User guide

132 Rev. 5
Remote Interface Reference
Error Messages
• -203,”Query interrupted”
A new query was processed before the return string of a previous query
had been completely transmitted to the host. The new query clears the
remaining data and replaces it with the new return string.
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
was active. A quench condition must be cleared via the
RESET QUENCH
SHIFT-key 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 104 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
430 Programmer is corrupted. Contact an Authorized AMI Technical
Representative for further instructions. Do not continue to use the Model
430 Programmer to operate a superconducting magnet.
• -402,”Serial framing error”
The baud rate of the Model 430 Programmer and host device are not
identical. The host device must be set to the same baud rate as the Model
430 Programmer (115200).
• -403,”Serial parity error”
The number of data bits and/or the parity of the Model 430 Programmer
and the host device are not identical. The host device must be set for the