EnviraCOM serial protocol
W8735A1013 EnviraCOM™ Serial Adapter
INSTALLATION INSTRUCTIONS
TABLE OF CONTENTS
INSTALLATION...................................................................... 2
When installing this product…............................................ 2
Selecting Location.............................................................. 2
Mounting W8735A1013 EnviraCOM™Serial Adapter........ 2
Wiring................................................................................. 2
LED Description................................................................. 4
Glossary of Terms............................................................... 4
EnviraCOM™ Bus.............................................................. 4
Message Format................................................................ 4
Message Checksum........................................................... 5
SELECTED MESSAGE CLASSES....................................... 6
Node Identification 1 (10E0)............................................... 6
Node Identification 2 (10E1)............................................... 6
Device Status (3E70)......................................................... 7
DHW Cylinder Temperature (1260).................................... 7
DHW Cylinder Setpoint (10A0)........................................... 7
DHW Setpoint Range (10A1)............................................. 8
DHW Demand (30D0)........................................................ 8
Boiler Temperature (3200).................................................. 8
Desired Boiler Setpoint (22D9)........................................... 9
Central Heat Setpoint (22DB)............................................. 9
Supply High Limit (1081).................................................... 9
Heat/Cool Demand (3110)................................................ 10
Boiler Heat/Cool Demand (3114)...................................... 10
Displayed Temperature (12C0)..........................................11
Outdoor Temperature (1290).............................................11
Outdoor Humidity (1280)...................................................11
Alarm (3120)..................................................................... 12
APPLICATION
The W8735A1013 EnviraCOM™ Serial Adapter provides a host computer, gateway, or controller, with an RS-232 port, local
access to an EnviraCOM™ HVAC System. The host provides the application to control the W8735A1013. The W8735A1013
EnviraCOM™ Serial Adapter is powered through the EnviraCOM™ connection and is optically isolated for universal compatibility. The W8735A1013 uses the EnviraCOM™
Table 1. W8735A1013 Description
Model
W8735A1013
Application
Terminals
Local control of Envira1, 2, 3 – EnviraCOM™
COM™ HVAC system using DB9 – RS-232
host computer, gateway or
controller with RS- 232 serial
port. Host provides application.
Comment
W8735A1013 used with host.
Host provides application software and
user interface. As an application software
any terminal tool like Microsoft® HyperTerminal can be used during initial evaluation.
W8735A1013 provides means to move
data from EnviraCOM™ Bus to RS-232
port.
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W8735A1013 ENVIRACOM™ SERIAL ADAPTER
INSTALLATION
Wiring
CAUTION
When installing this product…
Electrical Hazard.
Equipment Mounting Damage Hazard.
Mounting W8735A1013 inside HVAC can
damage equipment.
Mount W8735A1013 outside HVAC equipment.
1. Read these instructions carefully. Failure to follow
these instructions can damage the product or cause a
hazardous condition
2. Check the ratings given in the instructions and on the
product to make sure the product is suitable for your
application.
3. Installer must be a trained, experienced service technician.
4. After completing installation, use these instructions to
check out the product operation.
1. Refer to Fig. 1 for wiring diagram.
2. Loosen terminal screws on W8735A1013 and connect
system wires. See Fig. 2.
3. Securely tighten each terminal screw.
4. Connect serial cable to W8735A1013 DB9 RS-232 connector to the host RS-232 connector (see host installation instructions for details), using a serial cable (not
provided with W8735A1013).
CAUTION
Electrical Hazard.
Can cause electrical shock or equipment
damage.
Disconnect power before beginning installation.
NOTE: Maximum distance between W8735A1013 DB9 RS232 connector and the host RS-232 connector is 25
feet.
5. Restore power to HVAC systems and host.
Selecting Location
DB9 CONNECTOR
Locate the W8735A1013 near the host or near the HVAC system, as determined most suitable for the application.
RS 232
Mounting W8735A1013
EnviraCOM™Serial Adapter
CAUTION
Electrical Hazard.
Equipment Mounting Damage Hazard.
Mounting W8735A1013 inside HVAC can
damage equipment.
Mount W8735A1013 outside HVAC equipment.
ENVIRACOMTM
COMMUNICATION
LED
Mounting the W8735A1013 is optional. When mounting is
desired, use the sheet of two-sided adhesive tape (provided).
