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ATR421 4-20mA
Posted: 28/02/2022, 8:20
by khoa1005
Hi, im have atr421-12abc-t and plc siemens 314c-2dp. I had connected pt100 to analog input of plc and i want to show the value of pt 100 in atr421. I already set the sensor type in atr421 to 4.20mA and connected atr421 to analog output of plc. But the atr421 show the error 5. So how can i fix that error? Thank you so much!
Re: ATR421 4-20mA
Posted: 28/02/2022, 10:34
by Pixsys tecnico 6
Good morning,
In which PIN of the ATR421 did you connect the analog output of the PLC?
Best Regards
Re: ATR421 4-20mA
Posted: 28/02/2022, 13:10
by khoa1005
Pixsys tecnico 6 wrote:Good morning,
In which PIN of the ATR421 did you connect the analog output of the PLC?
Best Regards
Thank for your reply. I connect pin 11 and 12 of atr421 to analog output of plc.
Re: ATR421 4-20mA
Posted: 28/02/2022, 14:31
by Pixsys tecnico 6
Okay, it's correct.
Have you checked with a tester to see if there is current from the PLC analog output?
Best Regards
Re: ATR421 4-20mA
Posted: 01/03/2022, 0:48
by khoa1005
Pixsys tecnico 6 wrote:Okay, it's correct.
Have you checked with a tester to see if there is current from the PLC analog output?
Best Regards
Yes i checked with a tester there's current output from plc.
Re: ATR421 4-20mA
Posted: 03/03/2022, 9:45
by Pixsys tecnico 6
Good morning,
The only setting you will need to do in the ATR421 is the following:
- Par.2 [SEn.1] > "4-20" Analogue input configuration
- Par.4 [Lol.i.] > AI1 lower limit range, only for linear.
- Par.5 [uP.L.I] > AI1 upper limit range, only for linear.
By setting these parameters and connecting the analogue output of the PLC to the input of the ATR421 you should read the 4-20ma signal.
If you still can’t read the 4-20ma signal, can you send me a data sheet or PLC model? Thank you
Best Regards