Unipulse TM380, Operation Manual

Page: 68 / 147

57
7 EXPLANATION OF HOLD FUNCTIONS
57
EX
PLANATION OF HOLD FUNCTIONS
Chapter
7
■
Bottom hold
The maximum value in the negative direction (bottom value) of the specified section is held.
The section is specified by the setting of "all section", "external signal", "external time", or
"level+time".
(Example) All section Bottom hold
t1: A delay time between the instant
when the T/H signal is inputted and
the instant when the indicated value
is held
Approximately 1.0ms (MAX.)
t2: A delay time between the instant
when the T/H signal is released and
the instant when the indicated value
returns to tracking
Approximately 1.0ms (MAX.)
t3: A minimum reset signal width
required for releasing the hold
Approximately 1.0ms (MIN.)
Note: During the undetermined section,
the judging output varies with
fluctuations in the input waveform.
However, the H/E output remains
on during the undetermined
Section. Read the judging result
when the indicated value becomes
stable (immediately before the T/H
signal rises).
■
Peak-to-Peak (P-P) hold
The difference value between the peak and valley over the specified section is held.
The section is specified by the setting of "all section", "external signal", "external time", or
"level+time".
(Example) All section Peak-to-Peak (P-P) hold
t1: A delay time between the instant
when the T/H signal is inputted and
the instant when the indicated value
is held
Approximately 1.0ms (MAX.)
t2: A delay time between the instant
when the T/H signal is released and
the instant when the indicated value
returns to tracking
Approximately 1.0ms (MAX.)
t3: A minimum reset signal width
required for releasing the hold
Approximately 1.0ms (MIN.)
Note: During the undetermined section,
the judging output varies with
fluctuations in the input waveform.
However, the H/E output remains
on during the undetermined
section. Read the judging result
when the indicated value becomes
stable (immediately before the T/H
signal rises).
Indicated
t2
t3
Sensor input value
Detection ・ Hold section
t
＋
T/H
HI-LO Limit
Judging Output
H/E
Detection
・
Hold section
t1 t2 t1
t3
OFF
ON
OFF
ON
OFF
ON
OFF
ON
HOLD
Status Display
Blink OFF Blink OFF OFF
HOLD
Button
value
Undetermind
Section (Note)
Undetermind
Section (Note)
Indicated value
Sensor input value
Detection ・ Hold section
t
＋
T/H
HI-LO Limit
Judging Output
H/E
t2
t1
t3
Indicated
OFF
ON
OFF
ON
OFF
ON
HOLD
OFF
ON
Button
HOLD
Status Display
Blink OFF OFF
Standard line
(Hold section
only)
Indicated value
= 0
value=0
Undetermind
section (Note)
(Hold Section Only)
Indicated value = 0