11.5.0 Diagnostics-------------------------------------------------------------------------------------17
1 1.5.1 LED Indicators -------------------------------------------------------------------------17
1 1.6.0 ProSof t Support, Service and Warranty-------------------------------------------------18
1 1.6.1.0 Technical Support-------------------------------------------------------------------18
1 1.6.2.0 Service and Repair-----------------------------------------------------------------18
COMPACT DISC (CD)1
T-31
EPROM (CPX.XNMn) in small black ESD box1
Check packaging for damage or missing components.
IMPORT ANT NOTICE: These instructions are intended for the use by qualified personnel only ,
specifically trained and experienced in the installation of this type of equipment and related system components. Installation and service personnel may be required by some states to be
licensed. If your state is such, be sure your contractor bears the appropriate license. Only qualified persons shall attempt to repair this equipment. Repair must be according to these instructions.
WARNING: Improper inst allation, adjustment, alteration, service or maintenance may damage
the equipment, create a hazard resulting in asphyxiation, explosion, fire, electric shock, personal
injury or property damage and will void the warranty .
CAUTION: ONE SUPPLY SOURCE. TO REDUCE THE RISK OF ELECTRIC SHOCK,
DISCONNECT ALL CONNECTIONS BEFORE SERVICING.
CAUTION: RISK OF ELECTRIC SHOCK, DISCONNECT SWITCH IS REQUIRED TO DEENERGIZE THE EQUIPMENT BEFORE SERVICING.
NOTE: Minimum 18 AWG, 105°C, stranded wire must be used for all low voltage (less than 30
volts) external connections to the unit. Solid conductors should not be used because they can
cause excessive tension on contact points. Install conduit as appropriate. All high voltage
wires must be the same size (105°C, stranded wire) as the ones on the unit or larger.
Thank you for selecting the Raypak B6000 Boiler Management System and the Raypak
Communication Interface. It is our sincere hope that you will enjoy its power , ease of use and
energy saving features.
Please follow the instructions carefully to insure proper installation.
FORWARD
The Raypak Communication Interface is designed to allow the Communication Interface System
to monitor and control the Raypak B6000 Boiler Management System.
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T-3 INSTALLATION AND MOUNTING
The T -3 Module should be mounted on a permanent base not subject to vibrations, moisture or
dust. It should be readily accessible, for serviceability .
DIMENSIONS AND WEIGHT
15 3/4” H14 LBS
8” W
5 3/4” D
MECHANICAL INSTALLATION
Mount the System Protocol Interface within five (5) feet of B6000 System Control Box.
The Gateway enclosure must be mounted vertically with conduit holes facing downward. Conduit
holes are provided to accommodate standard conduit fittings. Additional or larger conduit fittings that may be required should be located on the bottom of the module. Mount the Interface
with 3/8” or 1/4” hardware in four (4) places.
A Minimum of six (6) inches clearance on all sides is required and a minimum of eighteen (18)
inches clearance from the front is required for service access. The hinged side of the box is to
the right and the clearance (minimum 3” from bolt hole on the right side) should be sufficient to
open the cover .
A sub-panel containing the disconnect switches and surge suppressors is required at or near the
equipment location(s).
For accessibility remove the lower interior panel, by removing the four (4) access screws.
INST ALL CONDUIT AS APPROPRIA TE.
ELECTRICAL CHARACTERISTICS
120 V AC, 0.25A, 60 Hz
ELECTRICAL INSTALLATION
120 VAC FEEDER CIRCUITS
Install a surge protection device sized appropriately for your installation.
Install separate disconnect means for each load. Pull in appropriately sized wire for equipment
as defined by NEC and/or local code.
It is strongly recommended that the Communications Interface, B6000 System Control Module
and the B6000 Boiler Control Module be supplied from the same source power .
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WIRING T-3
1. Turn of f power to the B6000 System Control Box.
2. Open front door of System Protocol Interface Gateway Enclosure.
3. Remove four screws and the lower cover , revealing the field wiring blocks.
4. Attach wires from interface card to the field wiring side of left terminal block (N+, N-,
GND, NC). Refer to diagram in this user manual.
5. Open front door of the B6000 System Control Box.
6. Remove four screws and the lower cover, revealing the field wiring blocks in lower left.
7. Run RS-485 cable (provided) to the lower left field wiring terminal in the
B6000 System Control box. Attach wires to the upper four terminals as follows:
8. The EPROM (CPX.XNMn), in small black ESD box, must be installed in
place of the current EPROM.
