PROGRAMMABLE DIGITAL I/O CHANNELS
MTS-1700 SERIES OPERATION AND REFERENCE MANUAL A-3
CU A002 15A
MANTA TEST SYSTEMS
A.5 OPERATION
Control of all digital I/O channels is provided by extensions of the MTS-1710’s RS-232 command set. All
functions of the digital I/O channels are available in all the MTS-1710’s operation modes, as well as in fault
playback.
A.5.1 Digital Inputs
The state of all digital inputs may be read at any time. In addition, while the MTS-1710 is in the FAULT
state, all digital inputs are sampled at 1ms intervals, allowing the MTS-1710 to provide sequence of events
recording during a test.
Input channels 0-6 may be used as an external start trigger source. Input channels 0-15 may be used as an
external stop trigger source. Start and stop triggers from these channels are logically OR’ed with the start/
stop triggers on the front panel of the MTS-1710.
The MTS-1730 external start trigger channel can be set via the menu under OPTION MTS-1730 START.
The MTS-1730 external stop trigger channel can be set via the menu under OPTION MTS-1730 STOP.
For MTS-1730 systems with more than 16 input channels, only one bank of up to 16 channels can be active
at a time. The active bank can be selected via the menu under OPTION MTS-1730 BANK.
A.5.2 Digital Outputs
The state of all digital outputs may be read at any time. The outputs may be programmed to have different
values in prefault, fault and postfault states.
During the fault state, outputs may be programmed to change at a specific time(s). For more complex
simulations, the output may be programmed to change in response to some condition on the input channels.
This condition may be defined by a logic equation (i.e. AND/OR condition).
A.5.3 Phase Comparison Output
When enabled, this feature replaces one of the normal output channels with a programmable square wave
output for use as a phase comparison signal.
The phase of the output is programmable in reference to the voltage and current outputs of the MTS-1710,
and may be defined to be different values in prefault, fault and postfault states. The output also may be
disabled in any fault state, or enabled after a specific time in the FAULT state. The pulse width of the output
is also programmable.
A.6 COMMAND SET DESCRIPTION
The following section describes the use of the RS-232C command set for controlling the digital I/O
channels: