Mode 2 for readbacks. 1 maskLoopback Remote loopback. 2 maskSynchFrame Setpoint frames sent. Sync frames being sent. 3 maskDataValid Data is not valid.
Data is valid.
4 maskEnable Disable. Some power supplies do not provide a loopback, in which case the WFG should be configured to provide local loopback by setting the maskLoopback bit of the link control register, as descibed above. During initialization, the DMA address is specified by the WFG firmware.