9. View the B6000 System Control Board picture on the next page. Note location of
EPROM, U4.
10. Remove four screws holding upper panel with display screen and keypad. Carefully
remove upper panel and turn over exposing B6000 System Control Board, (see next
page).
1 1. Using ESD procedures carefully remove the EPROM from location U4.
12.Again using ESD procedures carefully install the EPROM labeled CPXXNM or CPXXM
into location U4.
13. Re-assemble B6000 System Control Box.
14. Turn power on to B6000 System Control Box.
15. Connect 120 V AC (hot, Neutral, ground) to T -3 at right terminal block.
16. Re-assemble.
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B6000 SYSTEM CONTROL BOARD
CHECK YOUR POWER SOURCE
AC = 108 Volts AC Minimum, 132 Volts MAX
AB = 108 Volts AC Minimum, 132 Volts MAX
BC = Must be less than 1.0 Volts AC
ing knowledge of the Raypak B6000 Boiler Control, and the application in which the combination is to be used. For this reason, it is
important that those responsible for implementing the T-3 satisfy
themselves that the T-3 and B6000 Boiler Control combination will
meet the needs of the application.
This manual is provided to assist the user. Every attempt has been
made to ensure that the information provided is accurate and a true
reflection of the product’s installation requirements. In order to ensure a complete understanding of the operation of the T-3 with B6000
Controller, the user should read all applicable Raypak documentation on the operation of the B6000.
The T -3 card is a hardware product designed to be the communications front end
for the Raypak B6000 Boiler Control and a modbus Master Host.
The product includes the following functionality:
Modbus Slave Specifications
•Protocol Modes:
RTU mode with CRC-16 error checking
•Supported Modbus Function codes:
2Read Input St atus
3Read Multiple Data Registers
4Read Input Registers
6Preset (Write) Single Data Register
8Loopback Test (T est 0 only)
•Supports broadcast commands from host
•RS-485 electrical interface
Raypak B6000 Interface
•RS-485 electrical interface
•Emulates Raypak Modem address and functionality
General Specifications
•Configurations via dip switches
Slave Address, Baud and Parity
Hardware Specifications
•4” X 5” form factor
•Two male 9-pin D Shell connectors
•Communications St atus lights - Active and Fault for each port
•9 to 30 VDC external power
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11.2.0
Slave Port Functionality
11.2.1
Modbus Communications
The T -3 Modbus Slave card runs the RTU version of the Modbus protocol. This capability
allows the module to communicate data from a Raypak B6000 Boiler Control to a Modbus
Master host, and vice-versa. The module supports both point-to-point implementation as
well as multi-drop implementations.
The following discusses the functional capabilities of the T -3 card.
1 1.2.1.1Command/Reply Cycle
Successful communications between the card and a host will always consist of the following two transactions:
Command: Message from master giving instruction to slave.
Reply: Response to command.
A slave station will respond to a master issued command inseveral ways.
Data Message: If the command was executed by the T -3 board, the re-
sponse message will include the data requested, or an acknowledgement that the command was executed.
Error Message: If the command could not be executed by the T -3
board, for whatever reason, an error response message is transmitted to
the master. The error response message consists of the original function
code (ORed with 80hex) and error code.
No Reply: If the master does not detect a reply within its time-out period, the master should retransmit the command, before a time out error is
issued. If the Slave could not decode the message or an error occurred
preventing the Slave from recognizing the message, no response will be
issued.
11.2.1.2Command T ypes
The T -3 can respond to three types of commands from the master;
read data, write data, and a diagnostic command. These are overviewed
below:
Read Data:The following type of data read commands are supported:
2Read Input S tatus
3Read Multiple Registers
4Read Input Registers
Write Data:The Following data write command is supported:
6Single Register Write
Diagnostics:The diagnostic command is supported:
8Loopback test - Code 0
11.2.1.3Command Error Checking
When the T -3 cannot execute a command, an error code is generated and
returned to the master. Error codes generated at the slave will usually be
indicative of an illegal function, an illegal address, bad data, or the inability
to complete a transaction because of a network problem.
