Hitachi LH1 Series Basic Manual page 63

Chapter 4
[AJ-21] to [AJ-32]
PID3 function
Code/Name
AJ-21
00(Disable)/01(Enable)/
PID3
02(Enable (with inverted output))
enable
・The PID3 function is enabled with the above parameter.
・If [AJ-21]=01 when the PID output reaches a negative
value, the PID output is limited to 0.
・If [AJ-21]=02 when the PID output reaches a negative
value, the PID output lets out an inverted output.
・By turning on the input terminal 045[PID3], the PID3
output becomes 0.
Code/Name
AJ-22
PID3 deviation inversion
PID target
+
value
-
×(-1)
Feedback
・PID3 deviation can be reversed.
Code/Name
AJ-23
PID3 unit selection
AJ-24
PID3 scale adjustment (0%)
AJ-25
PID3 scale adjustment (100%)
AJ-26
PID3 scale adjustment
(decimal point position)
・You can switch the display data and the display unit
involved in the output of the PID control by the
calculation.
Code/Name
AJ-27
PID3 set-point input
source selection
AJ-30
PID3 set-point setting
*2) Adjustable with [AJ-24] [AJ-25] [AJ-26]
・When PID3 target value input is selected, if the selected is
the parameter setting, [AJ-30] gets enabled.
Code/Name
AJ-32
PID3 feedback input
source selection
・Selects the PID3 feedback reference.
*1) 00(Not used)/01(Terminal[Ai1])/02(Terminal[Ai2])/03(Terminal[Ai3])/
04(Terminal[Ai4])/05(Terminal[Ai5])/06(Terminal[Ai6])/07(Parameter
setting)/08(RS485)/09(Option-1)/10(Option-2)/11(Option-3)/12(Pulse
train input (internal)/13(Pulse train input (option)
Initial
Range (unit)
value
00
Initial
Range (unit)
value
00(Disable)/
00
01(Enable)
PID3
deviation
inversion
[AJ-22]
00
PID
deviation
01
Initial
Range (unit)
value
refer <unit table> of
the end of this 01
chapter.
-10000 to 10000 0
-10000 to 10000 10000
0 to 4 2
Initial
Range (unit)
value
00 to 13 *1) 07
-100.00 to 100.00(%)
0.00
*2)
Initial
Range (unit)
value
00 to 06/08 to 13 *1) 01
For parameter configuration
Code/Name
AJ-33
PID3 proportional gain
AJ-34
PID3 integral time constant
AJ-35
PID3 derivative gain
・The PID3 gains are set by the above parameters.
・If input terminal 046[PIDC3] is active (ON), the value of
the integral constant is cleared. If it is done while the
inverter is in running, the driving condition may become
unstable.
Code/Name
AJ-36
PID3 output variable
PID output (%)
PID
Target
value
・[AJ-36] Limits the output range of the PID. If [AJ-36] =0.00
the limit is disabled.
Code/Name
AJ-37
PID3 over deviation
level
PID deviation (%)
0%
Output
terminal
ON
089[OD3]
・When the PID deviation pass over ±[AJ-37], the output
terminal 089[OD3] is activated.
Code/Name
AJ-38
Turn-off level for the PID3
feedback compare signal
AJ-39
Turn-on level for the PID3
feedback compare signal
PID feedback (%)
0%
RUN command
090[FBV3]
ON
・When the PID feedback cross over the [AJ-38] level, the
output terminal 090[FBV3] is OFF. If the PID feedback
crosses under the [AJ-39] level, 090[FBV3] is turned on.
4-23
[AJ-33] to [AJ-39]
Initial
Range (unit)
value
0.0 to 100.0 1.0
0.0 to 3600.0(s) 1.0
0.00 to
0.00
100.00(s)
Range (unit) Initial value
0.00 to 100.00(%) 0.00
PID output range
[AJ-36]
[AJ-36
Time(s)
Range (unit) Initial value
0.00 to 100.00(%) 3.00
[AJ-37]
[AJ-37]
ON
Time(s)
Range (unit) Initial
value
0.00 to 100.00(%) 100.00
0.00 to 100.00(%) 0.00
[AJ-38]
[AJ-39]
Time(s)
ON
ON