Hitachi SJ Series User Manual page 259

Chapter 12
12.10.2 Use PID1
A
• PID1 can receive 3 inputs together with PID target
value/PID feedback value.
• Check the following schematic diagram.
Block diagram of PID1 control
[FA-30]
[AH-07]
PID target value 1
[FA-32]
[AH-42]
PID target value 2
[FA-34]
[AH-44]
PID target value 3
[db-30]
[AH-51]
PID feedback data 1
[db-32]
[AH-52]
PID feedback data 2
[db-34]
[AH-53]
PID feedback data 3
[PRO] terminal
OFF
[AH-61]
Proportional gain 1
ON
[AH-64]
Proportional gain 2
OFF
[AH-62]
Integral gain 1
ON
[AH-65]
Integral gain 2
OFF
[AH-63]
Differential gain 1
ON
[AH-66]
Differential gain 2
PID1 target value 1
Operator selection [AH-50]
+(01), -(02),
×(03), ÷(04)
Minimum deviation (05)
Maximum deviation (06)
01
PID1 feed
Back value 1
Operator selection [AH-54]
+(01), -(02),
×(03), ÷(04),
Square root of FB1 (05)
Square root of FB2 (06)
Square root of FB1 - FB2
(07)
Average (08)
Minimum (09)
Maximum (10)
01
PID1 control
P control
I control
D control
[db-61] [db-62]
12-10-4
• PID gain 1 and 2 can be switched by the input
terminal function [PRO].
• PID1 output can be used as a target value of PID2.
PID1 deviation
+
00
-
01
×(-1)
PID feedback
Comparison signal [FBV]
+
+ +
+
+
[db-64]
0 command
[db-63]
Inverter Functions
[db-51]
minus 1
[AH-02]
PID deviation excessive
[OD]
I control integral value clear [PIDC]
PID feed-forward selection
PID1 selection
[AH-01]
00
01
02
PID output command
[AH-70]
[db-50]