Siemens RWD45U User manual

RWD45U Controller

Installation and

Commissioning Guide

Document No. 129-409

October 5, 2009

Item Number 129-409, Rev. BA

Function RWD45U controllers are intended for HVAC and Refrigeration systems including Heat

Pumps. They are suitable for 1-, 2-, and 3-stage compressors.

Input X1 detects the actual room or space temperature and compares it with the

setpoints. Depending on the deviation, the controller acts accordingly with its outputs to

achieve the desired setpoints. The RWD45U controller has a modulating 0 to 10 Vdc

output for economizer control or an additional independent control loop.

Function Summary •Controller – Stand-alone controller with four two-position (On/Off) outputs, and one

modulating 0 to 10 Vdc output.

•Universal input (X1) for the main temperature sensor.

•Universal input (X2) for the following auxiliary functions:

On/Off (Standby) Setpoint reset

Remote setting unit Sensor averaging

Alarm Winter/Summer setpoint changeover

Filter alarm Sensor select

•Universal input (X3) for the following functions:

−Economizer

−Second independent loop

•Digital input (D1) for the following digital functions:

−Day/night changeover setpoint

−On/Off (Standby)

−Alarm

−Filter alarm

•The RWD45U controller is intended for either DIN rail mounting in a switchboard or

screw mounting with a protective enclosure.

•Desired output configuration and auxiliary function must be entered for initial set-

up. See Initial Program Settings (New Controller).

Application The RWD45U has standard pre-configured applications. There are nine main

configuration loops with combinations of ten auxiliary functions. See Table 1.

Document Number 129-409 RWD45U Controller Installation and Commissioning Guide

October 5, 2009

Page 2 of 13 Siemens Industry, Inc.

Table 1. Application Numbers.

H = Heating

C = Cooling

Cr = Compressor

RV = Reversing valve

Eco = Economy

Main Loop

Auxiliary Loop

#1 × (2H2C + Eco Cool)

#2 × (3Cr

Setpoint reset

+ RV cool +

Eco Cool)

#3 × (3Cr + RV heat + Eco Cool)

#x0 (Standby)

#10

#20

#30

#x1 (Remote setpoint)

#11

#21

#31

#x2 (Alarm)

#12

#22

#32

#x3 (Filter alarm)

#13

#23

#33

#x4 (Setpoint reset)

#14

#24

#34

#x5 (Avg. X1, X2)

#15

#25

#35

#x6 (Win/Sum Digital)

N/A

#x7 (Win/Sum Analog)

N/A

#x8 (Sensor select)

#18

#28

#38

#x9 (Active input)

#19

#29

#39

H = Heating

C = Cooling

Cr = Compressor

RV = Reversing valve

Eco = Economy

Main Loop

Auxiliary Loop

#4 × (2H2C + Eco Heat)

#5 × (3Cr + RV cool + Eco Heat)

#6 × (3Cr + RV Heat + Eco Heat)

#x0 (Standby)

#40

#50

#60

#x1 (Remote

setpoint)

#41 #51 #61

#x2 (Alarm)

#42

#52

#62

#x3 (Filter alarm)

#43

#53

#63

#x4 (Setpoint reset)

#44

#54

#64

#x5 (Avg. X1, X2)

#45

#55

#65

#x6 (Win/Sum Digital)

N/A

#x7 (Win/Sum

Analog)

N/A N/A N/A

#x8 (Sensor select)

#48

#58

#68

#x9 (Active input)

#49

#59

#69

H = Heating

C = Cooling

Cr = Compressor

RV = Reversing valve

Eco = Economy

Ind = Independent

Main Loop

Auxiliary Loop

#7 × (2H2C + Ind Y)

#8 × (3Cr + RV cool + Ind Y)

#9 × (3Cr + RV Heat + Ind Y)

#x0 (Standby)

#70

#80

#90

#x1 (

Remote setpoint)

#71

#81

#91

#x2 (Alarm)

#72

#82

#92

#x3 (Filter alarm)