1 2 3
1. Ensure the device is clean and dry and free of any oil
or dirt.
2. Peel the protective lining from one side of the tape and
press it to the back of the W8735A1013.
3. Remove the protective lining from the second surface
of the tape and press the W8735A1013 to the mounting
surface at the desired mounting location.
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ENVIRACOMTM
NETWORK TERMINALS
Fig. 1. Wiring W8735A1013
2
M20546
W8735A1013 ENVIRACOM™ SERIAL ADAPTER
FLAME
SENSE
SPARK
IGNITER
CIRCULATOR
L1
L2
W8735A1013
TO BAS
GND
RS 232
GND
INDUCER
24 VAC
TRANSFORMER
DAMPER
1 2 3
ENVIRACOM
DIAGNOSTIC
3
2
1
MV
PRESSURE SWITCH
LIMIT SWITCH
PV
GAS
CONTROL
PV/
MV
SENSOR 1
SENSOR 2
M32685
Fig. 2. Connecting the W8735A1013 to an S936X EnviraCOM™ enabled Integrated Water Heater Control
Table 2. Terminal Designations
W8735A1013 Terminal Designations
Function
1
To EnviraCOM™ network terminal 1 (data).
2
To EnviraCOM™ network terminal 2 (24 Vac).
3
To EnviraCOM™ network terminal 3 (24 Vac).
Serial
Connect W8735A1013 DB9 connector to host RS-232 serial
port using serial cable (not provided with W8735A1013).
3
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W8735A1013 ENVIRACOM™ SERIAL ADAPTER
Host Port Configuration
Host – Supports the application software. Devices such as a
computer, gateway, controller are examples of a host.
The configuration of the host:
HVAC – Heating, Ventilation and Air Conditioning.
Baud rate: 19200 bps.
Parity: none.
Data bits: 8.
Stop bits: 1.
Flow control: none.
EnviraCOM™ Bus
Communication over the EnviraCOM™ bus is managed by
transmitting messages, one by one. There are three roles
of EnviraCOM™ messages: Query, Report and Change
Request.
LED Description
The green Light Emitting Diode (LED) on the front of
W8735A1013 is used to show EnviraCOM™ Bus activity as
follows:
LED blinks rapidly
• Devices respond to query messages by sending Report
messages of the same message class.
Device is currently
transmitting information on
communications bus.
LED blinks once
Device received and
acknowledged a message.
LED on constantly
Device failure. Replace
device.
LED off constantly
Wiring problem if device is
not functioning correctly and
there is no LED activity at
least once a minute. Check
wiring to communications
bus terminals 1, 2 and 3.
LED blinks continuously
• Query messages are used to retrieve information from
devices.
• A Change Request message is used to request a change
in settings of a device. Devices respond to Change
Request messages with Report messages of the same
message class to confirm the final settings.
Message Format
Messages sent or received from the W8735A1013 EnviraCOM™ Serial Adapter are coded in ASCII format (case
sensitive) as follows with individual parts delimited by space
characters (20 hex). All numbers are in hexadecimal format.
The default message priority is medium.
NOTE: Message Class along with Message Instance Number defines type of message.
MESSAGE PRIORITY
H = HIGH
M = MEDIUM
MESSAGE INSTANCE NUMBER
L = LOW
DATA LENGTH (IN BYTES)
CHECKSUM
M 0418 00 Q 02 FF FF 5E
It is normal for LED to blink
continuously during startup
and discovery.
Wiring problem if device is
not functioning correctly and
there is a continuous series
of LED blinks. Check wiring
to communications bus
terminals 1, 2 and 3.
DATA
MESSAGE SERVICE
MESSAGE Q = QUERY
R = REPORT
CLASS
C = CHANGE REQUEST
Fig. 3. Message format guide.
In addition to EnviraCOM™ messages, the W8735A1013
sends status messages to the host application.
Glossary of Terms
RS-232 – Long-established standard that describes the
physical interface and protocol for relatively low-speed serial
data communication between computers and related devices.
Originally defined by industry trade group, the Electronic
Industries Association (EIA), for teletype devices.
Serial – Only one event occurring at a time, contrasted with
parallel, which means more than one event happening at a
time.
DB9 – Standard 9-pin connector. DB9 used on W8735A1013
is a female configuration.
EnviraCOM™ – Three-wire communications protocol used in
HVAC products.
