MODBUS Installation and Operation Manual
5
HT# 059266-00A
HWr 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:
The HWR 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 HWR Platinum Installation and Operation manual for supplementary information .
