Chapter 5 Temperature Measurement Module AH04PT/AH08PTG (12) Performing/Not performing the PID algorithm (13) The automatic tuning (14) Refreshing the manual output values automatically 5-67 Bit 0~bit 7: The signals received by the CH0~CH7 exceed the range of inputs which can be received by the hardware. Bit 15: The external voltage is abnormal. Description