Greenheck DC Installation, Operation And Maintenance Manual page 22

Modbus Registers
The DC fan's VFD is configured for Modbus RTU communication as standard. The Modbus register list is for
applications where a building management system or field-supplied control are to be used for fan operation.
Register Name
1 Run Command
2 Speed Reference
3 Operational Status
4 Light Control
External
5
Temperature
6 Last Fault Code
7 Second Last Fault
8 Third Last Fault
9 Fourth Last Fault
10 Fifth Last Fault
11 Firmware Version
12 Operating Hours
13 Motor RPM
14 Voltage, DC Bus
Voltage, Output
15
RMS
Current, Motor
16
RMS
Temperature,
17
Motor
Temperature,
18
Transistor
Temperature,
19
MCU
Thermal Speed
20
Derate
Communication
21
Errors
22 -- Spare --
23 -- Spare --
24 -- Spare --
25 -- Spare --
KEEP ALIVE
26
(WatchDog)
MODBUS Serial
27
Speed
28 Motor Type
MODBUS Device
29
ID
30 -- Spare --
NOTE: Registers 1000-1150 are reserved for internal Diagnostics and Testing.
22 High Volume, Low Speed Ceiling Fans
R/W Retentive Signed Format
R/W x
R/W xxx
R x
R/W xxx
R xxxxx
R R xxx
R R xxx
R R xxx
R R xxx
R R xxx
R R xxxxx
R R xxxxx
R S xxx
R xxx
R xxx
R xx.x
R S xxx.x -300...1100
R S xxx.x -400...1250
R S xxx.x -300...1350
R xxx
R xxx
R
R
R
R
R/W R xxxxx
R/W x
R/W
R/W R
R/W
Range Default Description
0,1,2 0=Stop=clear Fault(s); 1=Reverse; 2=Forward; 99=Reset
1...100 Percentage of full speed/torque
1=Comm CRC errors, 2=Drive Faulted, 3=Motor temp
0...6 warning, 4=IGBT temp warning, 5=Drive Inhibited (Fire
Input), 6=Wind Shut Down active
J5 0-10V Output for Optional
0..100 0
Light Control (%)
-400..1100 External Temp (°C) (0.1 unit)
Integer code representing
fault history
1-500 Incremental Version Count
Operating hours (driving
0-65535
motor)
-300...300 Motor RPM (0.1 rpm)
0...1000 Bus Voltage (Volts) (1 units)
0...1000 RMS Modulated Output Voltage (Volts) (1 units)
RMS Motor current (Amps)
0...150
(0.1 units)
Motor Temp (°C) (0.1 units)
Transistor Temp (°C) (0.1
units)
MCU Temp (°C) (0.1 units)
Speed/Torque derate based
0...100
on overtemp (%)
Number of errors since last
0-65535
power cycle
0
0
0
0
0-65535 30 Seconds
Baud Rate Setting
0...9 5
(SW2: Pin 7 ON)
0..2 0 13,70,170
New Device ID is set after
1-247 2
power cycle
0
Detail
Resets to 0 after power
cycle
Based off an external
10K @ 25C NTC
thermistor
At each fault occurrence,
values are shifted to next
register and the current
fault is displayed in Last
Fault Code. Values are
retained after power
cycle.
MAX 65535
Transistor to Heatsink
Thermal regulation
(Motor and/or Drive)
0-65535
Any message resets; if a
timeout occurs, fan will
stop (if running)
0 1200 bps
1 2400 bps
2 4800 bps
3 9600 bps
4 19200 bps
5 38400 bps
6 57600 bps
7 115200 bps
0=13; 1 = 70; 2=170
SW2 PIN 8 must be set
(on) for this to take effect
®