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W8735A1013 ENVIRACOM™ SERIAL ADAPTER
Message Checksum
Table 3. Status Messages.
Message
[Reset - Vxx.xx]
Sent during power-up where
Vxx.xx denotes the version
of adapter firmware, e.g.
V01.11.
[Idle]
Sent when EnviraCOM™
bus idle state is detected.
[Ack]
Sent when received
message contained a
valid checksum and
message has been
queued for transmission to
EnviraCOM™ bus.
[Nak]
[Sent]
Checksum is used as indicator of failure free communication
between host application and W8735A1013 EnviraCOM™
Serial Adapter. Host application should check the checksum
of received messages and only process messages with a correct checksum. W8735A1013 EnviraCOM™ Serial Adapter
checks the checksum of messages received from the host
application and sends the received messages to EnviraCOM™ bus only if no corruption is detected.
Description
Checksum can be computed using Exclusive OR operation ⊕
over all bytes of a message.
Example:
Received message:
Sent when received
message contained an
invalid checksum.
M 10E0 01 R 08 00 00 CE 45 D0 41 08 40 AB
Message priority and service is converted to hexadecimal
number based on Table 4 and 5.
Sent when queued message
has been successfully
transmitted to EnviraCOM™
bus.
Table 4. Message Priority.
Priority
NOTE: The host application will not send any new message before the previous one is transmitted to the
EnviraCOM™ bus (i.e. prior receiving [Sent] status
message).
Each message sent to W8735A1013 EnviraCOM™ Serial
Adapter is terminated with Carriage Return character (0D
hex) and optionally followed by Line Feed character (0A hex).
Each message received from W8735A1013 EnviraCOM™
Serial Adapter is terminated with following sequence of characters:
Value
L – Low
0(hex)
M – Medium
40(hex)
H – High
80(hex)
Table 5. Service Priority.
Service
Carriage Return (0D hex) + Line Feed (0A hex) + “>” (3E hex)
Value
Q – Report Query
0(hex)
R – Report
40(hex)
C – Change Request
80(hex)
Checksum is computed as:
40 ⊕ 10 ⊕ E0 ⊕ 01 ⊕ 40 ⊕ 08 ⊕ 00 ⊕ 00 ⊕ CE ⊕ 45 ⊕ D0 ⊕ 41 ⊕ 08 ⊕ 40 = AB
5
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W8735A1013 ENVIRACOM™ SERIAL ADAPTER
SELECTED MESSAGE CLASSES
The following sections describe usage of most common message classes. Note that devices do not need to support all of the
messages and sending of such messages will neither have an effect nor response will be received.
WARNING
Usage beyond provided examples is not supported by Honeywell.
NOTE: Messages can be shorter than those shown in the following examples (truncated from the right). The callouts show
samples of what bytes of information may be available to a device. Not all devices can transmitt all information.
Node Identification 1 (10E0)
Message is used to identify devices connected to EnviraCOM™ bus.
Whenever any device sends a Query message to EnviraCOM™ bus, Report message from each connected device is transmitted over the EnviraCOM™ bus. Report message contains encoded OS Number.
There are two formats of OS Number. Fig. 4 shows both formats as a response of two devices to Query message.
OS NUMBER (NEW FORMAT): 1 CHARACTER = 1 BYTE
DECODED OS NUMBER: S9360B1015C
M 10E0 00 Q 00 B0
M 10E0 00 R 13 00 00 00 00 00 00 00 00 53 39 33 36 30 42 31 30 31 35 43 B8
11TH CHARACTER: 43(HEX) = ‘C’
10TH CHARACTER: 35(HEX) = ‘5’
1ST CHARACTER: 53(HEX) = ‘S’
M 10E0 01 R 08 00 00 CE 45 D0 41 08 40 AB
OS NUMBER (LEGACY FORMAT): 1 CHARACTER = 6 BITS + 32
DECODED OS NUMBER: SD7000A
1ST CHARACTER = 1ST 6 BITS: 51 + 32 = 83 = ‘S’
2ND CHARACTER = 2ND 6 BITS: 36 + 32 = 68 = ‘D’
7TH CHARACTER = 7TH 6 BITS: 9 + 32 = 41 = ‘A’
8TH CHARACTER = 8TH 6 BITS: 0 + 32 = 32 = SPACE
Fig. 4. Node Identification 1 (10E0).
