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Taco iWorx PSU1, Инструкция по применению

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iWorx® PSU1

505-012, Effective: August 10, 2012

21 

© 2012 Taco Electronic Solutions, Inc.

Network Inputs 

The PSU1 allows a network manager to write to Network Input Variables for the purpose of overriding the configuration, 
operation and outputs of the PSU1. The network input variables are listed below.

Values written to NVIs have absolute priority over any other controller operation.

•

nviOccCmd 

is a legacy, unused network variable. Overriding this variable does not affect controller operation.

•

nviResetRuntime

 is a command to reset the pump runtimes displayed on the web interface. If the value sent is 0, 

then no reset occurs; if the value sent is 1, then the runtimes are reset.

•

nviSysTime

 is a time stamp to set the date and time. Writing to this variable changes the time on the device and 

affects all time-related functions such as schedules.

•

nviOutOverride

 is a structure (defined below) that overrides the digital and analog hardware outputs on the PSU1. 

These values allow the network controller to directly control the analog and digital outputs of the board. 

NOTE:

 the PSU1 makes no attempt to interpret the outputs; assigning meaningless outputs may have 

unpredictable results.

Network Variable Inputs (NVIs)

Output Override Structure (NVI)

Internal Variable 

Name

Format

Range

Description

nviOccCmd

SNVT_occupancy

N/A

Legacy; not used

nviResetRuntime

SNVT_lev_disc

0 = no reset 
1 = reset runtimes

Resets the pump run-
times

nviSysTime

SNVT_time_stamp

Date/Time

System time

nviOutOverride

Structure

Structure

Output override

Name

Type/Range

Default

Description

digOut[8]

Unsigned Byte:
0=OFF
1=ON
0xFF=no override

0xFF
0xFF
0xFF
0xFF
0xFF
0xFF
0xFF
0xFF

digOut[0] = TO1 (pin 31) 
digOut[1] = TO2 (pin 29) 
digOut[2] = TO3 (pin 28) 
digOut[3] = TO4 (pin 26)
digOut[4] = TO5 (pin 25) 
digOut[5] = TO6 (pin 23) 
digOut[6] = TO7 (pin 22) 
digOut[7] = TO8 (pin 20)

aOut[4]

SNVT_lev_percent:
0% to 100%
32767=no override

32767
32767
32767
32767

aOut[0] = AO 0 (pin 37) 
aOut[1] = AO 1 (pin 35) 
aOut[2] = AO 2 (pin 34) 
aOut[3] = AO 3 (pin 32) 

fpOut[4]

SNVT_lev_percent

N/A

Not used

Содержание iWorx PSU1

Страница 1: ...Included with this Equipment 5 Equipment Location 5 Selecting a Power Source 6 Installation 6 Mounting the Device 6 Routing Cabling to the Device 7 Grounding the Device 8 Wiring Information 8 Connecting Input Devices 11 Connecting Output Devices 12 Other Connections 12 Specifications 13 Electrical 13 Mechanical 14 Application Description 14 Sequence of Operation 15 Operational Modes 15 Auto Flow R...

Страница 2: ...iWorx PSU1 2 505 012 Effective August 10 2012 2012 Taco Electronic Solutions Inc THIS PAGE LEFT BLANK INTENTIONALLY ...

Страница 3: ...n and basic LON WORKS networking and communications This application manual is written for Users who engineer control logic Users who set up hardware configuration Users who change hardware or control logic Technicians and field engineers REPRESENTATIONS AND WARRANTIES This Document is subject to change from time to time at the sole discretion of Taco Electronic Solutions Inc All updates to the Do...

Страница 4: ...ing this equipment Work in a static free area Touch a known securely grounded object to discharge any charge you may have accumulated Use a wrist strap when handling printed circuit boards The strap must be secured to earth ground Description Audience Purpose iWorx network interface description document file name iWorx_IDS_117 doc Application Engineers Installers Service Personnel Start up Technic...

Страница 5: ...on the user is encouraged to try to correct the interference by one or more of the following measures Reorient or relocate the receiving antenna Increase the separation between the equipment and the receiver Connect the equipment to a power source different from that to which the receiver is connected Consult the equipment supplier or an experienced radio TV technician for help You are cautioned t...

