Buffering By External Input Trigger - Panasonic FP7 User Manual

Optional Settings for Analog Input

6.7.3 Buffering by External Input Trigger

Using external input as trigger
The following sequence shows the operation of buffer processing with input into the external
trigger input terminal of the unit.
(K)
Digital converted
value CH0 to CH3
(Flag/Data)
(1)
Buffer
execution relay
(*1)
Buffer
(Unit memory)
TRIG0
Pre-trigger data
enabled (*2)
Buffering flag
(*3)
Buffering
completion flag
(*4)
Read
completion
relay (*5)
(1) Pre-trigger buffering will start when the user program turns ON the buffer execution relay.
(2) The pre-trigger data enabled flag is turned ON when the number of pre-trigger data items
is reached.
(3) Starts buffering with the rising of TRIG0. Buffering will continue until the preset number of
buffer data items is reached from the rising of TRIG0.
(4) Buffering is completed with the number of buffer data items obtained.
(5) The user program reads the buffering data and turns ON the read completion relay.
(6) The unit waits for the next trigger and repeat the sequence from pre-trigger buffering.
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6-20
Starts buffering at specified cycle.
Pre-trigger buffering
(2)
(4)
Buffering
(3)
(5)
(6)
Pre-trigger
Buffer read
(t)