Optionally, devices can send Node Identification 2 and 3 reports right after their Node Identification 1 report, containing
additional identification information.
Node Identification 2 (10E1)
Fig. 5 shows an example of report following Node Identification 1 report.
M 10E1 00 R 09 33 41 01 28 00 00 6B 89 3A 7B
FUNCTIONAL UNIT ID: ID OF THE FUNCTIONAL UNIT THAT BEST DESCRIBES THE DEVICE
33(HEX) = 51 = DOMESTIC HOT WATER (DHW) CONTROLLER
3A(HEX) = 58 = BOILER TEMPERATURE CONTROLLER
MINOR SW REVISION NUMBER: 28(HEX) = 40
MAJOR SW REVISION NUMBER: 01(HEX) = 1
Fig. 5. Node Identification 2 (10E1).
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W8735A1013 ENVIRACOM™ SERIAL ADAPTER
Device Status (3E70)
Message is used to identify existence of control device in a system and its current state. Fig. 6 and 7 show responses to a
Device Status query.
M 3E70 00 Q 00 0E
INSTANCE: 00(HEX) = ALL DEVICES
00(HEX) – APPLIES TO ALL DEVICES THAT LISTEN TO THE MESSAGE CLASS
10(HEX) – FAN CONTROLLER
11(HEX) – GAS HEAT
42(HEX) – COMPRESSOR COOLING
F0(HEX) – WATER HEATER
M 3E70 F0 R 08 00 04 01 00 00 00 00 00 B3
FLAME CURRENT [nA]: 0000(HEX) = 0nA
CURRENT SEQUENCE STATE OF THE DEVICE: 01(HEX) = IDLE
00(HEX) = 0 = NOT USED – THIS VALUE SHOULD BE USED BY ALL EQUIPMENT EXCEPT GAS VALVES.
01(HEX) = 1 = IDLE – WAITING FOR A HEAT REQUEST
02(HEX) = 2 = WAIT PSW OPEN – WAITING FOR PRESSURE SWITCH TO OPEN
03(HEX) = 3 = WAIT PSW CLOSE – WAITING FOR PRESSURE SWITCH TO CLOSE
04(HEX) = 4 = PREPURGE – FLUSHING COMBUSTION CHAMBER
05(HEX) = 5 = HIS WARMUP – PREHEATING HOT SURFACE IGNITER
06(HEX) = 6 = IGN ACTV – IGNITION ACTIVATION - START FUEL FLOW
07(HEX) = 7 = PROVE FLAME – CHECKING FOR FLAME TO BE PRESENT WITHOUT IGNITION SOURCE
08(HEX) = 8 = RUNNING
09(HEX) = 9 = POSTPURGE – FLUSHING COMBUSTION PRODUCTS FROM COMBUSTION CHAMBER
0A(HEX) = 10 = INTERPURGE – SIMILAR TO POSTPURGE EXCEPT WILL RECYCLE BACK TO TRY ANOTHER IGNITION
0B(HEX) = 11 = PSW FAIL CLOSE – PRESSURE SWITCH HAS FAILED IN THE CLOSED CONDITION
0C(HEX) = 12 = PSW FAIL OPEN – PRESSURE SWITCH HAS FAILED IN THE OPEN CONDITION
0D(HEX) = 13 = SOFTLOCKOUT – FAILURE DETECTED BUT WILL RETRY AFTER A LOCKOUT PERIOD
0E(HEX) = 14 = HARDLOCKOUT – FAILURE DETECTED AND WILL NOT RETRY UNTIL A MANUAL RESET
0F(HEX) = 15 = LIMIT OPEN – LIMIT SWITCH IS IN AN OPEN CONDITION
10(HEX) = 16 = FLAME OUT OF SEQ – THE FLAME HAS BEEN DETECTED OUT OF SEQUENCE
11(HEX) = 17 = SELF TEST – THE DEVICE IS IN A SELF TEST MODE
12(HEX) = 18 = WAIT VENT OPEN – WAITING FOR VENT DAMPER TO OPEN (END SWITCH TO CLOSE)
13(HEX) = 19 = WAIT VENT CLOSE – WAITING FOR VENT DAMPER TO CLOSE (END SWITCH TO OPEN)
14(HEX) = 20 = VENT FAIL CLOSE – THE VENT DAMPER HAS FAILED IN THE CLOSED CONDITION (END SWITCH IS OPEN)
15(HEX) = 21 = VENT FAIL OPEN – THE VENT DAMPER HAS FAILED IN THE OPEN CONDITION (END SWITCH IS CLOSED)
CURRENT INSTANTANEOUS STATE OF THE DEVICE: 00(HEX) = OFF
00(HEX) = 0 = OFF
C8(HEX) = 200 = FULL ON
Fig. 6. Device Status (3E70).