Страница 6: ...otection can be integral to the load or installed in the 24 VAC wiring across the load s coil To provide necessary RFI and transient protection the controller s ground GND pin T40 must be connected to earth ground or the earth ground of the packaged unit s enclosure ground Failure to properly ground the controller may cause it to exceed FCC limits Excessive noise could also produce inaccurate sens...

Страница 7: ...12 Taco Electronic Solutions Inc Figure 1 Mounting Dimensions Routing Cabling to the Device Cabling used to connect the power source and cabling used to connect the FTT 10A network must remain separated within the control enclosure and wiring conduit ...

Страница 8: ...sk of electrical shock and may increase the possibility of interference with radio TV reception For best performance connect the power supply common terminal T38 to the same external point as the ground terminal T40 WIRING INFORMATION WARNING Terminals 4 6 9 12 15 18 and 38 are connected internally on all PSU1 controllers Discon nect ALL power sources when installing or servicing this equipment to...

Страница 9: ...iWorx PSU1 505 012 Effective August 10 2012 9 2012 Taco Electronic Solutions Inc Figure 3 PSU1 Wiring Example Power Sinking ...

Страница 10: ...iWorx PSU1 10 505 012 Effective August 10 2012 2012 Taco Electronic Solutions Inc Figure 4 PSU1 Wiring Example Power Isolated ...

Страница 11: ...one wire from the sensor to RWT T17 and the other wire to the adjacent common T18 Please refer to the Wiring Information for the sensor types and the corresponding DIP switch settings This sensor is required for pump staging or modulation Pump Flow Proof PFP To connect the Pump Flow Proof sensor to the unit attach one wire from the sensor to PFP T16 and the other wire to the adjacent common T15 Th...

Страница 12: ...rol signal input of the pump connects to the 0 10V outputs of the PSU1 Connect MOD1 T37 to load Use COM T36 as common Connect MOD2 T35 to load Use COM T36 as common Other Connections Network LON Network wiring must be twisted pair One network wire must be connected to terminal NETA T1 and the other network wire must be connected to terminal NETB T2 Polarity is not an issue since an FTT 10A network...

Страница 13: ...Power Requirements 24VAC 20VAC to 28VAC requires an external Class 2 supply Power Consumption 7 2W with no external loads maximum limited by the Class 2 supply rating Recommended Sensor Wire FTT 10A Network Speed 78KBPS 42 4 Volts DC max Cabling Maximum node to node distance 1312 feet 400 meters Maximum total distance 1640 feet 500 meters For detailed specifications refer to the FTT 10A Free Topol...

Страница 14: ...bytes SRAM 8 Kilobytes Termination 0 197 5 0 mm Pluggable Terminal Blocks 14 22 AWG Environmental Temperature 32 F to 140 F 0 C to 60 C Humidity 0 to 90 non condensing Agency Listings UL Listed for US and Canada Energy Management Equipment PAZX and PAZX7 Agency Compliances FCC Part 15 Class A APPLICATION DESCRIPTION The PSU1 is intended for control of two primary pumps and can either extend the fe...

Страница 15: ...automatic changeover between heating and cooling systems at the point where Delta T is 0 F SEQUENCE OF OPERATION This section describes the detailed sequence of operation for the PSU1 control strategy Operational Modes The four primary modes of operation for sequencing primary pumps are described below Table 1 Operational Mode Features Single Mode If only one pump is used or if one pump is unavail...

Страница 16: ...expired The pump ramps down at a rate defined by Pump Mod Set Ramp Down After the time period specified by Pump Settings Post Purge Time has elapsed the lead pump turns off and the lag pump is turned on If Enable Alarm setting is not Disabled the Pump Flow Proof switch continues to be monitored for an open state and switches pumps after the configurable delay if necessary The pumps are not rotated...

Страница 17: ... timer to zero and another day of successful operation must occur before the Restarts Left output value is restored While in Flow Recovery Mode the Flow Recovery Mode output on the LCI displays Yes When Flow Recovery Mode displays Yes and Restarts Left displays 0 the controller is in Flow Recovery mode but no longer able to attempt an automatic reset Flow is not monitored Since a successful automa...

