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VT1422A Command Reference 257Chapter 7
ARM
Subsystem Syntax ARM
[:IMMediate]
:SOURce BUS | EXTernal | HOLD | IMMediate | SCP | TTLTrg<n>
:SOURce?
ARM[:IMMediate]
ARM[:IMMediate] arms the trigger system when the module is set to the ARM:SOUR
BUS or ARM:SOUR HOLD mode.
Comments • Related Commands: ARM:SOURCE, TRIG:SOUR
• *RST Condition: ARM:SOUR IMM
• Send with VXIplug&play Function: hpe1422_cmd(...)
Usage ARM:IMM
After INIT, system is ready for trigger event
ARM
Same as above (:IMM is optional)
ARM:SOURce
ARM:SOURce <arm_source> configures the ARM system to respond to the
specified source.
Parameters
Comments • The following table explains the possible choices.
• See note about ARM subsystem on page 256.
• When TRIG:SOURCE is TIMER, an ARM event is required only to trigger the
first scan. After that the timer continues to run and the module goes to the
Waiting-For-Trigger State ready for the next Timer trigger. An ABORT
command will return the module to the Trigger Idle State after the current scan
is completed. See TRIG:SOURce for more detail.
Parameter
Name
Parameter
Type
Range of
Values
Default
Units
arm_source discrete (string) BUS | EXT | HOLD | IMM | SCP
| TTLTrg<n>
none
BUS ARM[:IMMediate]
EXTernal “TRG” signal on terminal module
HOLD ARM[:IMMediate]
IMMediate The arm signal is always true (continuous arming).
SCP SCP Trigger Bus (future SCP Breadboard)
TTLTrg<n> The VXIbus TTLTRG lines (n=0 through 7)