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8-17

IM 05P02C41-01EN

Control Functions

Cascade Heating/cooling Control Function Block Diagram

Communication

COM

Aux. input

SP limiter

Loop-1 PV input

Equipped as standard

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

(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

RUNSTOP

Remote input filter

Output limiter

RESET/RUN switch

Loop-1 control computation

Loop-2 control computation

Manual operation

Manual preset output

Input error preset output

Heating-side preset output

RESET/RUN switch

Normal Normal

MAN

RUNRESET

Current or

voltage pulse

Relay Current or

voltage pulse

Relay Current

EPO

OH, OL OHc, OLc

Input error preset output

OUT retransmission output OUT2 retransmission output

EPO

Cooling-side preset output

RESET

POc

O1RS O2RS

RET retransmission output

RTS

MPON

Heating-side

output

Heating-side

output

Cooling-side

output

Cooling-side

output

OUTOUT OUT2 OUT2

Heating/cooling computation

RET

* 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

Heating-side output limiter Cooling-side output limiter

RUN

Output terminal assignment

PMD

OU.H OU.L OU2.H OU2.L

An, Bn PMD An, Bn

Split computation

10-seg. linearizer approx./bias

Split computation

10-seg. linearizer approx./bias

RET.H RET.L

PMD An, Bn

Split computation

10-seg. linearizer approx./bias

CAS, AUTO

Equipped as standard

(Current when retransmission output) (Current when retransmission output)

When Loop-2 sensor

burnout occurs

When Loop-2 sensor

burnout occurs

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

Manual output is prioritized even if

sensor

burnout

occurs in MAN.

(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

*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

Switch between the ON and OFF states of

each contact inputs to select from

program pattern numbers.

(Select a number during a RESET state.)

DI41 to DI45 are equipped when suffix

code: Type 2 = 0, 1 or 3.

The function is assigned to each DIs at

factory default.

(for Standard model)

DI16 is equipped when

suffix code: Type 2 = 1 or 4.

RBS

Program pattern

Local target setpoint

Reset

TSP S.PID

PTNO.

TIME RAMP

L.PID

LSP

REM

LOC

RUN

RST

LSP/CAS

RST

REM

LOC

RUN

LSP/CAS

LSP

L.PID

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.

RST RST

REM

A/M

LOC

RUN

REM

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.

LOCAL (ON) / CASCADE (OFF) switch

Preset output

DO31 to DO35 are assinged Time event 6 to 10.

(for Detailed model)

Optional suffix code /R1 is necessary.

(for Detailed model)

Remote input can be used when

optional suffix code /A2.

(for Detailed model)

DI16 is equipped when

optional suffix code /R1.

For the model with optional suffix code /U1: