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User name Jack (Techs)
Log entry time 08:25:30 on May 20, 2009
Entry number 275025
Followups:
keyword=Right Arm Q1 power supply
This entry is for the work done yesterday on the Right Q1 power supply. I
connected the laptop to the supply using the usb to RS-422 adapter and
the serial cable from the Q1 spares drawers. It was clear the control
board itself was having a problem, not the EPICS interface. When given a
'return' key with nothing on the line it should respond with a '?' to
tell you it did not understand the command. It was responding with random
snipets of responses. Clearly some register had been corrupted. I set the
current to 0, the supply responded by ramping down. At 0A I pushed the
'Reset' button on the Control Board. This reloads the FPGA configuration.
The supply behaved correctly after that.