Introduction to PLC Analog Signal Input Modules
In industrial automation, analog signals play a crucial role in transmitting measuring units. The Delta DVP-04AD-S module converts external analog input signals into 14-bit digital values for PLC operations. With voltage input ranging from -10 to 10V and current input from -20 to 20mA, this module ensures precise data conversion and control. Learn about the features and functionality of analog signal input modules in PLC systems for efficient automation processes.
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Presentation Transcript
Delta DVP-04AD-S The A/D Conversion In industrial automation, many measuring units are transmitted by analog signals. The most frequently adopted range for the signals are voltage -10 ~ 10V and current -20 ~ 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 -10 ~ 10V is first converted into values -8,000 ~ +8,000 by an A/D module, and the PLC will read/write the control registers (CR) in the AD module by FROM/TO instructions. The signals sent back to the PLC for operations will be digital K-8,000 ~ K8,000.
Features: DVP04AD (or DVP06AD) analog signal input module receives external 4 (or 6) points of analog input signals (voltage or current) and converts them into 14-bit digital signals. The CPU can read/write the data in the module by using FROM/TO instructions in the program. There are 49 16-bit control registers in the module. You can select voltage input or current input by the wiring. Range for voltage input: 10V ( 8,000, resolution: 1.25mV). Range for current input: 20mA ( 4,000, resolution: 5 A).
