Eddelweiss
Member
Hi. I have an OMRON PLC CJ1M (cpu 13) with an analog module MAD42. This is my first time working with OMRON PLCs and im having a hard time understanding the manual for it.
What im trying to do is send a current signal in the form of 4 to 20 mA from the output 1 of the analog mad42 card to a vfd. Basically im using the 4-20 to control the frequency of the vfd.I also need to send a 0 to 10 V signal from a sensor to the input 1 of the analog mad42 card.
So far i have enabled the all the analog channels, i have set my output to give 4-20 mA and my input to give 0-10 V. The problem now is how to i actually write the ladder program for that and also how to do the scaling so that the plc can send and receive the correct signals. Ive read the scaling chapter in the manual but im not sure if i should set my 4mA to 0000(hex) or to just 0 in decimal, or should i just leave it at 4. Any help will be greatly appreciated.
Thank you in advance
What im trying to do is send a current signal in the form of 4 to 20 mA from the output 1 of the analog mad42 card to a vfd. Basically im using the 4-20 to control the frequency of the vfd.I also need to send a 0 to 10 V signal from a sensor to the input 1 of the analog mad42 card.
So far i have enabled the all the analog channels, i have set my output to give 4-20 mA and my input to give 0-10 V. The problem now is how to i actually write the ladder program for that and also how to do the scaling so that the plc can send and receive the correct signals. Ive read the scaling chapter in the manual but im not sure if i should set my 4mA to 0000(hex) or to just 0 in decimal, or should i just leave it at 4. Any help will be greatly appreciated.
Thank you in advance