#73

#83

#93

#x4 (Setpoint reset)

#74

#84

#94

#x5 (Avg. X1, X2)

#75

#85

#95

#x6 (Win/Sum Digital)

#76

#86

#96

#x7 (Win/Sum Analog)

#77

#87

#97

#x8 (Sensor select)

#78

#88

#98

#x9 (Active input)

#79

#89

#99

RWD45U Controller Installation and Commissioning Guide Document Number 129-409

October 5, 2009

Siemens Industry, Inc. Page 3 of 13

NOTE: Three-stage applications are also used for one- and two-stage applications. Compressor stages are

selected during commissioning.

Example: Two-stage compressor with reversing valve on heating, economy cooling, and two averaging

sensors: #35.

Table 2. Input Configurations – X1, X2, X3 and D1.

Applications 10 Through 69

D1 Options

Filter

Alarm

Day/Night

Standby

#x0 (Standby)

Main

Standby

Eco

♦

–

#x1 (Remote

setpoint)

Main Remote setpoint Eco ♦♦♦♦

#x2 (Alarm)

Main

Alarm

Eco

♦

–

♦

#x3 (Filter alarm)

Main

Filter alarm

Eco

–

♦

#14, 24, 34 (Setpoint

Reset) *

Main Setpoint reset +

Eco (cool)

Standby ♦♦♦–

#44, 54, 64 (Setpoint

Reset)

Main

Setpoint reset

Eco

(heat)

♦♦♦♦

#x5 (Avg. X1, X2) Main Main Eco ♦

♦

#x6 (Win/Sum

Digital)

N/A

–

#x7 (Win/Sum

Analog)

N/A

–

#x8 (Sensor select)

Main

Eco

♦

#x9 (Active input)

Main

Standby

Eco

♦

–

* For applications 14, 24, and 34, the X2 sensor (outside air temperature) is used for both economizer and setpoint reset

shift.

Applications 70 Through 99

D1 Options

Filter

Alarm

Day/Night

Standby

#x0 (Standby)

Main

Standby

Ind

♦

–

#x1 (Remote

setpoint)

Main

Remote setpoint

Ind

♦♦♦♦

#x2 (Alarm)

Main

Alarm

Ind

♦

–

♦

#x3 (Filter alarm)

Main

Filter alarm

Ind

–

♦

#x4 (Setpoint reset)

Main

Setpoint reset

Ind

♦

#x5 (Avg. X1, X2) Main Main Ind ♦

♦

#x6 (Win/Sum

Digital)

Main

Win/Sum digital

Ind

♦♦♦♦

#x7 (Win/Sum

Analog)

Main

Win/Sum analog

Ind

♦♦♦♦

#x8 (Sensor select)

Main

Ind

♦

#x9 (Active input)

Main

Standby

Ind

♦

–

Document Number 129-409 RWD45U Controller Installation and Commissioning Guide

October 5, 2009

Page 4 of 13 Siemens Industry, Inc.

Table 3. Output Configurations – Q1, Q2, Q3, Q4, and Y1.

Application

Numbers

10 through 19

Heating Stage 2 (H2) Heating Stage 1 (H1) Cooling Stage 1 (C1) Cooling Stage 2 (C2) Eco Cool

40 through 49

Eco Heat

70 through 79

Ind

Application

Numbers

20 through 29

Reversing Valve (RV)

Cool

Compressor Stage 1

(Cr1) Compressor Stage 2

(Cr2) Compressor Stage 3

(Cr3)

Eco Cool

30 through 39

Reversing Valve (RV)

Heat

50 through 59

Reversing Valve (RV)

Cool

Eco Heat

60 through 69

Reversing Valve (RV)

Heat

80 through 89

Reversing Valve (RV)

Cool

Ind

90 through 99

Reversing Valve (RV)

Heat

NOTE: Application sheets for the listed applications are available on line.

RWD45U Controller Installation and Commissioning Guide Document Number 129-409

October 5, 2009

Siemens Industry, Inc. Page 5 of 13

Display Explanation

Symbol

Description

Setting Range

Symbol

Description

Setting Range

Main Screen

Adjustable setting screen

TOOL

PC communication port

being used

Application Numbers

10 through 99 (Not

consecutive numbers)

OUT RANGE

The setting is out of range



Daytime operation

Err

Sensor error



Night time operation

Sec

Seconds

Universal (Main) Input X1

Ni 1000

Ω

: -58°F to 302°F

(50°C to 150°C)

(unchangeable)

Pt 1000 Ω: -4°F to 356°F

(-20°C to 180°C)

(unchangeable)

0 Vdc to 10 Vdc: -100 to

2400

Universal (Auxiliary) Input

Ni 1000

Ω

: -58°F to 302°F

(50°C to 150°C)

(unchangeable)

Pt 100 0Ω: -4°F to 356°F

(-20°C to 180°C)

(unchangeable)

0 Vdc to 10 Vdc: -100 to

2400

Variable resistor: the

resistance range should be

within 0

Ω

to 1000

Ω

Universal input X3

Ni 1000

Ω

: -58°F to 302°F

(50°C to 150°C)

(unchangeable)

Pt 1000 Ω: -4° to 356°F-

(-20°C to 180°C)

(unchangeable)

0 Vdc to 10 Vdc: -100 to

2400

Indicates cooling

°C

Celsius scale

Indicates heating

°F

Fahrenheit scale

SP-h

Setpoint on the heating side

for temperature control

----

No unit (e.g., pressure, air

quality and air volume flow)

SP-c

Setpoint on the cooling side

for temperature control

Kelvin

Analog output

0 to 10V

Percentage scale

Digital outputs

Output status = Off

ECO

Economy mode

Output status = On

R/V

Reversing valve status = On

Standby mode

OFF

Controller = Off

Controller = on standby

PS 4 – Differentials and Delays

Switching Differential

0.1 K to 50 K

TD1

Time Delay for heat ⇔

cool

0 to 4,096 sec

Minimum switch on time

for Q

0 to 4,096 sec

TD2

Time Delay for next

stage ON

0 to 4,096 sec

Minimum switch off time

for Q

0 to 4,096 sec

PS 3 – Auxiliary Control Loop Set-up

Setpoint reset shift

(Start point, end point and

shift differential)

Heating or reverse acting

output

Setpoint reset shift

(Start point, end point and

shift differential)

Cooling or direct acting

output

SUM

Summer changeover point

Digital input function

WIN

Winter changeover point

Integral action time

0 to 4,096 sec

Time delay from Winter

⇔

Summer changeover point

Proportional Band

Ni: 0.5 to 180 K

Pt: 0.5 to 180 K

Active input: depends on the

sensor range

Document Number 129-409 RWD45U Controller Installation and Commissioning Guide

October 5, 2009

Page 6 of 13 Siemens Industry, Inc.

Display Explanation, Continued

Symbol

Description

Setting Range

Symbol

Description

Setting Range

PS 2 – Unit X1, X2 and X3 Sensor Type and Sensing Range Definition

Unit

Define unit

°F or °C

ΔX1

Calibration offset for X1

(Ni and Pt sensor only)

-9°F to 9°F

-5 K to 5 K or

X1NI 1000

X1 is Ni 1000

Ω

temperature sensor

Ni 1000

Ω

: -58°F to 302°F

(-50°C to 150°C) (unchangeable)

ΔX2

Calibration offset for X2

(Ni and Pt sensor only)

-9°F to 9°F

-5 K to 5 K or

X2NI 1000

X2 is Ni 1000 Ω

temperature sensor Ni 1000 Ω: -58°F to 302°F

(-50°C to 150°C) (unchangeable)

ΔX3

Calibration offset for X3

(Ni and Pt sensor only)

-9°F to 9°F

-5 K to 5 K or

X3NI 1000

X3 is Ni 1000 Ω

temperature sensor

Ni 1000 Ω: -58°F to 302°F

(-50°C to 150°C) (unchangeable)

