RWD68U Controller Installation and Commissioning Guide Document No. 129-411 Function Application The RWD68U is a three-input, two-output device used to control temperature, humidity, air pressure, fluid pressure, air/fluid velocity, and air quality in commercial and industrial facilities. The RWD68U is used for comfort control in HVAC systems. One digital output () for one stage of on/off control, and one analog output with voltage from 0 to 10 Vdc are provided. The main analog input can be set as F, C, % or none specified (-----). The default is F. The second analog input (X2) can be used for the following applications: PI Limiter function (absolute and relative limit) Remote setpoint function Setpoint compensation Winter/summer mode changeover (analog or digital input) (reversal of heating/cooling output) Cascade control function Maimum priority for cooling/dehumidifying A separate digital input (D1) is provided for day/night mode changeover The RWD68U controller is intended for either DIN rail mounting in a switchboard or screw mounting with a protective enclosure. Desired output configuration and auiliary function must be entered for initial set-up. See Service (PS) Mode Screen Sequence. Item Number 129-411, Rev. 010
Document Number 129-411 H = Heating, C = Cooling, (1st digit = Main Control Loop, 2nd digit = Auiliary Control Loop) Main Loop Auiliary Loop #1 H Sequence Table 1. Application Numbers. #2 H+H Dependent #3 H+H Independent RWD68U Controller Installation and Commissioning Guide #4 Digital H + Analog C #5 Analog H + Digital C #6 C+C or D+D Dependent #7 C+C Independent #8 C Sequence #0 No auiliary #10 #20 #30 #40 #50 #60 #70 #80 #1 Remote setpoint #11 #21 #31 #41 #51 #61 #71 #81 #2 Absolute limiter #12 #22 #32 #42 #52 #62 #72 #82 #3 Relative limiter #13 #23 #33 #43 #53 #63 #73 #83 #4 Compensation shift #14 #24 #34 #44 #54 #64 #74 #84 #5 Cascade - #25 #35 #45 #55 #65 #75 - #6 Win/Sum digital #16 - #36 #46 #56 - - - #7 Win/Sum analog #17 - #37 #47 #57 - - - #8 Ma. priority - - - #48 - #68 #78 - #9 Main loop (active input) #19 #29 #39 #49 #59 #69 #79 #89 NOTES: 1. Application sheets for the listed applications are available online. 2. The analog heating sequence output is set to Direct Acting (default). This is typically used for normally open valves. Output can be set to reverse acting by changing the MIN and MAX value. See PS4. 3. The analog cooling sequence output is set to Direct Acting (default). This is typically used for normally closed valves. Output can be set to reverse acting by changing the MIN and MAX value. See PS4. Display Eplanation Symbol Description Setting Range Symbol Description Setting Range Main Screen + Adjustable setting TOOL PC communication port screen being used - #10 Application Numbers 10 through 89 (Not OUT The setting is out of range consecutive numbers) RANGE Daytime operation Err Sensor error Night time operation #10 H H = Using, not the defaulted sensor Universal (Main) Input WIN/SUM X2 Universal (Auiliary) Input X2 Siemens Ni 1000 Ω: - 58 F to 302 F (-50 C to 150 C) (unchangeable) Pt 1,000 Ω: -4 to 356 F (-20 C to 180 C) (unchangeable) 0 to 10Vdc: -100 to 8,000 Siemens 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 to 10 Vdc: -100 to 8,000 Variable resistor: the resistance range should be within 0 to 1000 Ω Q1 Digital output is On, is Off REM Y1 Analog output 0 to 10 Vdc COMP LIM Winter/Summer mode being chosen or activated Limiter mode being selected or activated Remote setpoint mode being selected or activated Setpoint compensation mode being selected or activated Page 2 of 10 Siemens Building Technologies, Inc.
RWD68U Controller Installation and Commissioning Guide Document Number 129-411 Display Eplanation, Continued Symbol Description Setting Range Symbol Description Display, Setting Commissioning Screen On On status CAS Cascade mode being chosen or activated Off Off status MaPrior Maimum priority mode being selected or activated C Celsius scale SP-1 Setpoint 1 F Fahrenheit scale SP-2 Setpoint 2 K Kelvin SP-h Setpoint on the heating side for temperature control. % Percentage scale (e.g., rh) ---- No unit (e.g., pressure, air quality and air volume flow) Sec Second SP-c XDZ Setpoint on the cooling side for temperature control. For H + C application. Dead zone between H and C day setpoints when in REM mode. PS1 PS2 PS3 Parameter setting mode: Application No. set-up Parameter setting mode: Defining Unit and X2 Parameter setting mode: Auiliary control Programming Screen PS4 PS Net PS Eit Parameter setting mode: Main control loop setting To enter the net parameter setting To eit the entire parameter setting mode PS4 Main Control Loop Set-up T1 Minimum switch off time for 0 to 255 seconds SD Switching differential 0.05 to 7,300 Q1 TN Integral action time for Y1 0 to 4,096 seconds MIN Output end point for Y1 0 to 100% XP Proportion band for Y1 0.05 to 7,300 (depends on ) MAX Output end point for Y1 MIN to 100% or 0% to MIN PS3 Auiliary Control Loop Set-up XP-h Proportion band for heating T 0 to 4,096 sec XP-c XP-1 XP-2 TN-h TN-c TN-1 Proportion band for cooling Proportion band for Y1 output Proportion band for Y2 output Integral action time for heating Integral action time for cooling Integral action time for Y1 output Ni:1 F to 360 F (0.5 to 180 K) Pt: 1 F to 360 F (0.5 K to 180 K) Active input: 0.05 to 7,300 Ni:1 F to 360 F (0.5 K to 180 K) Pt: 1 F to 360 F (0.5 K to 180 K) Active input: 0.05 to 7,300 Active input: 0.05 to 7,300 Active input: 0.05 to 7,300 Time elapsed to allow net winter/summer changeover (Y1 only for 36, 37, 56, and 57; Q1 only for 16, 17, 46, and 47 Compensation shift (Start point, End point and Shift differential) MAX Maimum Limiter -80 to 8,000 MIN Minimum Limiter -100 to 7,980 0 to 4,096 sec WIN Winter changeover point -100 to 8,000 0 to 4,096 sec SUM Summer changeover point -100 to 8,000 0 to 4,096 sec TN-2 Integral action time for Y2 output 0 to 4,096 sec Siemens Building Technologies, Inc. Page 3 of 10
Document Number 129-411 RWD68U Controller Installation and Commissioning Guide Display Eplanation, Continued Symbol Description Setting Range Symbol Description Display, Setting Programming Screen PS 2 Unit and X2 Sensor Type and Sensing Range Definition UNT Define unit F, C, %, or --- (no unit display) Calibration offset for (Ni and Pt sensor only) LS is Siemens Ni Ni 1000 Ω: -58 F to 302 F X2 Calibration offset for X2 1000 Ω (-50 C to 150 C) (Ni and Pt sensor only) temperature (unchangeable) sensor X2LS X2 is Siemens Ni 1000 Ω temperature sensor Pt is Platinum Pt 1000 Ω temperature sensor X2Pt X2 is Platinum Pt 1000 Ω temperature sensor 0 to 10 is 0 to 10 Vdc input sensor X2 0 to 10 X2 is 0 to10 Vdc input sensor 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) Pt 1000 Ω: -4 F to 356 F (-20 C to 180 C) (unchangeable) L X2 L H Start point of the (for 0 to 10 Vdc only) Start point of the X2 (for 0 to 10 Vdc only) Stop point of the (for 0 to 10 Vdc only) -9 F to 9 F -5 to 5 K -9 F to 9 F -5 to 5 K -100 to 8,000-100 to 8,000-100 to 8,000 0 to 10 Vdc: -100 to 8,000 X2 H Stop point of the X2-100 to 8,000 (for 0 to 10 Vdc only) 0 to 10 Vdc: -100 to 8,000 X2VR Variable Resistor 0 Ω to 1000 Ω PS 1 Application No. Selection: LIM ABS WIN/SUM dig Act Absolute Limiter Winter/Summer changeover by digital input Active sensor input LIM rel WIN/SUM AnLG Relative Limiter Winter/Summer changeover by analog input Page 4 of 10 Siemens Building Technologies, Inc.
RWD68U Controller Installation and Commissioning Guide Document Number 129-411 Table 2. PS 3 Auiliary Function Parameter Set-up. Parameter Description #1 REM XDZ Dead zone or offset (see the above eplanation) MAX Value to start Limiter cooling MIN Value to start Limiter heating XP-h P-band in Limiter heating XP-c P-band in Limiter cooling TN-h Integrating time heating TN-c Integrating time cooling COMP start point heating/reverse acting #2 LIM #3 LIM Auiliary Number: #4 #5 #6 COMP CAS WIN/SUM #7 WIN/SUM COMP end point heating/reverse acting Adjustment in heating/reverse acting COMP start point cooling/direct acting COMP end point cooling/direct acting Adjustment in cooling/direct acting MAX Maimum of virtual setpoint MIN Minimum of virtual setpoint XPh1 First heating/reverse acting P-band in cascade XPc1 First cooling/direct acting P-band in cascade WIN As X2 < WIN, Y1 (or Q1, depending on application number) is reverse acting SUM As X2 > SUM, Y1 (or Q1, depending on application number) is direct acting T Time elapsed to allow net winter/summer changeover (Q1 only) There are no PS3 auiliary function parameters for applications #8 and #9. Operating Modes The controller has three operating buttons for the following functions: SEL This button is used to enter or save the value adjustment. These operating buttons are used for viewing and adjusting parameters Time-out For setpoint adjustment in Normal mode, the controller will automatically eit the setting after 20 seconds. However, there is no time limit for setpoint adjustment in Service (PS) mode. The controller remains on the PS mode until the user completes the entire process. NOTES: Only those parameters that apply to a particular program appear on the display or in the sequence in commissioning. For eample, if the second analog input is not used, X2 values and selections will not appear. A software tool for controller application selection and parameter adjustment is available (Tool Kit CD, P/N 125-3481). It is a user-friendly Windows 95 (or later) based software tool which provides you with a printout of the controller settings. Parameters can be hidden from display by using the software tool. Siemens Building Technologies, Inc. Page 5 of 10
Document Number 129-411 Main Display Q1 72 F The main display shows: RWD68U Controller Installation and Commissioning Guide Whether Q1 and Q2 are On or Off ( is On, is Off) Y1 output in Volts dc (0 to 10 Vdc will be displayed as 0, 1, 2 through 10). Whether day or night setpoint is selected ( = day, = night ). value in C, F, % or no unit. Other displays are available by pressing the + button. The various displays are listed below in sequence from the main display. On entering any of the setpoint displays, the setpoint on display can be adjusted by pushing the SEL button. Increase value by pressing the + button, or decrease the value by pressing the button. When the required value is reached, press the SEL button to save the new value. Alternative displays return to the main display after 20 seconds. Table 3. Main Display. Action Typical Display Selected Display Comments Push --- Q1 Y1 Y1 SP h 66.0 F (19.0 C) Q1 SP c 70.0 F (21.0 C) Y1 SP h 59.0 F (15.0 C) Q1 SP c 77.0 F (25.0 C) 68.0 F (20.0 C) X2 50.0 F (10.0 C) Q1 Off Y1 5.0 After 20 seconds any page will return to the main default page if left unattended. #43 Q1 Y1 Default page includes: reading, Q and/or Y output status Day/night setpoint selection status Setpoint page, setting value displayed and is adjustable: First stage heating or cooling, direct or reverse day acting setpoint, depending on application. Setpoint page, setting value displayed and is adjustable: Second stage heating or cooling, direct or reverse day acting setpoint, depending on application. Setpoint page, setting value displayed and is adjustable: First stage heating or cooling, direct or reverse night acting setpoint, depending on application Setpoint page, setting value displayed and is adjustable: Second stage heating or cooling, direct or reverse night acting setpoint, depending on application Room sensor reading X2 Auiliary sensor reading Output page: output status displayed First stage Q1 digital status On or Off (depending on application) Output page: Output value or status displayed. Second stage Y1 value in Vdc (depending on application) Application number and control sequence diagram Back to main default page Page 6 of 10 Siemens Building Technologies, Inc.
