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4 Using the Regenerative Power System
Fault Output
Pins 1 and 2 can be configured as a fault-output pair. The Fault Output function enables a fault
condition to generate a protection fault signal on the digital port. Refer to
Protection
for a list of protection signals.
Both pins 1 and 2 are dedicated to this function. Pin 1 is the Fault output; pin 2 is the common for pin
1. This provides for an optically-isolated output. The polarity of pin 1 can also be configured. When the
pin polarity is POSitive, a fault condition causes the isolated output to conduct. Note that the Fault
output signal remains latched until the fault condition is removed and the protection circuit is cleared.
as explained under
Clear Output
Pin 2's selected function is ignored. Pin 2 should be connected to the ground of the
external circuit.
Front Panel Menu Reference
Select System\IO\DigPort\Pins.
Select pin 1, then Function, then Fault Out.
In the Polarity field, select either Positive or Negative.
Inhibit Input
Pin 3 can be configured as a remote inhibit input. The Inhibit Input function lets an external input signal
control the output state of instrument. The input is level triggered. The signal latency is 5
microseconds. Pin 8 is the common for pin 3. The following non-volatile inhibit input modes can be
programmed:
LATChing - causes a logic-true transition on the Inhibit input to disable the output. The output will
remain disabled after the inhibit signal is received.
LIVE - allows the enabled output to follow the state of the Inhibit input. When the Inhibit input is true,
the output is disabled. When the Inhibit input is false, the output is re-enabled.
OFF - The Inhibit input is ignored.
To configure the Inhibit Input function:
Front Panel Menu Reference
Select System\IO\DigPort\Pins.
Select pin 3, then Function, then Inhibit In.
In the Polarity field, select either Positive or Negative.
Select Protect\Inhibit.
Select either Latching or Live.
To disable the Inhibit signal, select Off.
150
Protection.
To configure the Fault function:
DIG:PIN1:FUNC FAUL
To select the pin polarity:
DIG:PIN1:POL POS
To select the Inhibit function:
DIG:PIN3:FUNC INH
To select the pin polarity:
DIG:PIN3:POL POS
To specify the Inhibit mode:
OUTP:INH:MODE LATC
OUTP:INH:MODE LIVE
OUTP:INH:MODE OFF
Keysight RP7970 & RP7980 Series Operating and Service Guide
Programming Output
SCPI Command
SCPI Command
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