X1L

Start point of the X1

(for 0 to 10 Vdc only)

-100 to 2400

X1Pt 1000

X1 is Pt 1000

Ω

temperature sensor

Pt 1000

Ω

: -4°F to 356°F

(-20°C to 180°C) (unchangeable)

X2L

Start point of the X2

(for 0 to 10 Vdc only)

-100 to 2400

X2Pt 1000

X2 is Pt 1000

Ω

temperature sensor

Pt 1000

Ω

: -4°F to 356°F

(-20°C to 180°C) (unchangeable)

X3L

Start point of the X3

(for 0 to 10 Vdc only)

-100 to 2400

X3Pt 1000

X3 is Pt 1000

Ω

temperature sensor

Pt 1000

Ω

: -4°F to 356°F

(-20°C to 180°C) (unchangeable)

X1H

Stop point of the X1

(for 0 to 10 Vdc only)

-100 to 2400

X1 0-10

X1 is 0 to 10 Vdc input

sensor

0 to 10 Vdc: -100 to 2400

X2H

Stop point of the X2

(for 0 to 10 Vdc only)

-100 to 2400

X2 0-10

X2 is 0 to 10 Vdc input

sensor

0 to 10 Vdc: -100 to 2400

X3H

Stop point of the X3

(for 0 to 10 Vdc only)

-100 to 2400

X3 0-10

X3 is 0 to 10 Vdc input

sensor

0 to 10 Vdc: -100 to 2400

X2SP

Remote setpoint

0 to 10 Vdc or

0 to 1000 Ω

If X3 is independent

control

°C, °F, % ----(no unit display),

X1: 0 to 50°C ⇒Y1: 0 to 10 Vdc **

X2VR

Variable Resistor

0 to 1000 Ω

PS 1 – Application Number Selection:

Standby mode

AVERAGE

Averaging sensor X1 and

REM

Remote setting

WIN/SUM

AnG

Winter/Summer

changeover by analog

input

ALARM

Alarm indication

WIN/SUM

diG

Winter/Summer

changeover by digital

input

FILTER

Filter alarm indication

⇔

Selecting X2 or X1 as the

main sensor

COMP

Setpoint reset function

Act

Active sensor input

** (X1: 32°F to 122°F (0°C to 50°C) ⇒Y1: 0 to 10 Vdc). The independent Y1 is programmed as a 0 to 10 Vdc

output corresponding to a temperature range of 32°F to 122°F (0°C to 50°C) for sensor input X1 (Ni1000,

Pt1000). When this function is selected there is no economizer or a second independent control loop, and input

X3 is not used.

Commissioning

Guide

Commissioning is implemented via push buttons on the controller. The push buttons

have the following functions:

Press

Button to enter the PS page OR edit and save the value when the page

appears with the logo

Press

Button for viewing the next page OR to increase the value.

Press

Button for viewing the previous page OR to decrease the value.

Changing a parameter

1. Press the SEL λbutton.

2. Press the + σor –τbutton to increase or decrease the flashing parameter.

3. Press the SEL λbutton to save the value (During PS mode, the values are saved only after exiting the PS mode).

NOTE: A 9-pin port is provided for optional commissioning via Siemens software tool. See Software Tool

(Optional Programming).

SEL

RWD45U Controller Installation and Commissioning Guide Document Number 129-409

October 5, 2009

Siemens Industry, Inc. Page 7 of 13

Initial Program

Settings

(New Controller)

There are five levels of parameter setting (PS) modes: PS1 through PS4, and a

setpoint mode. Each PS has a set of default parameters, which can be changed during

commissioning.

When powered the first time, the controller will proceed to PS1 with default

application 10. See below for commissioning steps.

