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10
Chapter
Loop Break Detection Time
,
Loop Break Detection Width
This function detects if the control loop is broken.
This function does not use a CT like the heater break
alarm, but instead PV change when using control output
to determine if the loop is broken.
The loop break detector has the following functions.
Loop break detection time and width are related as follows:
Example of Loop Break Detection in Reverse Operation
Setting Loop Break Time and Width
The following steps explain how to set alarm activation by
using detection time = 600 sec (10 min) and width = 20°C as
an example.
Loop break
detection time
Specifies how much time must pass before the
loop is determined to be broken.
• Range: 0 sec to 9999 sec
Loop break
detection width
Sets the temperature range before detecting for a
broken loop
• Range: 0.0% to 100.0% FS
Caution
If there is an abnormal input (UUUU, LLLL) or an input setting
error (Err), the loop break detection alarm sounds before even
before the loop break detection time period.
PV does not rise even if
the control output rises
ON
OFF
alarm output
t
set value
loop break detection range
loop break
detection time
1
Display the setup mode channel menu ("
ooo
oPPPPEEEE CCCChhhh
111
1
"), then use the
keys to display ALM
("
AAA
ALLLLMMMM CCCChhhh8888
").
2
Press and hold the
key to display alarm
hysteresis 1 ("
AAA
A1111hhhhyyyy
"), then use the
keys to
display loop break detection time ("
LLL
LbbbbTTTTMMMM
").
3
Press the
key, then use the
keys to
select 600 when the bottom part of the display
begins to blink.
The loop break detection time is set to 600 sec
(10 minutes).
4
Press the
key to confirm the setting.
5
Use the
keys to display "LbAb" ("
LLL
LbbbbAAAAbbbb
").
Set the loop break detection width.
6
Press the
key, then use the
keys to
select 20.0 when the bottom part of the display
begins to blink.
The loop break detection width is set to 20.0°C.
7
Press the
key to confirm the setting.
8
Press the
key to return to the operation mode
PV/SV display.
Содержание PXG4
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Страница 10: ...9 1 Chapter Chapter 1 Part Names and Functions Part Names and Functions 10...
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Страница 132: ...131 13 Chapter Chapter 13 Password Setup Ch11 Overview of Password Setup Ch11 132 Passwords 1 to 3 132...
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Страница 152: ...151 16 Chapter Chapter 16 Troubleshooting Troubleshooting 152...
Страница 154: ...153 17 Chapter Chapter 17 Appendix Delay Start Function 154 Return to Factory Default Setting Function 155...
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