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SYSTEM MONITORING
The current Tempering Mode is viewed at Discrete Input 16 “Tempering_Mode.Val.” It is also
an output used for VRF applications. The tempering mode will show heating when in heating or
ventilation only mode, and cooling for cooling mode.
12.9.5.2 Heating Control
The heating control type is located at Input Register 44 “HTG_ControlType_BN.” The setpoint
is Holding Register 38 “Occ_HTG_SetP.Val” if adjustable setpoint is chosen. Otherwise the
setpoint is based on an outdoor temperature schedule. The type is Input Register 48 “Heating_
SetPtType_BN,” where 1 = Adjust and 2 = OA Reset. The acting setpoint is Input Register 46
“HTG_SetP_Adjusted.”
The heating output statuses are the following:
u
Discrete Input 6 “Heating_Enable_1.Val” for stage one or modulating types where the
demand is greater than 0
u
Discrete Input 13 “Heating_Enable_2.Val” for stage two
u
Input Register 36 “Heating_Command.Val” shows a percentage for the 0–10V output.
It is also possible for the BMS to take over total control of the 10–0V hot water valve signal out
to the controlled valve and heating output directly for special cases. All setpoints, etc. will be
ignored in this case. To do this, set the heating setting “Valve Control” to BMS on the screen, or
through Binary Value 74 “BMS_HW_Valve_Control.”
Then control the valve through
u
Holding Register 44 “HeatingCommand_BMS” to set a value for the 0–10V output, where 0 is
0V and 100 is 10V.
u
Coil 7 “Heating_Enable_1.Val” can also be controlled directly if needed.
12.9.5.3 Cooling Control
The cooling control type is located at Input Register 45 “CLG_ControlType_BN.” The setpoint is
Holding Register 40 “Occ_CLG_SetP.Vall.”
The cooling output statuses are the following:
u
Discrete Input 7 “Cooling_Enable_1.Val” for stage one or modulating types where the demand
is greater than 0
u
Discrete Input 8 “Cooling_Enable_2.Val” for stage two
u
Input Register 34 “Cooling_Command.Val” shows a percentage for the 0–10V output.