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11.2.1.4Data Integrity
As in all good protocols, there must exist a level of data integrity
checking to verify , with some degree of assurance, the quality of
the transmitted data. The Modbus protocol supports two types of
error checking:
•RTU Mode: 16 bit cyclic redundancy check (CRC-16)
•One bit parity check
CRC-16: When the master generates a message, a 16 bit CRC
value is added to the end of the transmitted packet. The CRC
value is generated using a series of the bit shifts and manipulations.
The receiving station executes the same calculation of the data
and verifies the transmitted CRC. Any discrep ancy will cause the
message to be disregarded.
Parity: Parity checking can be added as an additional level of data security .
If parity checking is selected, even or odd parity can be implemented.
11.2.2Modbus Register Map
A predefined register map has been provided for the T-3 unit. This
map is detailed in Appendix A.
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11.3.0
Hardware Setup
11.3.1.11500 Interface Card Setup
11.3.1.1 Connecting Power to the T-3 Card
The T -3 Card requires an external source of DC voltage. The
DC source voltage should be between 9V and 30V . The power is
connected to TB1, located near the two 9 pin serial port connections.
The connection to TB1 is as follows:
TB1-19-30 VDC (+)
TB1-2Common (-)
11.3.1.2 Dip Switch Configuration
The T -3 card is configured primarily through two sets of dip
switches. These switches are read initially on power up only .
The function of the dip switches is as follows (a value of one (1)
is registered when the a switch is in the ON position):
1Baud Rate1Address Bit 0 Value = 1
2Address2Address Bit 1 Value = 2 -
3Select3Address Bit 2 Value = 4
44Address Bit 3 Value = 8
55Address Bit 4 Value = 16
66Address Bit 5 Value = 32
77Address Bit 6 Value = 64
88Address Bit 7 Value = 128
12
*
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Example Addresses = 0 to 33Example Addresses = 34 to 63
The parameters are defined as follows:
Modbus Slave Address: Each of the separate drop offs of a Modbus
host must have a different slave address. The slave address is
selected by encoding the slave address in a binary form using the
dip switches.
11.3.1.3 T-3 Jumper Configurations
The T-3 card has five sets of jumpers on the board. Generally, the
default jumper positions will be adequate for most applications, with
JP4 and JP5 being the only jumpers that should ever need to be
reviewed. For completeness, we provide the following discussion on
all the jumper locations:
JumperDescriptionPositioningDefault
JP1Hardware ResetNot Used
JP2Raypak Port1-2 Non-Isolated Power1-2
The B6000 communications interface has been hard coded (i.e., no dip switches
are required to configure this port) to operate at the following default conditions:
Baud9600
ParityNone
Stop Bits2
The T-3 card emulates the modem card that is normally connected to the
B6000 Controller.
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11.4.0Modbus Protocol Support
11.4.1Modbus Commands
The T -3 card supports a command subset of the Modbus S pecification consisting
primarily of the Function Codes required to read and write data. The following sections
detail the different commands supported by the card.
2Read Input Status10001Module returns binary data from the
to“Input Status” register space.
10331 & 10833
3Read Multiple40001The Module returns word data from
Registers tothe register space. The module will
4Read Input Registers30001The module returns data from the
6Single Register Write40001 to 40030 This is a register write command
40133 to 40138 the B6000 unit by writing a register
40138support up to 125 words of data in
one command.
to“Input register” space in the module.
30138 The module will support up to 125
words of data in one command.
andallowing a host to change values in
value.
8Loopback TestTest 0This is a diagnostic command which
11.4.2Modbus Error Codes
The T -3 card supports the following Modbus Error Codes:
CodeNameDescription
0All OKThe module is operating as desired
1Illegal FunctionsAn illegal function code request is being attempted
2Bad Data AddressThe address, or the range of addresses, covered by
3Bad Data ValueThe value in the data field of the command is not
4Incomplete ResponseThis error indicates that an incomplete response was
Detectedreceived to a master query. Often this will indicate
6Module BusyThe module busy status code is returned when a
echoes the command sent.
a request from the master are not within allowed
limits.
allowed.
that the slave device may be responding too quickly
or that there may be excessive noise on the line.
write command from the master has not yet been
completed when a second write command is received
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11.5.0Diagnostics
Several hardware diagnostics capabilities have been implemented using the LED indicator lights on
the front of the T-3 card. The possible conditions as indicated by the lights are:
11.5.1LED Indicators
Several hardware diagnostics capabilities have been implemented using the LED indicator
lights on the front of the module. The possible conditions as indicated by the lights are:
NameLEDColorStatusIndication
Modbus (P1) D1GreenBlinkingThe T-3 is receiving a command
ACTIVE from the Modbus Host
Raypak (P2)D2GreenBlinkingThe T-3 is processing a B6000
ACTIVEcommand
Modbus (P1)D3Red ONThe Modbus port has detected a
COMM orcommunications error condition.
