VXi VT1529A/B 사용자 설명서

1. When TRIGger:SOURce is not TIMer, ARM:SOURce must be set to 

IMMediate (the *RST condition). If not, the INIT command will 
generate an error -221,"Settings conflict."

2. When TRIGger:SOURce is TIMer, the trigger timer interval 

(TRIG:TIM <interval>) must allow enough time to scan all channels, 
execute all algorithms and update all outputs or a +3012, "Trigger 
Too Fast" error will be generated during the trigger cycle. See the 
TRIG:TIM command on page 397 for details.

To set the trigger source to the internal Trigger Timer (the default):

TRIG:SOUR TIMER

To set the trigger source to the External Trigger input connection:

TRIG:SOUR EXT

To set the trigger source to a VXIbus TTLTRG line:

TRIG:SOUR TTLTRG1

Figure 4-6 shows that when the TRIG:SOUR is TIMer, the other trigger 
sources become Arm sources that control when the timer will start. 
The command to select the arm source is ARM:SOURce <source>.

•

The <source> parameter choices are explained in the following table.

When TRIGger:SOURce is not TIMer, ARM:SOURce must be set to 
IMMediate (the *RST condition). If not, the INIT command will generate 
an error -221,"Settings conflict."

To set the external trigger signal as the arm source:

ARM:SOUR EXT

BUS

 ARM[:IMMediate]

EXTernal

 "TRG" signal input on terminal module

HOLD

 ARM[:IMMediate]

IMMediate

 The arm signal is always true (scan starts when an 
INITiate:

…

 command is received).

SCP

 SCP Trigger Bus (future SCP Breadboard)

TTLTrg<n>

 The VXIbus TTLTRG lines (n=0 through 7)