RWD68U Controller Installation and Commissioning Guide Document Number 129-411 Service (PS) Mode Screen Sequence Commissioning Flowchart Press both buttons + and and hold for five seconds to enter the Service Mode. Press + for viewing the net page or to increase value. Press for viewing the previous page or to decrease value. Press to enter the PS page or edit and save the value when the page appears with the logo. On entering service (PS) mode, PS4 appears first. For initial setup, proceed directly to PS1 and enter your desired application number first. PS1 will already be opened if power has never been connected to the new controller. See Figure 1 (*) PS2 to PS4 parameters may need to be adjusted for service/commissioning purposes. Q1 Y1 74 F Main loop - Switching differential - Switching delay time - Proportion band - Integral time - Output for minimum end - Output for maimum end - Day/night setpoint - Winter/summer setpoint Auiliary loop - Ma/Min limiter - Proportion band - Integral time - Compensation shifts start/end point - Winter/Summer changeover temp. and time delay Define unit, & X2 - Define the unit as o F, o C, % or no unit - Sensor type - Sensing range - Calibration offset - Day/night setpoint - Winter/summer setpoint New controller applica and setpoint sequenc Application no. - Application no. selection (wait 2 seconds) RWD0414R1 Normal programming * New controller Figure 1. Commissioning Flowchart. Siemens Building Technologies, Inc. Page 7 of 10
Document Number 129-411 RWD68U Controller Installation and Commissioning Guide Wiring Terminals Wiring Diagram TH0764R1 24 V SP 24 V SN G GO CAUTION: TH0763R1 G G0 G G B M B M M TOOL PC Y1 D1 M M X2 M M Q11 Q14 Q12 Figure 2. Wiring Terminals. X2 M X2 M GO D1 Y1 Y.. G Y1 S1 Figure 3. Wiring Diagram. M Q11 Q1 Q12 Q14 N1 E1 Tool G, G0 24 Vac supply (SELV 24 Vac power supply) M Ground (G0) for signal inputs and universal inputs Signal input (main input: Siemens Ni 1000, Pt 1000 and 0 to 10 Vdc) X2 Signal input (Au. Input: Siemens Ni 1000, Pt 1000, 0 to 10 Vdc and remote setting unit) Y1 Analog output (0 to 10 Vdc) Q... Digital output, various voltages permissible (24 to 240 Vac/ 6A res/ 5 FLA/ 30 LRA/ 1/2 HP) D1 Digital input Tool Communication port with PC (9-pin plug) E1 N1 PC Q1 S1 SN SP X2 Y1 Electrical load (twoposition) RWD68U Controller Personal computer (optional) Potential-free relay contacts for two-position control Time clock or switch System neutral System potential Main input (Termination G appears when is an active sensor) Auiliary input or remote setpoint (Termination G appears when X2 is an active sensor) Valve actuator/damper actuator The TOOL signal ground is galvanically connected to G0 inside the controller. If the signal line of the computer is grounded to Earth, the G0 line after TOOL connection will be grounded as well. This will change the SELV to a PELV. Page 8 of 10 Siemens Building Technologies, Inc.
RWD68U Controller Installation and Commissioning Guide Document Number 129-411 Installation Mounting Notes TH0741R1 A B C D Figure 4. Mounting Options. The RWD68U can be mounted as follows: Observe all local installation and mounting regulations. A B C On a DIN rail (EN 50 022-35 7.5) at least 4.75 inches (120 mm) long for RWD68U. Wall-mounted with two screws. (Minimum length of the screws should be 1.5 inches (40 mm) long φ1/8" (φ3.2 mm) Front-mounted using standard elements: One DIN rail 6 inches (150 mm) long for RWD68U Two heagonal placeholders 2 inches (50 mm) Washers Screws NOTE: (Ensure all terminations are tightened before final mounting to front panel.) D Inside the ARG62.21. WARNING: There must be a minimum of 1/32 inches (8 mm) distance from terminations to panel/enclosures to avoid electric shock. Electrical Installation Notes Standard cables can be used for the controller. However, when mounting in an environment greatly eposed to EMI, use only shielded cables. The RWD68U is designed for 24 Vac operating voltage. Use safety insulating transformers with double insulation as per EN 60742; they must be designed for 100% Duty. When using several transformers in one system, the connection terminals G0 must be galvanically connected. Supplying voltages above 24 Vac to low voltage connections may damage or destroy the controller or any other connected devices. Additionally, connections to voltages eceeding 24 Vac endanger personal safety. Siemens Building Technologies, Inc. Page 9 of 10
Document Number 129-411 RWD68U Controller Installation and Commissioning Guide Dimensions In Inches (Millimeters) 0.16 (4) 5.12 (130) 4.37 (111) 2.22 (56.5) 1.89 (47.9) 1.22 (31) TH0765R1 0.16 (4) 4.17 (106) 3.50 (89) 1.80 (45.7) Figure 5. RWD68U Dimensions. 5.91 (150) 2.41 (61.2) TH0745R1 7.87 (200) Figure 6. ARG62.21 Enclosure Dimensions. Information in this publication is based on current specifications. The company reserves the right to make changes in specifications and models as design improvements are introduced.. Windows is a registered trademark of Microsoft Corporation. Other product or company names mentioned herein may be the trademarks of their respective owners. 2004 Siemens Building Technologies, Inc. Siemens Building Technologies, Inc. 1000 Deerfield Parkway Buffalo Grove, IL 60089-4513 U.S.A. Your feedback is important to us. If you have comments about this document, please send them to technical.editor@siemens.com Document No. 129-411 Country of Origin: US Page 10 of 10