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8-18

IM 05P02C41-01EN

Cascade Position Proportional Control Function Block Diagram

Communication

COM

Aux. input

SP limiter

Loop-1 PV input

Equipped as standard

(for Standard model)

Suffix code: Type 2 = 1 or 4 is necessary.

Loop-2 PV input

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

Contact inputs

A.BS

A.FL

PMD An, Bn

10-seg. linearizer approx./bias

PMD An, Bn

10-seg. linearizer approx./bias

PV input bias

PV input filter

PMD An, Bn

CNT ALG

RMS

SPH, SPL

RFL

A.SR A.LC

UNIT

RH, RL

SDP

SH, SL

A.BS

A.FL

A.SR A.LC

UNIT

RH, RL

SDP

SH, SL

AIN2

PMD An, Bn

A.BS

A.FL

A.SR A.LC

UNIT

RH, RL

SDP

SH, SL

Tracking signal (Tracking when not in Cascade)

LSP

CAS

Switch to AUTO when

Loop-1 PV input burnout

or A/D error occurs.

Loop-2 local target setpoint

OH, OL

SP limiter

RUNRESET

Remote input filter

Output limiter

Loop-1 control computation

Manual operation

Input error preset output

Preset output

When Loop-2 sensor

burnout

occurs

Normal

MAN

RUNRESET

EPO

OH, OL

CAS, AUTO

Output limiter

Signal comparison

Feedback input

Direct/reverse signal

Motor-operated valve

Relay output

VALV

FBIN

Equipped as standardEquipped as standard

Current Current

OUT RET

PMD

OU.H OU.L

HYS

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

Valve position sliding

resistor or current

In Estimating-type position proportional control, the limiter function

does not work on output operation.

The reverse-signal relay turns on when being limited by low limit.

The direct-signal relay turns on when being limited by high limit.

H relay

( key)

L relay

( key)

In Manual operation, the relay turns on while the or key is pressed.

Output limiter does not work.

(for Standard model)

DI16 is equipped when

suffix code: Type 2 = 1 or 4.

* The LP2 lamp is lit while the Loop-2 parameter is displayed.

Loop-2 control computation

Terminal Parameter Function

Analog signal Contact signal Front panel key

Legend

PV display

SP display

Input ladder calculation program (signal goes to the control computation as is when without ladder program). For ladder program, see the LL50A Parameter Setting Software User’s Manual.

PV display

SP display

(for Standard model)

Remote input can be used when

suffix code: Type 2 = 4.

Aux. analog (remote) input

Input type

Input unit

Input range/scale

Analog input bias

Square root extraction

Analog input filter

10-seg. linearizer approx./bias

Position Proportional Computation Output cannot be calculated by ladder program.

An external analog signal can

be used for Loop-2 SP. Use

the ladder program of LL50A

Parameter Setting Software

to build the function.

*1: RS-485, Ethernet, PROFIBUS-DP,

DeviceNet, CC-Link

For the model with optional suffix code /DR:

Remote input with direct input

(E1-terminal area) can be used

when suffix code: Type 2 = 1 or 4,

and with optional suffix code /DR.

However, DI16 is to be deleted.

Program pattern selection

DI41 to DI45 are equipped when suffix

code: Type 2 = 0, 1 or 3.

The function is assigned to each DIs at

factory default.

Program pattern

Local target setpoint

Reset

TSP S.PID

PTNO.

TIME RAMP

L.PID

LSP

REM

LOC

RUN

RST

LSP/CAS

LSP

L.PID

RST

REM

LOC

RUN

LSP/CAS

RESET/RUN switch

LOCAL (ON) / CASCADE (OFF) switch

Start of program operation

when DI changes from OFF to ON.

Stop of program operation

when DI changes from OFF to ON.

Start of local-mode operation

when DI changes from OFF to ON.

Switch between the ON and OFF states of

each contact inputs to select from

program pattern numbers.

(Select a number during a RESET state.)

RST

REM

A/M

LOC

RUN

AL3AL2AL1

PV event 1

PV event 2

PV event 3

Time event 1

Time event 2

Time event 3

Time event 4

DO23DO22DO21 DO24

Time event 5

DO25

PV event, Time event, Alarm

Output ladder calculation program (signal goes to the output as is when without ladder program). For ladder program, see the LL50A Parameter Setting Software User’s Manual.

RBS

Preset output

DO31 to DO35 are assinged Time event 6 to 10.

(for Detailed model)

Optional suffix code /R1 is necessary.

(for Detailed model)

DI16 is equipped when

optional suffix code /R1.

(for Detailed model)

Remote input can be used when

optional suffix code /A2.

For the model with optional suffix code /U1: