In industrial automation, many measuring units are transmitted by analog signals. The most frequently adopted range for the signals are voltage -10V ~ 10V and current -20mA ~ 20mA. To use the analog signals as the parameters for PLC operations, you have to convert them into digital values first. For example, the voltage -10V ~ 10V is first converted into values -32,000 ~ +32,000 by an A/D module, and the PLC will read/write the control registers (CR) in the A/D module. The signals sent back to the PLC for operations will be digital K-32,000 ~ K32,000.
DVP04AD-E2 analog signal input module receives external 4 points of analog input signals (voltage or current) and converts them into 16-bit digital signals. The Main Processing Unit (MPU) can read/write the data in the module by using FROM/TO instructions or D9900~D9999 in the program. You can select voltage input or current input by the wiring. Range for voltage input: ±10V (±32,000). Range for current input: ±20mA (±32,000).