PS 1 – Application Settings

Range/Type

Default

Enter application number

10 through 99

Select number of compressor stages

1-, 2- or 3-stage

2-stage

Select reversing valve output – On or Off during no demand

On or Off

Off

After completing PS1, the user has the option to progress to setpoint mode (only for new RWD) by waiting for

two seconds and default parameters will be accepted. If parameters PS2 through PS4 need to be adjusted,

press the +σbutton immediately to the next PS (see Commissioning Flowchart).

PS 2 – Input X1, X2 and X3

Range/Type

Default

Select unit

°F or °C

°F

Select main sensor X1

Ni1000, Pt1000, 0 to 10V

Ni1000

Enter X1 sensor calibration offset (Ni or Pt only)

5 K

0 K

Enter X1 active sensor range (0 to 10 Vdc only) -100 to 2400 32°F to 122°F

(0°C to 50°C)

Select auxiliary sensor X2

Ni1000, Pt1000, 0 to 10 Vdc

Ni1000

Enter X2 sensor calibration offset (Ni or Pt only)

5 K

0 K

Enter X2 active sensor range (0 to 10 Vdc only)

-100 to 2400

32°F to 122°F

(0°C to 50°C)

Select sensor X3 (for Economizer sensor)

Ni1000, Pt1000, 0 to 10 Vdc

Ni1000

Enter X3 sensor calibration offset (Ni or Pt only)

5 K

0 K

Enter X3 active sensor range (0 to 10 Vdc only) -100 to 2400 32°F to 122°F

(0°C to 50°C)

Select unit for X3 (for Independent control sensor) C, F, %, -----, or

X1 32°F to 122°F (0°C to

⇒

Y1 (0 to 10 Vdc)

Select X3 sensor

Ni1000, Pt1000, 0 to 10 Vdc

Ni1000

Enter X3 sensor calibration offset (Ni or Pt only)

5 K

0 K

Enter X3 active sensor range (0 to 10 Vdc only)

-100 to 2400

32°F to 122°F

PS 3 – Digital, Auxiliary Function, Eco and Ind. (Y)

Range/Type

Default

Select digital input D1

D/N, Filter Alarm, Alarm, on/off

Depends on #x

Aux. Function = Setpoint reset

Setpoint reset start point, reverse acting

Setpoint reset sensor range

72°F (22°C)

Setpoint reset end point, reverse acting

Setpoint reset sensor range

64°F (18°C)

Setpoint reset shift

Setpoint reset sensor range

Setpoint reset start point, direct acting

Setpoint reset sensor range

82°F (28°C)

Setpoint reset end point, direct acting

Setpoint reset sensor range

90°F (32°C)

Setpoint reset shift

Setpoint reset sensor range

Aux. function = WIN SUM analog

Enter changeover setpoint for winter

Sensor range

72°F (22°C)

Enter changeover setpoint summer

Sensor range

82°F (28°C)

Enter changeover time delay, winter

⇔

summer

00.01 to 23 Hrs 59 min

00.01

Document Number 129-409 RWD45U Controller Installation and Commissioning Guide

October 5, 2009

Page 8 of 13 Siemens Industry, Inc.

PS 3 – Digital, Auxiliary Function, Eco and Ind. (Y) (Continued)

Range/Type

Default

For Economy mode (Eco)

Enter min limit for Eco mode to operate

Sensor range

55°F (13°C)

Enter max limit for Eco mode to operate

Sensor range

64°F (18°C)

Enter P-band for Eco Y1, XP

Sensor range

1 K

Enter min value for Eco Y1 output

0 to 100%

Enter max value for Eco Y1 output

0 to 100%

100%

For Independent Y1

Select control action

Direct or Reverse acting

Direct

Enter P-band, XP

Sensor range

4 K

Enter Integral time (TN)

0 to 4,096 s

256 s

Enter min value for Ind. Y1 output

0 to 100%

Enter max value for Ind. Y1 output

0 to 100%

100%

PS 4 – Differentials and Time Delays

Range/Type

Default

Enter switching differential (SD) for output stage 1, 2, and 3

Sensor range

1 K

Enter min On time for output stage 1, 2, and 3

0 to 4,096 s

0 s

Enter min Off time for output stage 1, 2, and 3

0 to 4,096 s

60 s

Enter time delay TD for next stage On

0 to 4,096 s

30 s

Enter changeover time delay TD, heating

⇔

cooling demand

0 to 4,096 s

120 s

Setpoint Mode

Range/Type

Default

Enter SP-h1

Sensor range

70°F (21°C)

