45 TR80 - Installation and Operation Guide
3. 9. 2 Fan Speed Control
'User fan speed' (input register 201) changes every time the user makes a fan-speed adjust-
ment on the wall module.
'Fan speed feedback' (holding register 1202) is used for local display when the user fan speed
is selected as AUTO.
‘Fan UI attributes’ (holding register 2208) register description:
• Bit 0: Allow fan override (0: not allowed; fan button disabled / 1: Override allowed)
• Bit 1: Display type for single-stage fan (0: 1 bar, 1: 3 bars)
Register
type
Relative
Address
Absolute
Address
Dir Name
Config
parameter
Type Range
Default
value
Holding 2204 42205 R/W Fan type 204 enum
0: no fan
1: Single speed fan
2: 2-speed fan
3: 3-speed fan
4: EC fan
3
Holding 2205 42206 R/W
EC Fan speed
adjust step size
205 enum
0: 1%
1: 2%
2: 5%
3: 10%
4: 20%
3
Holding 2206 42207 R/W
Fan speed low-
limit
206 Int
0-100 % for EC
fans,
0-3 for others
0
Holding 2207 42208 R/W
Fan speed high-
limit
207 Int
0-100 % for EC
fans,
0-3 for others
100
Holding 2208 42209 R/W Fan UI attributes 208 bitwise See below 1
Holding 1202 41203 R/W
Fan speed
feedback
- int
EC Fans: 0..100%
Others: 0..3
Unknown/invalid:
32767
32767
Input 201 30202 R User fan speed - int
EC Fans: 0..100%
Others: 0..3 (Off-Lo-
Med-Hi)
Auto= 0x7FFF
32767