Bruceson Posted May 11, 2020 Report Share Posted May 11, 2020 I am using a V350-35-R2 with a EX-D16A3-TO16 and a IO-ATC8 to run PID control on a simple heater. i am have a problem getting the PWM on the EX-D16A3-TO16 to work correctly . the issue appears to be with the operand of frequency. I'm not sure what I am doing wrong. i have attached a copy of the program. any help would be greatly appreciated. heater.vlp Quote Link to comment Share on other sites More sharing options...
MVP 2023 kratmel Posted May 11, 2020 MVP 2023 Report Share Posted May 11, 2020 Hi, you must use power on operand for frequency MI1=PWM freq . Now it is 0 and output is ON for all the time. PWM freq for this module is different for different type of connection PNP = 1-500Hz NPN =1-32000Hz You must use proper value for IO module hardware PWM Frequency power up value preset. If you process is slow - you do not need to run harware PWM. You can run slow software PWM SCAN ladder FB and use simple output for control SSR for heater. Quote Link to comment Share on other sites More sharing options...
Gabriel Franco Posted May 11, 2020 Report Share Posted May 11, 2020 You must set the frequency (MI1) according with your actuator capabilities and the IO specs. https://myzone-kza3sadj.netdna-ssl.com/wp-content/uploads/2015/12/IO-D16A3-TO16_TECH-SPEC_03-09.pdf Quote Link to comment Share on other sites More sharing options...
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