The FMD88-10, FMD1616-10 and F2424 PLC supports 0-5V of Analog outputs which be converted to two channels of 0-20mA analog output using the AN20MA-2.
Assuming variable D may contain values between 0 and 10000 (0.00% to 100.00%) and you want to convert the corresponding value to 4 to 20mA.
1) The output X has to be between (4/20*4096 = 819) and (20/20*4096 = 4096)
So: D/10000 = (X - 819)/(4096-819)
=> X = D*3277/10000+819
2) Formula: SETDAC n, 819+ D*3277/10000
Verify:
When D = 0 => SETDAC n, 819 ' n is the DAC output channel
When D = 5000 => SETDAC n, 2457
When D = 10000 => SETDAC n, 4096
