Fluctuations in AI points

2016-03-21View Original

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The ECS-700 system has recently experienced temperature fluctuations (fluctuations in the temperature signals from PT100 thermoresistors), while other AI, DO, AO, and DI signals are normal； The indication signal of the PT100 after 248 temperature cycles is normal ； Both control stations appeared simultaneously, with varying amplitude of fluctuations (in one DCS room, the room temperature was normal). What causes fluctuations at all temperature points (PT100)? After receiving the resistance value signal, the AI731 card performs conversion calculations and sends the results to the main control card, which then transmits them to the operation panel via the network. Is the signal after conversion with AI731 the same as that of AI711?

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Fluctuations in AI points

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