ERRBlinkingSee Section 4.2
SteadyThe T-3 is not detecting a valid
ONcommand. If the master is
ortransmitting, be sure all dip
OFFswitches are set correctly and that
the cable connection is correct.
SteadyCheck cable connection to verify
ONpolarity of terminations between
orT-3 card and B6000 (See Appen OFFdix B)
OFFNo error conditions at this time.
Raypak (P2)D4Red ONThe T-3 card has detected a
FAULTcommunications error condition.
OFFNo error conditions at this time.
Should the configuration dip switches select an invalid address or an
invalid baud rate, the LED indicators will alternate in the on/off fashion
on 1/2 second intervals until correct values are selected.
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11.6.0ProSoft Support, Service and Warranty
11.6.1Technical Support
ProSoft Technology survives on its ability to provide meaningful support to its customers.
Should any questions or problems arise, please feel free to contact us at:
ProSoft T echnology , Inc.
9801 Camino Media
Suite 105
Bakersfield, CA 9331 1
(805) 664-7208
(805) 664-7233 FAX
Before calling for support, please prepare yourself for the call. In order to provide the best
and quickest support possible, we will most likely ask for the following information (you
may wish to fax it to us prior to calling):
1. Product Serial and V ersion Number
2. T -3 Configuration Information
-Dip Switches
-Jumpers
-Communication cabling
11.6.2Service and Repair
The T -3 card is an electronic product, designed and manufactured to function under
somewhat adverse conditions. As with any product, through age, misapplication, or any
one of many possible problems, the card may require repair.
The T -3 product has a one year parts and labor warranty according to the limit s
specified in the warranty . Replacement and/or returns should be directed to the distributor or Original Equipment Manufacturer from whom the product was purchased. If you
need to return the card for repair, it is first necessary to obt ain an RMA number from
ProSoft Technology. Please call the factory for this number and display the number
prominently on the outside of the shipping carton used to return the card.
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LIMITED WARRANTY
T-3
SCOPE OF WARRANTY:
Raypak, Inc. (“Raypak”) warrants to the original owner the T-3 to be free from defects in materials and workmanship under nor mal
use and service for the applicable warranty period. In accordance with the terms of this Limited Warranty, RAYPAK will furnish a
replacement or repair, at our option, any defective part which fails in normal use and service during the applicable warranty period. The
replacement or repair will be warranted for only the unexpired portion of the original Warranty Period.
APPLICABLE WARRANTY PERIOD
The effective date of warranty coverage is the date of original installation, of the Control System, by a qualified electrician or by a
RAYPAK authorized service technician. The Applicable Warranty Period is one (1) year from the effective date.
WARRANTY EXCLUSIONS
This Limited Warranty does not apply:
1. if the control system is not properly installed by a qualified technician in accordance with manufacturer’s installation instructions,
applicable codes, ordinances and good trade practices,
2. to damage or malfunctions resulting from failure to properly install, operate or maintain the system in accordance with the
manufacturer’s instructions;
3. if the rating plate’(s) or serial number(s) are altered, defaced or removed;
4. if the System is modified in any way or used with any non-factory authorized accessories or components;
5. to damage or failure from abuse, accident, act of nature, fire, flood, freezing or the like;
6. to accessories, rubber or plastic parts, light bulbs or glass parts;
7. if the System is moved from its original installation site; or if the original owner no longer owns the site or the System.
LABOR AND SHIPPING COSTS
This Limited Warranty does not cover labor costs for service, removal or reinstallation of any part nor shipping charges to or from
RAYPAK’S designated repair center or to or from the installation site. All such costs are your responsibility.
HOW TO MAKE A WARRANTY CLAIM
To make a warranty claim, promptly ship (postage prepaid) or carry the defective part to a designated RAYPAK Service Dealer or
Service Station in the United States, supplying proof of purchase and date of purchase and date of installation and the model and serial
numbers. If you cannot locate a dealer, contact RAYPAK’S Service Department at the address/telephone listed below. Raypak reserves
the right at all times to inspect the claimed defect and verify warranty coverage at its factory.
