User`s guide

RIGOL Chapter 2 Front Panel Operations
2-34 M300 User’s Guide
Digital Input
The multifunction module has four non-isolated 8-bit digital input/output (DIO) ports
which you can use as digital output ports (refer to “Module Control
”) and digital
input ports. When used as digital input ports, you can read the real-time status of
each bit of the ports and read the digital signal automatically by configuring the DIO
channels into the scan list via the channel configuration guide (or press Control and
use the left/right direction keys to select the multifunction module and the press
Config).
DIO channel configuration guide includes “Measurement Configuration”, “Alarm
Configuration” and “Advanced Configuration”. For alarm configuration, refer to
“Alarm Configuration”. This section introduces the parameters to be set in
“Measurement Configuration” and “Advanced Configuration” for the DIO channels.
1 Chan No.
Enter the first step of the channel configuration guide. Use the up/down
direction keys to select Chan No. and use the numeric keyboard to input or use
the left/right direction keys to select the desired channel number. Generally, the
DIO channels are numbered “S01” to “S04” where S denotes the slot number of
the multifunction module.
2 Function
After selecting the correct channel number, Function is fixed to “DIO” and
users cannot modify it.
3 Status
Use the up/down direction keys to select Status and use the left/right direction
keys to select the desired status.
 READ: configure the current DIO channel to the scan list. At this point, this
channel can only be used as a digital input port. During a scan, the
instrument can read the digital signal of this channel.
 OFF: do not configure the current DIO channel to the scan list. At this point,
this channel can be used as both digital input (you can read the digital input
signal of this port manually) and digital output port (you can edit the digital
output signal of this port). Please refer to the introduction in “To Control
MC3534”.
4 Bits
Use the up/down direction keys to select Bits and use the left/right direction
keys to select the desired number of bits. Channels “S01” to “S04” are all 8-bit
ports. You can configure the 4 channels to be independent 8-bit channels. You
can also combine “S01” and “S02” as well as “S03” and “S04” respectively and
configure them to 16-bit. Finally, all 4 channels can be combined and configured
to be 32-bit input.