94 Rev. 7
Remote Interface Reference
Error Messages
4.6.3 Execution Errors
-301,"Heating switch"
The user attempted to initiate a ramping function during the persistent
switch heating period. Ramping functions are disallowed during the
heating period.
-302,"Quench condition"
The user attempted to change the ramping state while a quench condition
is active. A quench condition must be cleared via the
5(6(7=(52 switch
or by remote command before the ramping state can be modified.
-303,"Input overflow"
The four input buffers are all occupied with unprocessed commands or
queries. The command or query is lost. Review the handshaking section on
page 74 for directions for avoiding input overflow errors.
-304,"Error buffer overflow"
More than 10 errors have occurred. For further errors to be recorded in the
internal buffer, at least one error must be cleared.
4.6.4 Device Errors
-401,"Checksum failed"
The non-volatile memory which stores the calibration data for the Model
420 is corrupted. Contact an Authorized AMI Technical Representative for
further instructions. Do not continue to use the Model 420 to operate a
superconducting magnet.
-402,"Serial framing error"
The baud rate of the Model 420 and host device are not identical. Both the
Model 420 and host device must be set to the identical baud rate.
-403,"Serial parity error"
The number of data bits and/or the parity of the Model 420 and the host
device are not identical.
-404,"Serial data overrun"
The received buffer of the Model 420 was overrun. Either switch to
software handshaking (XON/XOFF), or decrease the baud rate.
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