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Appendix C Using the Digital Port
Digital Input
Fault Output
200
Each of the seven pins can be configured as digital input only. The
ground reference for the input pins is Signal Common on pin 8.
The In field of the Digital I/O window reflects the condition of the
external signal that is applied to the pin. The pin state is not affected
by the value of the binary output word.
From the front panel:
To configure the digital input function, press the Menu key, scroll
down and select the Utilities item, then select Digital I/O. Then
press Enter. The Digital I/O window will appear as previously shown
under "Bi-directional Digital I/O".
Select the pin you wish to configure from the Pin dropdown list.
Select the Digital In function from the Function dropdown list. Select
and program the remaining pins in the same manner.
Configure the polarity for each pin by selecting the Polarity
dropdown menu. Select either Positive or Negative. Select and
program the remaining pins in the same manner.
The Data fields only apply to the Digital I/O and Digital In functions.
The In field reflects the condition of the external signal that is
applied to the pins.
From the remote interface:
To configure the digital input function for pin 1:
DIG:PIN1:FUNC DINP
To configure the pin polarity to positive for each pin:
DIG:PIN1:POL POS
To read the data on the digital input pins:
DIG:INP:DATA?
Pins 1 and 2 can be configured as a fault-output pair. The Fault Out
function lets a fault condition on any output generate a fault signal
on the digital port. The following conditions will generate a fault
event: over-voltage, over-current, over-temperature, inhibit signal,
power-fail condition, or on some models, a power-limit condition.
When this function is selected, both pins 1 and 2 are dedicated to this
function. Pin 1 is the Fault output; pin 2 is common for pin 1. This
provides for an optically-isolated signal. Pin 2 should be connected to
the ground of your external circuit. Pin 2's selected function is
ignored. The Fault output signal will remain latched until the fault
condition is removed and the protection circuit is cleared (see
chapter 3, "Configuring Protection Functions").
Model N6705 User's Guide
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