CHAPTER 4 APPLIED OPERATION
E5CK
4--10
•
The LBA detection time is automatically set by auto-tuning (except in
heating and cooling control).
•
If the optimum LBA detection time cannot be obtained by auto-tuning,
set the time in the
“
LBA detection time” parameter (level 2 mode).
•
Calculate the LBA detection time as follows:
(1) Set output to maximum.
(2) Measure the time it takes for the input change width to reach the LBA
detection width (default: 0.2 % full-scale).
(3) Take a value twice that of the measurement time as the LBA detection
time.
PV
0.2%FS
Measurement time Tm
LBA detection time = Tm x 2
Output
Time
(4) In the case of ON/OFF operation, set the LBA detection time to a val-
ue longer than the control period.
Symbol
Parameter Name: Mode
Application
AT Execute/Cancel : Level 1
Automatic setting of LBA detec-
tion time
LBA detection time : Level 2
Setting of LBA detection time
LBA detection width : Expansion
Changing of LBA detection
width
F
Setting the LBA
detection time
F
Determining the
LBA detection
time
Parameters