MKS 651C, Instruction Manual, Page: 94 / 172

How To Respond To a Checksum Error Chapter Six: Remote Operation
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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.