Overhead Ceiling Fans
51
®
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al
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e-Installation
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e System
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ation
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Netw
orking
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ation And
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Refer
ence
Modbus Registers List
HVLS fan VFDs are configured for Modbus RTU communication as standard. The Modbus register list is for
applications where a building management system (BMS) or field-supplied control are to be used for fan operation.
A baud rate of 19200 bps and a device polling delay of 260 ms are recommended for network functionality.
Register
Name
R/W Retentive Signed Format
Range
Default
Description
Detail
Contr
ol
1
Run Command
R/W
x
0,1,2
0=Stop=clear Fault(s); 1=Reverse; 2=Forward;
99=Reset
2
Torque Reference
R/W
xxx
1...100
Percentage of full torque. Torque output determines
fan speed.
3
Operational Status
R
x
0…6
1=Comm CRC errors, 2=Drive Faulted, , 4=IGBT
temp warning, 5=Drive Inhibited (Fire Input)
4
Light Control
R/W
xxx
0..100
0
J5 0-10V Output for Optional
Light Control (%)
Resets to 0 after
power cycle
5
External Temperature
R
xxxxx -400..1100
External Temp (°C) (0.1 unit)
Based off an external
10K @ 25C NTC
thermistor
Fault
6
Last Fault Code
R
R
xxx
Integer code representing
fault history
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.
7
Second Last Fault
R
R
xxx
8
Third Last Fault
R
R
xxx
9
Fourth Last Fault
R
R
xxx
10
Fifth Last Fault
R
R
xxx
Diagnostics
11
Firmware Version
R
R
xxxxx
1-500
Incremental Version Count
12
Operating Hours
R
R
xxxxx
0-65535
Operating hours (driving
motor)
MAX 65535
13
Motor RPM
R
S
xxx
-300…300
Motor RPM (0.1 rpm)
14
Voltage, DC Bus
R
xxx
0…1000
Bus Voltage (Volts) (1 units)
15
Voltage, Output RMS
R
xxx
0…1000
RMS Modulated Output Voltage (Volts) (1 units)
16
Current, Motor RMS
R
xx.x
0…150
RMS Motor current (Amps)
(0.1 units)
17
Temperature,
Capacitor
R
S
xxx.x -300…1100
Capacitor Temp (°C) (0.1 units)
18
Temperature,
Transistor
R
S
xxx.x -400…1250
Transistor Temp (°C) (0.1
units)
Transistor to Heatsink
19
Temperature, Ambient
R
S
xxx.x -300…1350
Ambient Temp (°C) (0.1 units)
20
--Spare--
R
0
21
Communication Errors
R
xxx
0-65535
Number of errors since last
power cycle
0-65535
22
-- Spare --
R/W
0
23
-- Spare --
R/W
0
24
-- Spare --
R/W
0
25
-- Spare --
R
0
Configuration
26
KEEP ALIVE
(WatchDog)
R/W
R
xxxxx
0-65535
30
Seconds; 0 = disable
Any message resets; if
a timeout occurs, fan
will stop (if running)
27
MODBUS Serial
Speed
R/W
x
0…9
4
Baud Rate Setting
(SW2: Pin 7 ON)
0
1200 bps
1
2400 bps
2
4800 bps
3
9600 bps
4
19200 bps
5
38400 bps
6
57600 bps
7
115200 bps
28
Motor Type
R
0..2
0
13,70,170
0=13; 1 = 70; 2=170
29
MODBUS Device ID
R/W
R
1-247
2
New Device ID is set after
power cycle
30
-- Spare --
R/W
0
NOTE:
Registers 1000-1150 are reserved for internal Diagnostics and Testing.