Enter SP-h2

Sensor range

68°F (20°C)

Enter SP-h3

Sensor range

66°F (19°C)

Enter SP-c1

Sensor range

73°F (23°C)

Enter SP-c2

Sensor range

75°F (24°C)

Enter SP-c3

Sensor range

77°F (25°C)

If D1 is set for Day/Night

Enter night SP-h1

Sensor range

64°F (18°C)

Enter night SP-h2

Sensor range

63°F (17°C)

Enter night SP-h3

Sensor range

61°F (16°C)

Enter night SP-c1

Sensor range

79°F (26°C)

Enter night SP-c2

Sensor range

81°F (27°C)

Enter night SP-c3

Sensor range

82°F (28°C)

For remote setpoint – Heating stage 1 is the remote setpoint and the

reference point. A ∆SP is set between the stages.

H2 C1

Remote

Setpoint

Enter

∆

SP H2

Sensor range

-1 K

Enter

∆

SP H3

Sensor range

-2 K

Enter ∆SP C1 Sensor range 2 K

Enter

∆

SP C2

Sensor range

3 K

Enter

∆

SP C3

Sensor range

4 K

After completing the setpoints, press + button for the main display.

RWD45U Controller Installation and Commissioning Guide Document Number 129-409

October 5, 2009

Siemens Industry, Inc. Page 9 of 13

Main Display

(Normal Operation) The controller is active during main display.

The main display shows:

1. Whether Q.. is On or Off (= Off, ν= On).

2. X1 temperature in °F or °C.

3. Y1 output in volts DC.

4. Day/night settings (= day, = night).

5. Reversing valve status (= Off, R/V = On).

Figure 1. Main Display.

Other displays are available by pressing the +▲button and the various displays are listed below.

1. Setpoints

2. Digital input active or inactive

3. X2 sensor reading

4. X3 sensor reading

5. Q… output status

6. Y1 output in volts DC

7. Application #xx

Figure 2. Setpoint Display.

Changing Setpoint in

Main Display On entering any of the setpoint displays, the setpoint on display can be adjusted by

pushing the SEL λbutton. Increase value by pressing the + ▲button, or decrease the

value by pressing the

−

▼button. When the required value is reached, press the SEL λ

button to save the new value.

Time out

For setpoint adjustment during normal operation the controller will exit the setting after 20

seconds, and return to the main screen. However, for setpoint adjustment in PS mode, there is

no time limit. The controller remains in the PS mode until the user completes the entire process.

NOTE:

•Changing the heating setpoints to a lower value, set SP-h3 before setting SP-h2

and SP-h1.

•Changing the cooling setpoints to a higher value, set SP-c3 before setting SP-c2

and SP-c1.

•The controller will display an ‘out range’ message if SP-h3 > SP-h2>SP-h1 and

SP-c1>SP

-c2>SP-c3.

Document Number 129-409 RWD45U Controller Installation and Commissioning Guide

October 5, 2009

Page 10 of 13 Siemens Industry, Inc.

Main Display to PS Mode Press both buttons, and hold for five seconds to enter the PS mode. PS4 will appear

first.

Press the button to scroll down to the right PS for editing parameters.

Software Tool

(Optional

Commissioning)

A software tool for the controller application selection and parameter adjustment is

available. It is a user-friendly Windows® 95 (or later) based software tool. The software

tool has the following functions:

Adjusting all available parameters.

Uploading and downloading the program.

Saving parameter settings.

Viewing or providing a print-out of the settings.

Parameters can be hidden from displaying.

Commissioning

Flowchart

Figure 3. Commissioning Flowchart.

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