M 3E70 F0 R 08 C8 04 08 00 00 00 1B 30 59
FLAME CURRENT [nA]: 1B30(HEX) = 6960nA
CURRENT SEQUENCE STATE OF THE DEVICE: 08(HEX) = RUNNING
CURRENT INSTANTANEOUS STATE OF THE DEVICE: C8(HEX) = FULL ON
Fig. 7. Device Status (3E70).
DHW Cylinder Temperature (1260)
Message is used to retrieve the water temperature.
Fig. 8 shows a response to a DHW Cylinder Temperature query.
M 1260 F0 Q 00 C2
INSTANCE: F0(HEX) = WATER HEATER
M 1260 F0 R 06 13 06 12 5C 15 B8 72
TEMPERATURE AT THE BOTTOM OF THE TANK [0.01°C]: 15B8(HEX) = 55.60°C (132.08°F)
TEMPERATURE AT THE TOP OF THE TANK [0.01°C]: 125C(HEX) = 47.00°C (116.60°F)
7FFF(HEX) = NOT AVAILABLE
TEMPERATURE [0.01°C]: 1306(HEX) = 48.70°C (119.66°F)
Fig. 8. DHW Cylinder Temperature (1260).
DHW Cylinder Setpoint (10A0)
M 10A0 F0 Q 00 00
M 10A0 F0 R 05 17 70 00 01 18 3B
DHW SETPOINT DIFFERENTIAL [0.01°C]: 0118(HEX) = 2.80°C (5.04°F)
DHW SETPOINT [0.01°C]: 1770(HEX) = 60.00°C (140.00°F)
Fig. 9. DHW Cylinder Setpoint (10A0).
Change of the temperature setpoint is shown in Fig. 10.
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W8735A1013 ENVIRACOM™ SERIAL ADAPTER
M 10A0 F0 C 02 19 64 FF
DHW SETPOINT [0.01°C]: 1964(HEX) = 65.00°C (149.00°F)
M 10A0 F0 R 05 19 64 00 01 18 21
Fig. 10. DHW Temperature Setpoint (10A0).
WARNING
Changing of the temperature setpoint may not work when other interacting devices are connected to
EnviraCOM™ bus. Can cause severe injury, death or property damage.
DHW Setpoint Range (10A1)
Message is used to retrieve or change the range of values allowed for temperature setpoint and setpoint differential.
Fig. 11 shows a response to a DHW Setpoint Range query.
M 10A1 F0 Q 00 01
M 10A1 F0 R 08 1A B8 05 00 05 6E 02 30 56
MINIMUM SETPOINT DIFFERENTIAL [0.01°C]: 0230(HEX) = 5.60°C (10.08°F)
7FFF(HEX) = NOT AVAILABLE
MAXIMUM SETPOINT DIFFERENTIAL [0.01°C]: 056E(HEX) = 13.90°C (25.02°F)
7FFF(HEX) = NOT AVAILABLE
MINIMUM SETPOINT [0.01°C]: 0500(HEX) = 12.80°C (55.04°F)
7FFF(HEX) = NOT AVAILABLE
MAXIMUM SETPOINT [0.01°C]: 1AB8(HEX) = 68.40°C (155.12°F)
7FFF(HEX) = NOT AVAILABLE
Fig. 11. DHW Setpoint Range (10A1).
DHW Demand (30D0)
Message is used to retrieve a demand for the domestic hot water equipment.
Fig. 12 shows responses to a DHW Demand query message.
M 30D0 F0 Q 00 50
DHW FORCED OFF.
M 30D0 F0 R 02 FC 10 FE
STATUS – SUM OF FOLLOWING ITEMS:
EQUIPMENT TYPE: 00(HEX) = ELECTRIC HEATING, 10(HEX) = GAS OR OIL HEATING
ON/OFF: 00(HEX) = OFF, 01(HEX) = ON
DEMAND: FC(HEX) = 252 = FORCE – CHECK ON/OFF FIELD
DHW DEMANDED TO RUN AT 100%.
