Tekmar Snow Melting Control 680 Integration Manual page 7

Modbus Parameters
Read = R
33 Melting Hours (low word)
34 Melting Hours (high word)
35 Heat Cycles (low word)
36 Heat Cycles (high word)
37 System Pump Run Time (low word)
38 System Pump Run Time (high word)
39 Primary Pump Run Time (low word)
40 Primary Pump Run Time (high word)
41 Boiler Pump Run Time (low word)
42 Boiler Pump Run Time (high word)
Holding Registers (Starts at 30,000)
1 Outdoor Sensor Enable
2 BAS Outdoor Temperature
3 Melt Setpoint
4 Idle Enable
5 Idle Setpoint
6 Storm Enable
7 Storm Setpoint
8 Manual Melt Time
9 Add Melt Time
10 Storm Run Time
11 Snow/Ice Sensitivity 1
12 Snow/Ice Sensitivity 2
13 Warm Weather Shut Down Enable
14 Warm Weather Shut Down Temperature
15 Cold Weather Cut Out Enable
16 Cold Weather Cut Out
17 Melt/Stop Request
18 Storm/Stop Request
A Watts Water Technologies Company
Read/Write = R/W
R
R
R
R
R
R
R
R
R
R
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
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Hours Input U16
Hours Input U16
Enum Input U16
Enum Input U16
Hours Input U16
Hours Input U16
Hours Input U16
Hours Input U16
Hours Input U16
Hours Input U16
Enum Holding U16
°F Holding S16
°F Holding U16
Enum Holding U16
°F Holding U16
Enum Holding U16
°F Holding U16
Hours Holding U16
Hours Holding U16
Hours Holding U16
Enum Holding U16
Enum Holding U16
Enum Holding U16
°F Holding S16
Enum Holding U16
°F Holding S16
Enum Holding U16
Enum Holding U16
0 to 65535
0 to 65535
0 to 65535
0 to 65535
0 to 65535
0 to 65535
0 to 65535
0 to 65535
0 to 65535
0 to 65535
0 = Control to measure
outdoor air temperature,
1 = BAS to send outdoor air
temperature
-67 to 149°F
32 to 95 °F
0 = Idling disabled,
1 = Idling enabled
20 to 95 °F
0 = Storm disabled,
1 = Storm enabled
20 to 95 °F
30 to 1440 minutes
0 to 360 minutes
30 to 1440 minutes
0 = Auto, 1 = Min, 2 = -2,
3 = -1, 4 = Mid, 5 = +1,
6 = +2, 7 = Max
0 = Auto, 1 = Min, 2 = -2,
3 = -1, 4 = Mid, 5 = +1,
6 = +2, 7 = Max
0 = WWSD disabled
1 = Manual WWSD setting
32 to 95°F
0 = CWCO disabled
1 = Manual CWCO setting
-30 to 50°F
0 = Off, 1 = Melt
0 = Off, 1 = Storm
© 2015 680_B - 10/15