User`s guide

49
Chapter 2 Front-Panel Overview
To Read a Digital Input Port
4
2
To Read a Digital Input Port
The multifunction module (34907A) has two non-isolated 8-bit
input/output ports which you can use for reading digital patterns. You
can read the live status of the bits on the port or you can configure a scan
to include a digital read.
1 Select the Digital Input port.
Select the slot containing the multifunction module and continue turning
the knob until DIN is displayed (channel 01 or 02).
2 Read the specified port.
You can specify whether you want to use binary or decimal format. Once
you have selected the number base, it is used for all input or output
operations on the same port. To change the number base, press the
key and select USE BINARY or USE DECIMAL.
The bit pattern read from the port will be displayed until you press
another key, turn the knob, or until the display times out.
Note: To add a digital input channel to a scan list, press and select
the DIO READ choice.
01010101 DIN
Binary Display Shown
34970A Refresh UG.book Page 49 Wednesday, February 17, 2010 12:34 PM