EXCLUSIVE WARRANTY - LIMIT ATION OF LIABILITY
This is the only warranty given by RAYPAK. No one is authorized to make any other warranties on Raypak’s behalf. ANY IMPLIED
WARRANTIES, INCLUDING MERCHANT ABILITY OR FITNESS FOR A PAR TICULAR PURPOSE, SHALL NOT EXTEND BEYOND THE APPLICABLE WARRANTY PERIOD SPECIFIED ABOVE. RAYP AK’S SOLE LIABILITY WITH RESPECT TO ANY DEFECT SHALL BE AS SET FOR TH
IN THIS LIMITED WARRANTY. ANY CLAIMS FOR INCIDENT AL OR CONSEQUENTIAL DAMAGES (INCLUDING DAMAGE FROM WA TER
LEAKAGE) ARE EXCLUDED. Some states do not allow limitations on how long an implied warranty lasts, or for the exclusion of incidental
or consequential damages, so the above limitation or exclusion may not apply to you.
THIS LIMITED WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, AND YOU MA Y ALSO HA VE OTHER RIGHTS WHICH V AR Y FROM
STA TE TO ST ATE.
We suggest you immediately complete the information below and retain this Limited Warranty Certificate in case warranty service is
needed.
The following information must be provided when you write or call:
Original OwnerDaytime T elephone Number
Complete Mailing Address
CityState Zip Code Installation Site
Model NumberContractor/Installater
Date of InstallationSerial Number
Raypak, Inc., 2151 Eastman Avenue, Oxnard, CA 93030 (805) 278-5300 FAX (805) 278-5489 Litho in U.S.A.
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APPENDIX A
Modbus Register Map
19
A-1
Page 20
Raypak Modbus Register Assignments
Function FunctionFunction
Type 2 43,6Description
R/ W3000140001SetpointDay Setpoint (Desired water temp @70F)
R/ W3000240002Nitesetback Night Setback (Desired water temp @ 70F)
R/ W3000340003Ratio Out1-200 = 0.1 - 20.0 in 0.1 increments
R/W3000440004ThrottlingDelta T of all boilers in system (Normally 20 / # boilers)
R/ W3000540005Modulating Step (%) min 5% steps
R/ W3000640006Wait State Time (Sec)
R/ W3000740007Outdoor Cut off Temperature (O/C)
R/ W3000840008Control Band (degrees F Tolerance from TAR) (C/B)
R/ W3000940009Lead Boiler Number (1 to Number of Boilers)
R/ W3001040010Number of Boilers
R/ W3001140011TP - Boiler Pump Delay (Min) Boiler #1
R/ W3001240012TP - Boiler Pump Delay (Min) Boiler #2
R/ W3001340013TP- Boiler Pump Delay (Min) Boiler #3
R/ W3001440014TP- Boiler Pump Delay (Min) Boiler #4
R/ W3001540015TP- Boiler Pump Delay (Min) Boiler #5
R/ W3001640016TP- Boiler Pump Delay (Min) Boiler #6
R/ W3001740017TP- Boiler Pump Delay (Min) Boiler #7
R/ W3001840018TP- Boiler Pump Delay (Min) Boiler #8
R/ W3001940019TS - Ignition Time (Sec) Boiler #1
R/ W3002040020TS - Ignition Time (Sec) Boiler #2
R/ W3002140021TS - Ignition Time (Sec) Boiler #3
R/ W3002240022TS - Ignition Time (Sec) Boiler #4
R/ W3002340023TS - Ignition Time (Sec) Boiler #5
R/ W3002440024TS - Ignition Time (Sec) Boiler #6
R/ W3002540025TS - Ignition Time (Sec) Boiler #7
R/ W3002640026TS - Ignition Time (Sec) Boiler #8
R/ W3002740027Time - Hrs
R/ W3002840028Time - Min
R/ W3002940029Time - DWK
R/ W3003040030Lead Change Hours
R100013003140031Bit 0 = Night Setback onNight Setback
R100173003240032Bit 0 = Fault Status )1=system fault)Controller LED Status
R10018Bit 1 = Call Out Request (1 = Yes)Controller LED Status
R3003340033Outdoor Temperature + 35
R3003440034Water Temperature + 35
R3003540035Target Temperature (TAR)
