SolarNinja
Member
First I would like to thank you for taking the time to read.
I am using an AB CompactLogix L43-C with an IF4/A Analog input module and a Dwyer differential pressure transmitter. We are using this system to monitor velocity of air through a duct as part of our spark detection/fire suppression system. I have the IF4 set for 4-20mA input with a 50Hz noise filter and the percentage based output setting. My Dwyer unit is set to send a 20mA signal at 19,279 CFM, and a 4mA signal at 0 CFM. My question is this:
Will the analog input module (with these settings) automatically assign the value 0(%) to a 4mA signal, or do I need to program an algorithm to make a 4mA signal from the Dwyer unit produce a value of 0%?
What output will the analog input module send to the PLC if the mA signal going into it is 0?
Thank you all so much,
Monte
I am using an AB CompactLogix L43-C with an IF4/A Analog input module and a Dwyer differential pressure transmitter. We are using this system to monitor velocity of air through a duct as part of our spark detection/fire suppression system. I have the IF4 set for 4-20mA input with a 50Hz noise filter and the percentage based output setting. My Dwyer unit is set to send a 20mA signal at 19,279 CFM, and a 4mA signal at 0 CFM. My question is this:
Will the analog input module (with these settings) automatically assign the value 0(%) to a 4mA signal, or do I need to program an algorithm to make a 4mA signal from the Dwyer unit produce a value of 0%?
What output will the analog input module send to the PLC if the mA signal going into it is 0?
Thank you all so much,
Monte