M 30D0 F0 R 02 C8 11 CB
DEMAND: C8(HEX) = 200 = 100%
DHW DEMANDED TO RUN AT 0%.
M 30D0 F0 R 02 00 10 02
DEMAND: 00(HEX) = 0 = 0%
Fig. 12. DHW Demand (30D0)
Boiler Temperature (3200)
Message is used to retrieve the temperature of water supplied by the boiler.
Fig. 13 shows a response to a Boiler Temperature query.
M 3200 3D Q 00 4F
INSTANCE: 3D (HEX) = BOILER
M 3200 3D R 04 18 6A 16 44 2B
RETURN TEMPERATURE TO THE BOILER [0.01°C]:
1644(HEX) = 57.00°C (134.60°F)
7FFF(HEX) = NOT AVAILABLE
BOILER WATER TEMPERATURE [0.01°C]:
186A(HEX) = 62.50°C (144.50°F)
Fig. 13. Boiler Temperature (3200)
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W8735A1013 ENVIRACOM™ SERIAL ADAPTER
Desired Boiler Setpoint (22D9)
Message is used to retrieve a desired setpoint of the boiler.
Fig. 14 shows a response to a Desired Boiler Setpoint query.
M 22D9 3D Q 00 86
M 22D9 3D R 02 19 64 B9
DESIRED BOILER SETPOINT [0.01°C]:
1964(HEX) = 65.00°C (149.00°F)
Fig. 14. Desired Boiler Setpoint (22D9)
Central Heat Setpoint (22DB)
Message is used to retrieve or change the boiler setpoint for the central heating function of a boiler.
Fig. 15 shows a response to a Central Heat Setpoint query.
M 22DB 3D Q 00 84
M 22DB 3D R 04 13 1A 02 30 FB
SETPOINT DIFFERENTIAL [0.01°C]:
0230(HEX) = 5.60°C (10.08°F)
BOILER SETPOINT [0.01°C]:
131A(HEX) = 48.90°C (120.02°F)
Fig. 15. Central Heat Setpoint (22DB)
Fig. 16 shows a response to a Central Heat Setpoint change request.
M 22DB 3D C 02 19 64 7B
BOILER SETPOINT [0.01°C]:
1964(HEX) = 65.00°C (149.00°F)
M 22DB 3D R 04 19 64 02 30 8F
Fig. 16. Central Heat Setpoint (22DB)
WARNING
Changing of the boiler setpoint may not work when other interacting devices are connected to
EnviraCOM™ bus.
Supply High Limit (1081)
Message is used to retrieve the supply high limit temperature setpoint, differential and the state of the limit.
Fig. 17 shows a response to a Supply High Limit query.
M 1081 3D Q 00 EC
M 1081 3D R 05 20 1C 03 3E OO AB
STATUS: 00(HEX) = NO HIGH LIMIT CONDITION,
01(HEX) = HIGH LIMIT CONDITION IS ACTIVE
HIGH LIMIT DIFFERENTIAL [0.01°C]:
033E(HEX) = 8.30°C (14.94°F)
7FFF(HEX) = NOT AVAILABLE
SUPPLY HIGH LIMIT SETPOINT [0.01°C]:
201C(HEX) = 82.20°C (179.96°F)
7FFF(HEX) = NOT AVAILABLE
Fig. 17. Supply High Limit (1081)
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W8735A1013 ENVIRACOM™ SERIAL ADAPTER
Heat/Cool Demand (3110)
Message is used to retrieve a demand for the emergency heat, heating equipment.
Fig. 18 shows responses to a Heat/Cool Demand query.