R3003640036Valve Position (0-100%) - Boiler #1
R3003740037Valve Position (0-100%) - Boiler #2
R3003840038Valve Position (0-100%) - Boiler #3
R3003940039Valve Position (0-100%) - Boiler #4
R3004040040Valve Position (0-100%) - Boiler #5
R3004140041Valve Position (0-100%) - Boiler #6
R3004240042Valve Position (0-100%) - Boiler #7
R3004340043Valve Position (0-100%) - Boiler #8
R3005240052SetpointDay Setpoint (Desired water temp @70F)
R3005340053Nitesetback Night Setback (Desired water temp @ 70F)
R3005440054Ratio Out1-200 = 0.1 - 20.0 in 0.1 increments
R3005540055ThrottlingDelta T of all boilers in system (Normally 20 / # boilers)
R3005640056Modulating Step (%) min 5% steps
R3005740057Wait State Time (Sec)
R3005840058Outdoor Cut off Temperature (O/C)
R3005940059Control Band (degrees F Tolerance from TAR) (C/B)
R3006040060Lead Boiler Number (1 to Number of Boilers)
R3006140061Number of Boilers
R3006240062TP - Boiler Pump Delays (Min) Boiler #1
R3006340063TP - Boiler Pump Delays (Min) Boiler #2
R3006440064TP - Boiler Pump Delays (Min) Boiler #3
R3006540065TP - Boiler Pump Delays (Min) Boiler #4
R3006640066TP - Boiler Pump Delays (Min) Boiler #5
R3006740067TP - Boiler Pump Delays (Min) Boiler #6
R3006840068TP - Boiler Pump Delays (Min) Boiler #7
R3006940069TP - Boiler Pump Delays (Min) Boiler #8
A-4
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R3007040070TS - Boiler Start Times (Sec) Boiler #1
R3007140071TS - Boiler Start Times (Sec) Boiler #2
R3007240072TS - Boiler Start Times (Sec) Boiler #3
R3007340073TS - Boiler Start Times (Sec) Boiler #4
R3007440074TS - Boiler Start Times (Sec) Boiler #5
R3007540075TS - Boiler Start Times (Sec) Boiler #6
R3007640076TS - Boiler Start Times (Sec) Boiler #7
R3007740077TS - Boiler Start Times (Sec) Boiler #8
R3007840078Time - Hrs
R3007940079Time - Min
R3008040080Time - DWK
R3008140081Lead Change
R3008240082Hrs Remaining
R108333008340083Bit 0 = Setback on (1)
R3008440084Boiler Valve Up Times (Sec)#12 words per
R3008640086Boiler Valve Up Times (Sec)#22 words per
R3008840088Boiler Valve Up Times (Sec)#32 words per
R3009040090Boiler Valve Up Times (Sec)#42 words per
R3009240092Boiler Valve Up Times (Sec)#52 words per
R3009440094Boiler Valve Up Times (Sec)#62 words per
R3009640096Boiler Valve Up Times (Sec)#72 words per
R3009840098Boiler Valve Up Times (Sec)#82 words per
R3010040100Boiler Valve Down Times (Sec)#12 words per
R3010240102Boiler Valve Down Times (Sec)#22 words per
R3010440104Boiler Valve Down Times (Sec)#32 words per
R3010640106Boiler Valve Down Times (Sec)#42 words per
R3010840108Boiler Valve Down Times (Sec)#52 words per
R3011040110Boiler Valve Down Times (Sec)#62 words per
R3011240112Boiler Valve Down Times (Sec)#72 words per
R3011440114Boiler Valve Down Times (Sec)#82 words per
R3011640116Spare
R3011740117Spare
R3011840119Spare
R3011940119Spare
R3012040120Spare
R3012140121Spare
R3012240122Spare
R3012340123O/Cdb (Off T>=C, OnT<=OC - O/Cdb)
R3012440124KPN : Proportional. Constant Numerator (0-255)
R3012540125KPD : Proportional. Constant Denominator (0-255)
R3012640126KDN : Differential. Constant Numerator (0-255)
R3012740127KDD : Differential Constant Denominator (0-255)
R3012840128Maximum Water Temp
R3012840129Maximum Water Temp Fault(0 = OK, 1 = Stpt > Max Temp,