ABB ACS355 series - Page 153

Program features 153
The following figure presents the speed/scalar control block diagram for process
controller PID1.
PID ACT
PID1 Out
1106
n
1102
switch
EXT1/EXT2
Control
panel
switch
LOC/REM
1101
switch
Local ref
Panel
ref1
Panel ref2
n
value
n
1104
Limiter
PID
ACT
value
Panel ref2
500%
Limiter
-500%
PID1 Out
Average speed
Const speed 7
Speed
n
AI Current Torque Power COMM ACT
n
AI Current To rq ue Power COMM ACT
4014
…
4021/
PID act
selection
1103
EXT1 ref
select
1106
EXT2 ref
select
Panel ref1 AI …
4010/4110*
PID1 ref
select
4014
…
4021/
PID act
selection
4012,4013/
Limiter
Group 12
Constant
speed
Group 12
Constant
speed
Switch
Group
PID1
controller
1106
Switch
1107
Limiter
Group 30
Alarm
speed
Group
PID1
controller
LOC
REM
ref
4112,4113*
40/41*
40/41*
4114
…
4121*
4141
…
4121*
*Parameter 4027 selects between PID parameter set 1 and 2, ie, group 40 and 41.
Panel ref2 AI … Panel ref2 AI …
AI2+SEQ AI2+SEQ SEQ PROG