M 3110 00 Q 00 61
EQUIPMENT (ONE STAGE) FORCED OFF:
M 3110 00 R 04 01 FC 10 10 D8
SYSTEM STAGE1 – SUM OF FOLLOWING ITEMS:
EQUIPMENT TYPE:
10(HEX) = NATURAL GAS OR OIL HEATING – IF MODE = 10(HEX) OR 30(HEX)
STAGE1 ON/OFF: 00(HEX) = OFF, 01(HEX) = ON
QUALIFICATION – SUM OF FOLLOWING ITEMS:
MODE:
10(HEX) = HEATING, 30(HEX) = EMERGENCY HEATING
ON/OFF:
00(HEX) = ALL OF THE STAGES ARE OFF, 01(HEX) = AT LEAST ONE STAGE IS ON
DEMAND:
FC(HEX) = 252 = FORCE – CHECK STAGE1 ON/OFF FIELD
EQUIPMENT (ONE STAGE) DEMANDED TO RUN AT 100%:
M 3110 00 R 04 01 C8 11 11 EC
DEMAND:
C8(HEX) = 200 = 100%
EQUIPMENT (ONE STAGE) DEMANDED TO RUN AT 0%:
M 3110 00 R 04 01 00 10 10 24
DEMAND:
00(HEX) = 0 = 0%
Fig. 18. Heat/Cool Demand (3110)
Boiler Heat/Cool Demand (3114)
Message is used to retrieve a demand for the boiler.
Fig. 19 shows responses to a Boiler Heat/Cool Demand query.
M 3114 3D Q 00 58
INSTANCE: 3D(HEX) = BOILER
BOILER (ONE STAGE) FORCED OFF:
M 3114 3D R 04 01 FC 10 10 E1
SYSTEM STAGE1 – SUM OF FOLLOWING ITEMS:
EQUIPMENT TYPE:
10(HEX) = NATURAL GAS OR OIL HEATING – IF MODE = 10(HEX) OR 30(HEX)
STAGE1 ON/OFF: 00(HEX) = OFF, 01(HEX) = ON
QUALIFICATION – SUM OF FOLLOWING ITEMS:
MODE:
10(HEX) = HEATING, 30(HEX) = EMERGENCY HEATING
ON/OFF:
00(HEX) = ALL OF THE STAGES ARE OFF,
01(HEX) = AT LEAST ONE STAGE IS ON
DEMAND:
FC(HEX) = 252 = FORCE – CHECK STAGE1 ON/OFF FIELD
BOILER (ONE STAGE) DEMANDED TO RUN AT 100%:
M 3114 3D R 04 01 C8 11 11 D5
DEMAND:
C8(HEX) = 200 = 100%
BOILER (ONE STAGE) DEMANDED TO RUN AT 0%:
M 3114 3D R 04 01 00 10 10 1D
DEMAND:
00(HEX) = 0 = 0%
Fig. 19. Boiler Heat/Cool Demand (3114)
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W8735A1013 ENVIRACOM™ SERIAL ADAPTER
Displayed Temperature (12C0)
Message is used to retrieve a displayed ambient temperature.
Fig. 20 shows responses to a Displayed Temperature query.
M 12C0 00 Q 00 92
TEMPERATURE DISPLAYED IN DEGREES FAHRENHEIT:
M 12C0 00 R 03 4D 00 FF 63
UNITS:
00(HEX) = °F, 01(HEX) = 0.5°C
DISPLAYED AMBIENT TEMPERATURE [°F]:
4D(HEX) = 77°F (25°C)
TEMPERATURE DISPLAYED IN DEGREES CELSIUS:
M 12C0 00 R 03 31 01 FF 1E
DISPLAYED AMBIENT TEMPERATURE [0.5°C]:
31(HEX) = 24.5°C (76.1°F)
Fig. 20. Displayed Temperature (12C0)
Outdoor Temperature (1290)
Message is used to retrieve an outdoor temperature.
Fig. 21 shows a response to an Outdoor Temperature query.
M 1290 00 Q 00 C2
M 1290 00 R 02 FB A0 DB
OUTDOOR TEMPERATURE [0.01°C]:
FBA0(HEX) = -11.20°C (11.84°F)
7FFF(HEX) = NOT AVAILABLE
Fig. 21. Outdoor Temperature (1290)
Outdoor Humidity (1280)
Message is used to retrieve an outdoor humidity.
Fig. 22 shows a response to an Outdoor Humidity query.
M 1280 00 Q 00 D2
M 1280 00 R 06 2C 0A 0A 7F FF 00 38
OUTDOOR DEW POINT TEMPERATURE [0.01°C]:
7FFF(HEX) = NOT AVAILABLE
OUTDOOR TEMPERATURE [0.01°C]:
0A0A(HEX) = 25.70 C (78.26 F)
OUTDOOR HUMIDITY IN PERCENT RELATIVE HUMIDITY [%RH]:
2C(HEX) = 44%RH
Fig. 22. Outdoor Humidity (1280)
11
69-2644—01
W8735A1013 EnviraCOM™ Serial Adapter
Alarm (3120)
Message is used to retrieve states of alarms.