Страница 18: ...12 2012 Taco Electronic Solutions Inc Figure 8 Example Auto Flow Recovery Sequence NOTE This flow chart depicts Auto Flow Recovery behavior in Standby Mode with an active demand input Unrelated operational behavior has been intentionally omitted ...

Страница 19: ...t hours or alternating The specific pump choices are Pump 1 or Pump 2 The Lowest Hours setting automatically chooses the pump with lowest runtime hours when there is a call to run If both pumps have equal runtimes then preference is given to Pump 1 If the Alternating setting is chosen then the lead pump alternates on each call to run Constant Circulation If the Const Pump Circ setting is On a prim...

Страница 20: ...e failed Flow Recovery is active and flow has not been detected for twice the duration configured under Flow Delay Circulation Water Temp alarms A temperature alarm is communicated to the LCI under the following conditions Circulation Supply Water Temp High Circulation Supply Water Temp Low Circulation Return Water Temp High Circulation Return Water Temp Low A Temp High alarm is generated when mea...

Страница 21: ...es the digital and analog hardware outputs on the PSU1 These values allow the network controller to directly control the analog and digital outputs of the board NOTE the PSU1 makes no attempt to interpret the outputs assigning meaningless outputs may have unpredictable results Network Variable Inputs NVIs Output Override Structure NVI Internal Variable Name Format Range Description nviOccCmd SNVT_...

Страница 22: ...e Pump Flow Proof switch Delta T 0 to 260 F 0 to 144 4 C Differential temperature between the supply and return temperature readings Name Range Description Output Status Structure as defined in a table below General pump status Pump 1 Adjust Structure as defined in a table below Pump 1 commissioning and runtime Pump 2 Adjust Structure as defined in a table below Pump 2 commissioning and runtime Pu...

Страница 23: ...r Temp Alm Structure N A Auto Recovery Structure N A Auto Flow Recovery settings Setting Range Default Description Operational Mode Standby Single Equal Runtime 2 Stage Single Operating sequences of the two pumps Const Pump Circ Off On Off Causes pumps to run continuously regard less of demand Lead Pump Sel Pump 1 Pump 2 Lowest Hours Alternating Pump 1 Determines the pump selection method to use w...

Страница 24: ...lation level when Pump 1 Comm is set to Enable Pump 2 Mod 0 to 100 0 Sets the pump 2 modulation level when Pump 2 Comm is set to Enable Setting Range Default Description Gain 4 to 5 0 Sets PI loop gain On 0 to 100 50 Minimum modulation level while pump is on Modulation level will be 0 when pump is off and will vary between On and 100 when pump is on Ramp Up 0 00 to 20 00 1 00 Ramp up percent per s...

Страница 25: ...m Low Limit 1 F Circulation Pump 1 Failed Alarm Normal Alarm Occurs when there is Demand Pump 1 is selected Enable Alarm is not Disabled and no flow has been detected for Flow Delay sec onds Reset the controller power cycle Circulation Pump 2 Failed Alarm Normal Alarm Occurs when there is Demand Pump 2 is selected Enable Alarm is not Disabled and no flow has been detected for Flow Delay sec onds R...

Страница 26: ...fer to the LCI documentation for more information on resetting the controller using the LCI The Supply or Return Water Temper ature thermistor reading is at its maxi mum or minimum The input is either shorted or open Thermistor readings fluctuate rapidly sometimes by several degrees The controller is not properly grounded The controller s ground GND pin T40 must be connected to earth ground Also e...

Страница 27: ...m with a unit follow the steps below before contacting your local TES representative or TES technical service 1 Make sure controllers sensors and power supplies are connected and communicating to desired devices 2 Record precise hardware setup indicating the following Version numbers of application software Device and or firmware version number A complete description of difficulties encountered No...

Страница 28: ...covered by this warranty TES products are not intended for use to sup port fire suppression systems life support sys tems critical care applications commercial aviation nuclear facilities or any other applica tions where product failure could lead to injury to person loss of life or catastrophic property damage and should not be sold for such pur poses If in doubt as to whether a particular produc...

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