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  1. Dear All I'm facing a problem with Allen Bradley PLC System. We are using a redundant I/O and redundant controller configuration of Allen Bradley ControlLogix 5000 series. In one of the AI card, on channel 0, following configuration is made: Input type: 0 to 5V High Range: 5V High EU: 20,000 Low Range: 1V Low EU: 4000 There is a gas detector connected to this channel which is supplying 4-20mA. What I observe is that when we simulate this channel using our mA calibrator, the raw counts does not increase more than 10,000. Why it is happening? Why the raw counts are not going upto 20,000 as configured in the channel configuration. Any help will be appreciated.