6-9
PPC Manual Revision 1
n
Cascade Control Function Block Diagram
Target setpoints 1 to 8
*1
Output limiter
Manual operation
Manual preset output
Input error preset output
Preset output
When Loop-2 sensor burnout occurs
Normal
MAN
RUNSTOP
SP ramp rate
SP limiter
DI2 DI3DI1 DI16PV RSP
Input type
Input unit
Input range/scale
Analog input bias
Square root extraction
Analog input filter
Input type
Input unit
Input range/scale
Analog input bias
Square root extraction
Analog input filter
10-seg. linearizer approx./bias
PV input bias
PV input filter
Ratio bias computation
A.BS
A.FL
BS
FL
PMD An, Bn
10-seg. linearizer approx./bias
PMD An, Bn
10-seg. linearizer approx./bias
PV input bias
PV input filter
BS
FL
PMD An, Bn
CNT ALG
UPR, DNR TMU
SPNO
SPNO
SP
R/L
SPH, SPL
UPR, DNR
C/A/M
SPH, SPL
A.SR A.LC
UNIT
IN
RH, RL
SDP
SH, SL
A.BS
A.FL
A.SR A.LC
UNIT
IN
RH, RL
SDP
SH, SL
EPO
OH, OL
OH, OL OLMT
PO
C/A/M
S/R
OT
MPON
Tracking signal (Tracking when not in Cascade)
AUTO, MAN
AUTO, MAN
CAS
CAS
CAS, AUTO
A/M
Loop-2 target setpoints
Output limiter
OH, OL
SP ramp rate
SP limiter
RUNSTOP
S/R
Output limiter
Current or
voltage pulse
Relay Current
OUTOUT RET AL3AL2AL1
PMD
OU.H OU.L
An, Bn
Split computation
10-seg. linearizer approx./bias
RET.H RET.L
PMD An, Bn
Split computation
10-seg. linearizer approx./bias
OUT retransmission output
O1RS
RET retransmission output
RTS
Alarm
Output terminal assignment
STOP (ON)/RUN (OFF) switch
(Current when retransmission output)
Communication
Loop-1 PV input
* The LP2 lamp is lit while the Loop-2 parameter is displayed.
Loop-2 PV input
Remove auxiliary analog
input (if equipped)
Contact inputs
Cascade (OFF→ON)
Automatic (OFF→ON)
Manual (OFF→ON)
STOP (ON)/RUN (OFF) switch
Switch to AUTO when
Loop-1 PV input burnout
or A/D error occurs.
STOP (ON)/RUN (OFF) switch
Loop-2 control computation
Loop-1 control computation
COM
LOCALREMOTE
* After the control output terminal is specified by the parameter OT,
other current output terminals can be used as retransmission output.
Terminal Parameter Function
Analog signal Contact signal Front panel key
Legend
Alarm 1
(Loop-1 PV high limit)
Alarm 2
(Loop-1 PV low limit)
Alarm 3
(Loop-1 PV high limit)
PV display
SP display
PV display
SP display
*1: RS-485, Ethernet (if equipped)
**
**
**
**
**
**
**
**
** **
**
Loop-2 parameters
DI16 is equipped on models with remote
auxiliary analog input RSP
** Loop-2 parameters
Chapter 6: Control Mode Settings
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