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DigitalI/OPorts
The DMP128 provides twenty (20) digital I/O ports that may be used to trigger external
events from DMP128 actions, or for external events to trigger DMP128 actions. The
DSPConfigurator software provides pre-configured scripts with a fixed set of common
trigger/event combinations. When selected, the script is compiled and placed onto the
File Management system of the device. For more advanced or custom scripts, contact an
Extron Electronics Applications Engineer.
When no scripts are active, the digital I/O ports default to DI (digital input) and inactive
(‘Logic Hi’
≈
+5VDC). The DI detects a Logic Hi as +5 VDC and LogicLow (active) as less
than +1 VDC.
A DO (digital output) sends a Logic Lo as less than +1 VDC and a Logic Hi as +5VDC.
For every script that involves a DO, two versions are available to provide either a
Logic Hi or a Logic Lo response to any action. The alternate script is designated as
“ReverseDO.”
To build a script and place it into the DMP128 File Management system:
1. From the tools menu, click
Configure Digital I/O, then select Build Digital I/O
Configuration.
2. This brings up a dialog that allows selection from a list of pre-configured scripts.
3. Select a script from the Select a Digital I/O Configuration section. The
eventdescription section describes the script and how the Digital I/O ports act while
the script is running. Highlight the desired script, then click OK.
4. A dialog box appears, verifying the file has been successfully uploaded to the device.
NOTE: When performing this procedure in Emulate mode, the connection
dialog will appear between step 3 and step 4. The DSP Configurator will
connect and then disconnect during the procedure, returning to Emulate
mode when completed.
DMP128 • Software Control 88