Fig. 23 shows responses to an Alarm query.
M 3120 00 Q 00 51
NO ALARM REPORTED:
M 3120 00 R 04 70 00 00 00 65
ALARM TYPE:
0000(HEX) = NO ALARM – THE DEVICE HAS NO ALARMS
MATURED ALARM REPORTED:
M 3120 00 R 08 F8 00 38 F0 33 00 00 00 1A
INSTANCE: IDENTIFYING INSTANCE OF THE DEVICE
F0(HEX) = WATER HEATER
ALARM TYPE:
0000(HEX) = 0 = NO ALARM – THE DEVICE HAS NO ALARMS
0002(HEX) = 2 = LPS OPEN – PRESSURE SWITCH FAILED TO OPEN
0004(HEX) = 4 = FLAME CURRENT – FLAME CURRENT CAUTION LEVEL WHILE RUNNING
0006(HEX) = 6 = SLO FLAME SEQ – SOFT LOCKOUT – FLAME SENSED OUT OF NORMAL SEQUENCE
0017(HEX) = 23 = FLAME IN PREPURGE – FLAME SENSED DURING PREPURGE
0018(HEX) = 24 = FLAME IN POSTPURGE – FLAME SENSED DURING POSTPURGE
001A(HEX) = 26 = HIGH LIMIT – HIGH LIMIT SWITCH OPEN
001D(HEX) = 29 = LPS CLOSE – PRESSURE SWITCH FAILED TO CLOSE
001F(HEX) = 31 = DHW UPPER – THE DHW UPPER TEMPERATURE SENSOR IS OUT OF SPECIFICATION
0020(HEX) = 32 = DHW LOWER – THE DHW LOWER TEMPERATURE SENSOR IS OUT OF SPECIFICATION
0037(HEX) = 55 = DAMPER SW CLOSE – ATMOSPHERIC DAMPER END SWITCH FAILED TO CLOSE (STUCK OPEN)
0038(HEX) = 56 = DAMPER SW OPEN – ATMOSPHERIC DAMPER END SWITCH FAILED TO OPEN (STUCK CLOSED)
0039(HEX) = 57 = ROD SHORT – FLAME ROD SHORTED TO GROUND
003A(HEX) = 58 = ZERO CROSSING – AC LINE FREQUENCY ERROR – SIGNAL IS TOO NOISY OR FREQUENCY IS OUT OF RANGE
003B(HEX) = 59 = AC LINE – AC LINE VOLTAGE TOO HIGH OR TOO LOW
003C(HEX) = 60 = STAT PHASE – THERMOSTAT INPUT PHASE WRONG
003D(HEX) = 61 = POWER SUPPLY – POWER SUPPLY OUTPUT UNSTABLE
003E(HEX) = 62 = SLO RETRY – SOFT LOCKOUT – MAXIMUM NUMBER OF RETRIES EXCEEDED
003F(HEX) = 63 = SLO RECYCLE – SOFT LOCKOUT – MAXIMUM NUMBER OF RECYCLES EXCEEDED
0040(HEX) = 64 = SLO ELECTRONICS – SOFT LOCKOUT – ELECTRONICS FAILURE
0041(HEX) = 65 = WATER HIGH TEMP – OVER TEMPERATURE ERROR. SENSORS MEASURED TEMPERATURE IN EXCESS OF ECO LIMIT
FAULT STATE, 7TH BIT:
1 – ON, 0 – OFF
F8(HEX) AND 80(HEX) = 80(HEX) – ALARM IS ON
CLEARED ALARM REPORTED:
M 3120 00 R 08 78 00 37 F0 33 00 00 00 95
ALARM TYPE:
0037(HEX) = 55 = DAMPER SW CLOSE – DAMPER END SWITCH FAILED TO CLOSE (STUCK OPEN)
FAULT STATE, 7TH BIT:
78(HEX) AND 80(HEX) = 00(HEX) – ALARM IS OFF
Fig. 23. Alarm (3120)
Automation and Control Solutions
Honeywell International Inc.
1985 Douglas Drive North
Golden Valley, MN 55422
customer.honeywell.com
® U.S. Registered Trademark
© 2011 Honeywell International Inc.
69-2644—01 M.S. 06-11
Printed in U.S.A.
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