Hitachi SJ Series User Manual page 271

Chapter 12
PID start abnormal judgment
A
• It is a function to detect breakage of pipes such as
water leakage.
• Abnormality will be judged when PID-FB value is
lower than [AH-82] PID start abnormality judgment
level after the elapse of [AH-80] soft-start time
following PID soft-start.
Feedback value
PID start abnormality
judgment level [AH-82]
Output
Frequency
Soft-start target level
[AH-76]
PID operation
Parameter
Item
PID start abnormal
judgment implement
selection
PID start abnormality
judgment level
Acceleration according to [AH-78]
Soft-start time [AH-80]
Parameter
00
01
[AH-81]
02
[AH-82] 0.00~100.00(%)
12-10-16
• Abnormal operations vary depending on the setting
of [AH-81] PID start abnormality judgment
implementation selection at the time of abnormality
judgment.
- Nothing will be done when [AH-81] is 00.
- When [AH-81] is 01, it will trip with [E120] PID
start abnormality error after the abnormal status
elapsed the set time for [AH-80].
- When [AH-81] is 02, the [SSE] terminal will be
turned ON after the abnormal status elapsed the
set time of [AH-80].
The [SSE] terminal will stay ON until it stops.
OK
NG
Abnormality occurrence
ON
Data
Disable
Enable It will trip with [E120] PID start
abnormality error when start
abnormality is judged.
Enable The [SSE] terminal will be
turned ON when start abnormality is
judged.
Is a level to judge start abnormality.
Inverter Functions
Time
Description