How To Respond To a Checksum Error Cha
ter Six: Remote O
eration
80
How To Respond To a Checksum Error
A checksum error message indicates the controller has detected a calibration problem. The
controller send a checksum error message in the following circumstances:
•
at system power up
•
in response to the
R52
checksum command (1 = error)
If the controller detects a checksum error, perform a full calibration to correct the problem.
To perform a full calibration:
1. Zero the analog set point.
Perform the steps described in
How To Zero the Analog Set Point
, page 77.
2. Learn the analog set point full scale.
Perform the steps described in
How To Learn Analog Set Point Full Scale
, page 77.
3. Calibrate the span of the A/D converter.
Perform the steps described in
How To Calibrate Span of the A/D Converter
, page 79.
If the checksum error persists after you perform a full calibration, the error indicates a hardware
failure of the EEPROM. Contact any MKS Service Center, listed on the inside back cover of this
manual, for assistance.
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