Marius2

model of current transformer CS-SD420L

Hello, Now iam working with naked V570 HMI and v200-18-E4XB snap module + expansion module IO-ATC8. I got some problems with IO-ATC8 analog inputs. In my setup iam use current transformer http://www.ecproducts.co.uk/productdetail.asp?cat=24&item=4&pid=2135. Current transformer output is 4-20mA , so IO-ATC8 range of data iam using is 3277-16383 hardware configuration "normal mode", tumbler settings for current aquistion. My goal is show current value in HMI display, but there are some probems. Real values i getting is 2027-4323 ( these numbers not evry time the same). One time after restart of PLC ( power on/off) i saw good range 3277-16383. But after another restar input values changed 2027-4323. I dont know what to do, because same type transformer working in another el. cabinet, it connected to HMI snap input, range 819 to 4095. It works but some times snap input not working properly ( after resets), then i need turn of plc and wait, after aproximetly 30min input starts work fine. Hardware setting adjusted for current input. I measure transformer output it works fine. Waiting for Help. Best regards,