at room temp (24°C). I can't get my head around on how to wire the analog input of the PLC seeing that it only has one input terminal.
Do I connect the 6 terminal from the INOR to the 9 terminal of the PLC with the 24V and then the 24V GND to the 7 terminal of the INOR?
Cheers.
Aleix
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Hello.
Yes forgot the most important part, sorry about that. I am using the PLC SM35-J-R20 as you figured it out.
I did monitor the MI variable that I set up in the hardware configuration but it's always 0... That is why I am assuming that I didn't wire the transmitter to the PLCcorrectly.
Pin 9 is the correct one for the first analog input, right?
Cheers
Aleix
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Hello all. This is the first time I am working with a Unitronics PLC and would need some help regarding the wiring and configuration of the on-board analog input.
I have an INOR 2 wire transmiter that will transform a PT1000 temp value to 4-20mA signal that the PLC will read(see attached picture1).
So I set the jumper JP8 and JP9 to B so that analog input #0 is set to Current. Also configured analog input 0 to 4-20mA in VisiLogic.So I tried to wire the transmitter like it is drawn in the manual of the Samba PLC (manual page 8). Inor terminal 6 to +24 V DC, Inor terminal 7 to analog input of the Samba PLC (terminal 9).
But I don't get any value from the analog input. Have I missed something in the configuration of the PLC or most likely the wiring is not correct.
Any info would be great. Thank you in advanced.
Cheers Aleix.
Samba SM35-J analog input wiring/configuration question
in Vision & Samba PLC + HMI Controllers & VisiLogic Software
Posted
Hello all.
I have managed to make the analog input to work. There was indeed a problem with the wiring.
The correct wiring is +24V to 6 of the INOR and 7 of the INOR to the analog input of the PLC.
Thanks for the help.
Cheers
A