MODBUS Installation and Operation Manual
7
HT# 059266-00A
HWrQ reg /
VarIaBle#
DeSCrIPTIOn
MUlT
(if not 1)
UOM
range / STaTeS / SPeCIal
ValUeS
reaD
Only
172
Lead Stage Rotation Mode
0=Time, 1=Manual, 2=FOFO
(No FOFO for 'Logic Mode'=OSS)
173
Periodic Rotation Interval
Hours
1 - 999
174 through 229 Day/Night Schedules
Minutes
since 0:00
0 – 1439, 1440=not set
230
Season
0=Winter, 1=Summer
231
Sequence
0=Lo/Hi/Lo/Hi, 1=Lo/Lo/Hi/Hi
232
Night Setback Temp
°C, °F
-44 - 0°C, -80 – 0°F
233
Set point
°C, °F
21 - 116°C, 70 - 240°F,
234
Day Night Shift
0=To-Day, 1= To-Night,
3=To-Schedule, 2=Extend-Day,
235
Standby Delay
Minutes
1 - 60
236
System Sensor
°C, °F
-40 – 121°C, -40 - +250°F
(32000=Open, 32001=Shorted)
X
237
System Sensor Trim
°C, °F
-3 - +3°C, -5 - +5°F
238
Calculated Target
°C, °F
0 - 116°C, 0 – 240°F (32003 - Off)
X
239
'Throttle Range' Range
°C, °F
1 – 11°C , 2 - 20°F
240
Max Target Temp
°C, °F
32 – 116°C, 90 – 240°F
HWrQ Platinum Boiler Type Table
Boiler Type LEAD – Special value (Up to Total Boilers – 1)
0
0 – 31
►
‘A’, ‘B’, ‘C’, …, ‘X’, ‘Y’, ‘Z’, ‘a’, ‘b’, ‘c’, ‘d’, ‘e’, ‘f’
1
0 – 15
►
‘AB’, ‘CD’, ‘EF’, …, ‘WX’, ‘YZ’, ‘ab’, ‘cd’, ‘ef’
2
0 – 9
►
‘ABC’, ‘DEF’, ‘GHI’, …, ‘STU’, ‘VWX’, ‘abc’, ‘def’
3
0 – 7
►
‘ABCD’, ‘EFGH’, ‘IJKL’, ‘MNOP’, ‘QRST’, ‘UVWX’, ‘abcd’, ‘efgh’
HWrQ Platinum notes
♦1
If specified, divide a read value by this to obtain the actual value – Multiply desired value by this before writing .
♦2
For variables that specify them, if a read value is a special value (32000 - 32005), do not divide by ‘MULT' .
♦3
Strings are packed 2 characters per register, most significant byte first .
♦4
Multi-register values are stored
big endian
(first register x 65536 + second register = value) .
note:
All variables are stored as ‘Holding Registers’ . MODBUS functions :
• ‘Read Holding Registers’ (function code 3),
• ‘Write Single Register' (function code 6),
• and ‘Write Multiple Registers’ (function code 16) are supported .
note:
All variables with multiple UOM’s depend upon the value of ‘Input Mode’ to determine which to use .
note:
Use 'Burner Differential' and 'Burner' when 'Output Mode' is set to Burner .
Use 'Valve' when 'Output Mode' is set to Motorized Valve .
note:
Use 'Boost' when 'Boost Mode' is set to Vari Boost or Vari Boost + ESD .
note:
'Boiler Status' range changes with 'Boiler Type' . For example: when 'Boiler Type' is set to 0, 'Boiler Status' range
is 0 to 1; when 'Boiler Type' is set to 1, 'Boiler Status' range is 0 to 2
note:
Use 'Last Stage Hold', 'Min Runtime', 'Offset', 'Purge', 'Reset Ratio', 'Reaction Time', 'Standby Delay' when 'Logic
Mode' is set to 0 .
note:
Use 'Reaction Time' when 'Lead Stage Rotation Mode' is set to 0 .
note:
Use 'Throttle Range' when 'Logic Mode' is set to 1 .
note:
Use 'Max Target' when 'Control Mode' is set to 0 .
note:
The HWRQ Platinum has a schedule, which is 7-days, 4 day/night pairs per day . For example: Register
38 is the first DAY schedule of Monday; Register 39 is the first NIGHT schedule of Monday; Register 46
is the first DAY schedule of Tuesday; Register 47 is the first NIGHT schedule of Tuesday and so on .
note:
Use HWRQ Platinum Installation and Operation manual for supplementary information .
