West Control Solutions MRC 7000 Recorder Manual - Manual (Page 49)

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Momentary ER 70 - 1. May occur when incrementing or decrementing a
Controller unable to respond value. Error clears itself.
within 250 milliseconds
Momentary ER 71 - 1. Computer program must wait longer for a response
Byte received before the from the instrument.
response was transmitted
Momentary Er 72 - 1. Data received not valid, possible corruption on the
Incorrect Block Check comm line. Possible noise problems. Check baud
character was received rates, instrument addresses, line connections, and
termination.
Momentary Er 73 - 1. Check baud rate.
Byte received with incorrect 2. Possible noise problems. Check instrument
parity. addresses, line connections, and termination.