Posted 28 Jul 2021 Hello. I have a system in which an A1S68AD card is used, that card has been damaged . I replace that damaged card with the new A1S68AD card with same wiring and same setting of dip switch. But at channel number 3 there is a RTD connected which gives 4-20 mA signal. But in Plc at channel number 3 the data register is showing -2400 fixed value all the time and in actual the temperature is varying. But PLC SHOWS FIXED VALUE OF -2400. PLEASE HELP ME OUT. Share this post Link to post Share on other sites
Posted 28 Jul 2021 Are you sure that transmitter isn't also blown? That value is suspiciously similar to what one would expect for 0mA. Share this post Link to post Share on other sites
Posted 2 Aug 2021 Yeah i have checked the transmitter with some other temperature controller it gives the correct readings . I want to ask that when the transmitter is connected to A1S68AD CARD why does it show -2400 value . Share this post Link to post Share on other sites
