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Chapter 5 Remote Interface Reference
Digital I/O Commands
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5
Digital I/O Commands
You may use the built-in digital I/O bits or port, one or more digital I/O
modules, or a multifunction modules with a DIO function. In the
following context, multifunction modules refer to those with a DIO
function.
•
The built-in digital I/O (control board) consists of four bits which can
be operated either independently as four bit channels (numbered 091
through 094) or as one 4-bit port (numbered 090).
•
The plug-in digital I/O modules and multifunction modules usually
consist of several 8-, 16-, and/or 32-bit ports. These ports can be
operated independently, which means one port can be used for output
operation, while others can be used for input. However, all bits within
a same 8-bit port are dependent. If one bit of a port is used for input
or output operation, then all other bits of the same port can only be
used for the same operation.
For a complete discussion of digital I/O operation refer to “Digital I/O
Operation” on page 95.
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