heat-timer MODBUS RTU RS485 Installation And Operation Manual page 15

SrC reg /
DeSCrIPTIOn
VarIaBle#
102 System Sensor Trim
103 Valve Position
104 Valve Close Overdrive
105 Valve Close Trim
106 Valve Mode
107 Valve Open Trim
108 Valve Trim
109 District Steam Delay
110 System Setpoint
SrC 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 'District Steam Delay' when 'Operating Mode' is set to District Steam . Use 'System Setpoint', 'System
Differential' and 'Thermal Lockout Enable' when 'Operation Mode' is set to Burner/valve .
note: Use 'Vari-Boost Adjustment' when 'Boost Mode' is set to Vari-Day or Vari+ESD . Use 'Manual Boost Time' when
'Vari-Boost Adjustment' is set to Manual Boost .
note: The SRC 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 SRC Platinum Installation and Operation manual for supplementary information .
MODBUS Installation and Operation Manual
♦1
MUlT
UOM
(if not 1)
°C, °F
%
Seconds
%
%
%
Minutes
°C, °F
range / STaTeS / SPeCIal
ValUeS
-3 – +3°C, -5 – +5°F
0 – 100
0 – 90
0 – 5
0=Positioning
Sensor,1=Time-Based
0 – 5
0 – 20
0 – 30
21 – 122°C, 70 – 250°F
reaD
Only
X
15