American Magnetics 4Q1010PS-430 Integrated Power Supply System - Manual (Page 160)

142 Rev. 5
Service
Troubleshooting Hints
Note
Setup menu limits are always required in terms of current.
5.2.16 Cannot use remote communications commands.
1. Verify your communications cable integrity and wiring. Refer to
Table A-6 on page 153 and Table A-7 on page 153 for wiring of
remote communications connectors.
2. Check to make sure you are sending the correct termination to the
Model 430 Programmer. If you are using RS-232, make sure the
baud rate, number of stop bits, and data bits/parity settings of the
host device are matched to those of the Model 430 Programmer (see
section 4.3). If you are using Ethernet communications, check all
Model 430 Programmer network settings (see sections 3.10.4 and
3.10.5).
3. Check your host communications software and make sure it is
recognizing the return termination characters from the Model 430
Programmer. The return termination characters are <CR><LF>.
4. If the Model 430 Programmer is responding repeatedly with errors,
try a device clear command (DCL) or powering the Model 430
Programmer off and then back on. Be sure you are sending valid
commands.
5.2.17 Magnet current drifts unacceptably while PSwitch cooling
1. Set the PSwitch Cooling Gain to 25% and cool the switch. Observe
the current on the front of the Model 430 Programmer while the
persistent switch is cooling
2. If the switch will not lock (cool to superconducting), resulting in a
PSW lock error, reduce the PSwitch Cooling Gain by several
percent and attempt cooling the switch again.
3. If the switch cools but the magnet current has excessive drift
during cooling, increase the PSWitch Cooling Gain value by several
percent.
5.2.18 Model 430 appears to lock up when connecting to network
Note
If the IP Address Assignment value is changed, the Model 430
Programmer power must be cycled off for at least 15 seconds and
then back on to complete the change.