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8 2321-20 WAVEFORM MODULE
143
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9
APPX
IDX
(c) Alarm setting/recording function
Start trigger, and power outage/restoration are identified as alarm,
and during the availability of recording function, are recorded as
flash memory.
Start trigger:
Pre-trigger/post-trigger Pre-trigger length and post-trigger length can be set as long as the
data length is not exceeded.
*Pre-trigger can be set for all triggers but there are limitations for post-
trigger setting.
❖
"Trigger correspondence table"(P.143)
Trigger filter A trigger can be activated when the trigger condition continues for a
certain period of sampling time. Trigger filter can be set within a sam-
pling area of 0 to 255.
Trigger output When the start trigger is activated, TRIG. OUT terminal becomes ac-
tive (Open collector ON).
Trigger output time can be chosen from the following:
• Continuation of output (reset from PC application)
• Specified output time (1 to 255 s, reset from PC application)
• During waveform retrieval (from start trigger to stop trigger or maxi-
mum recordable length)
Trigger correspondence table
(

indicates that setting is possible)
* Stop trigger only available in OR setting
Stop trigger (end of waveform recording) Trigger setting items
Analog Logic External CH synchro-
nization Trigger
filter Post-
trigger
Level Window Pattern
S
tart
trigg
e
r (s
ta
rt of
wav
e
for
m
re
c
o
rdin
g)
Analog Level
   
×
 
Window
   
×
 
Logic Pattern
   
×
 
External --
   
× ×

timer -- × × × × × × ×
software -- × × × × × × ×
CH synchro-
nization -- × × × ×

× ×
Measured
value Level × × × × × × ×
Window × × × × × × ×
All waveform data will be erased when setting is changed.
Identification
method For the analog trigger and logic trigger, the instantaneous value of each
sampling is identified, while for the measured value trigger, the measured
value at each second is identified. In both cases, it is effective for the respec-
tive mode.
Recording
contents Data

time, CH, trigger type (Type 1)
Waveform recording is carried out under the conditions pre-set (b).
Power outage Identification method, a power outage/restoration is identified after power
has been restored.
Recording contents: One Data set contains time and outage/restoration.