Can you setup multiple power supplies to all trigger on at once with a TTL trigger and then if there is a short that puts one supply into OCP mode that will then shutdown all the supplies instantaneously on power up? At this time I have understood that you can trigger all the supplies on at once and then program the devices to look for a backplane trigger to power off on an OCP event. This programming step after the supplies are on takes too long and does not protect the hardware for a short on power up.
Below are the commands to configure each power module such that when a OC, OV or OT condition occurs it will cause a FLT trigger.
OUTP:DFI:STAT 1
OUTP:DFI:LINK QUES
STAT:QUES:ENAB 19
You will also need to make sure that the switches of each power module is configured so that Remote Inhibit is enabled.