In practical applications, analog signal acquisition may experience data fluctuations or other phenomena due to inherent issues with the acquisition module, sensor, transmitter, or external environment. This article uses the EVE EM235 module to analyze the causes of some of these problems and lists relevant solutions.
1. Problem: Large fluctuations in channel readings
2. Problem: One channel reading is abnormal, while other channels are normal.
3. Problem: The voltage signal is normal on one channel, but the current signal is abnormal.
4. Problem: The analog value calculated by the CPU changes very slowly, and the refresh rate is slow.
5. Problem: The power indicator light is not on.
6. Problem: Channel reading is +32767
Problems encountered in analog signal acquisition are varied, and solutions may differ depending on the industrial control environment. In practical applications, a substitution method should be adopted to troubleshoot the fault step by step.
