Delta AH500 Manual page 225

Ch a pt er 6 Tem per at u r e M eas ur em ent M o d u le A H 04T C / AH 08T C
(9) The error codes
Description
(10) Performing/Not performing the PID algorithm
(11) The automatic tuning
Bit 0~bit 7: The signals received by CH0~CH7 exceed the range of inputs
which can be received by the hardware.
Bit 15: The external voltage is abnormal.
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