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Chapter 5 Remote Interface Reference
Digital I/O Commands
5
Digital Configuration Commands
These commands set the digital I/O handshake mode, handshake line
polarities, and data line polarities. The port parameter is in the form
snn, where s is the slot number and nn is the first channel on the digital
port. The port parameter is plug-in module dependent. Valid port
numbers for each plug-in module are shown beginning on page 70.
SOURce:DIGital
:MODE <port>,<mode>
:MODE? <port>
This command sets the handshake mode to use. Five handshake modes
are available and are specified as an integer from 1 to 5. See “About Flow
Control Modes (Handshake)” on page 98. The modes are shown below.
Only the first port on a digital I/O module can be set to mode #3, mode
#4, or mode #5. When set to modes 3, 4, or 5, the three control lines are
valid for the port used. Other ports on the same module can be used in
modes #1 or #2 (the three control lines do not apply to these ports).
This command cannot be used with the built-in 4-bit digital I/O port.
The SOURce:DIGital:MODe? query returns an integer ranging from 1
to 5.
Mode
Number
Handshake
Mode
Definition
Notes
1 Static mode #1 Default handshake mode.
2 Static mode #2 Read what was written.
3
Read or Write
strobe
If you set a port to this mode, you cannot use the
port in a scan list or use card pairing
(
ROUTe:CPAir
).
4
Read and write
strobe
If you set a port to this mode, you cannot use the
port in a scan list or use card pairing
(
ROUTe:CPAir
).
5 Full handshake
If you set a port to this mode, you cannot use the
port in a scan list or use card pairing
(
ROUTe:CPAir
).
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