16 cannot use remote communications commands, Service – American Magnetics 4Q06125PS-430 High Stability Integrated Power Supply System User Manual

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Rev. 5

Service

Troubleshooting Hints

5.2.16 Cannot use remote communications commands.

1. Verify your communications cable integrity and wiring. Refer to

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. 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 .

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.

On power-up, when connecting via Ethernet (Internet Protocol), the

Model 430 will display the firmware version screen until an IP

address has been obtained. On busy or slow networks, IP address

assignment may take several seconds (even as much as a minute or