Agilent Technologies 6626A, 6628A manual Conditions for Generating a Service Request, Commands Sent

The ability to generate service requests can be enabled or disabled using the SRQ command as described below.

To disable the service request capability, except for power-on, send:

SRQ 0

To enable the service request capability for all output faults, send:

SRQ 1

To enable the service request capability for errors, send:

SRQ 2

To enable the service request capability for both faults and errors, send:

SRQ 3

The Power-On Service Request. You can also cause the power supply to request service every time it is switched on or every time there is a temporary loss in power. To do this send the following command:

PON 1

If you want to disable this facility, send the command.

PON 0

If you want to find out if the power-on SRQ is enabled or disabled, send the following query:

PON?

and address the supply to talk. The supply will respond with a 1 or 0 as discussed above.

Note	The power-on (PON) SRQ mode is stored in the non-volatile memory of the supply so that although the
	supply may be switched off, it will remember the status of the last PON command at power-on and
	respond accordingly.

Table 5-7 summarizes all the conditions under which a service request will be generated.

Table 5-7. Conditions for Generating a Service Request

Condition

∙Any

∙Power-on

∙Error

∙Fault

Commands Sent

PON	SRQ
0	0
1
	-

-2 or 3

-1 or 3

State of

RQS Bit

0

1

1

1

Reprogramming Delay

The power supply may switch modes or become unregulated momentarily after a new output value is programmed. Because of their short duration, these cases may not ordinarily be considered a fault but the supply will recognize this deviation and generate a fault signal. To prevent this, the reprogramming delay feature is implemented.

80Remote Operation