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 page256.
•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)