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IntelliStation BAS Integration Manual
Modbus
®
Parameters
Modbus
®
Troubleshooting
Read= R Read/Write= R/W
If there is no communication, check the following:
• Check that the polarity on the Modbus
®
+ and – terminals is correct.
• Check that the Modbus
®
GND terminal is securely connected.
• Check that the Baud Rate on both devices are the same.
If the communication is intermittent, check the following:
• Check that the communication cable is of twisted pair type.
• Reliable communication depends on the cable length & Baud Rate used. Long cable length may require a
lower Baud Rate.
System Status Register
System Parameter Register
Product Information
Register Parameter Name Read/Write Units Type Format Range
1 DHW Target Max R °F Input U16 50 to 180°F
2 DHW Temp R °F Input U16 50 to 220°F
3 DHW Recirc Temp R °F Input U16 50 to 220°F
4 Hot Temp R °F Input U16 50 to 220°F
5 Cold Temp R °F Input U16 50 to 220°F
6 DHW Pressure R psi x 10 Input U16 0 to 170 psi
7 DHW Recirc Pressure R psi x 10 Input U16 0 to 170 psi
8 Hot Pressure R psi x 10 Input U16 0 to 170 psi
9 Cold Pressure R psi x 10 Input U16 0 to 170 psi
10 Valve Position R % Input U16 0 to 100%
11 Pump Status R on/off Input U16 0 = off, 1 = on
12 DHW Flow R gpm Input U16 0 to 160
13 DHW Recirc Flow R gpm Input U16 0 to 40
14 Energy Used R therms Input U16 0 to 65535
15 Error Code R Enum Input U16 See Error Code list
Register Parameter Name Read/Write Units Type Format Range
1 DHW Target R/W °F Holding U16 50°F to Target Max
Register Parameter Name Read/Write Units Type Format Range
1 Model R Num Input U16 Product model - “1069”
2 Firmware Revision R Num Input U16 SVN revision
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