American Magnetics 420 Power Supply Programmer - Manual (Page 121)

Rev. 7 103
Service
Troubleshooting Hints
2. Check to make sure you are sending the correct termination to the
instrument. If you are using RS-232 or the RS-422 option, make
sure the baud rate, number of stop bits, and data bits/parity
settings match the setting of the host device. If you are using the
IEEE-488 option, check the primary address setting and make sure
the controller software is set to query the instrument at the
primary address selected.
3. Check your host communications software and make sure it is
recognizing the return termination characters from the instrument.
For RS-232 communication, the return termination characters are
<CR><LF>. For IEEE-488, the return message termination
characters are <LF> with EOI.
4. If the instrument is responding repeatedly with errors, try a device
clear command (DCL) or powering the instrument off and then
back on. Be sure you are sending valid commands.
If you experience continued trouble with the IEEE-488 interface, you may
have an incompatible IEEE-488 card in your host computer. In the past,
AMI has found subtle differences between manufacturers of IEEE-488
cards that have introduced communication errors. AMI attempts to
establish compatibility with as many products as possible, however it is
difficult to test every card available. Contact AMI directly if you have
thoroughly checked your setup and continue to experience problems with
the IEEE-488 interface.
5.3 Additional Technical Support
If the cause of the problem cannot be located, contact an AMI Technical
Support Representative at (865) 482-1056 for assistance. The AMI
technical support group may also be reached by Internet e-mail at
VXSSRUW#DPHULFDQPDJQHWLFVFRP . Additional technical information,
latest software releases, etc. are available at the AMI World Wide Web site
at:
KWWS ZZZDPHULFDQPDJQHWLFVFRP
Do not return the Model 420 or other magnet system components to AMI
without prior return authorization.