25
AIR BOOSTER 2
© STULZ SpA . – all rights reserved EN/10.2018/IT30I
5.6. Modbus RTU datapoint
Digital data point
Modbus -
Address (hex)
Modbus-
Address (Dec) Description
Modbus
range
Mapped
meaning
BMS-
Access
Modbus-
Function
210
528
High Pressure
0/1
ok/error
r
1
211
529
Fan Block
0/1
off/on
r
1
212
530
Fan Block serious alarm
0/1
no alarm / alarm
r
1
213
531
Damper Block
0/1
off/on
r
1
214
532
Motor Block
0/1
off/on
r
1
200
512
Device ON
FF00 (65280) on
w
5
200
512
Device OFF
0000 (0)
off
w
5
203
515
Keyboard LOCK
FF00 (65280) locked (on)
w
5
203
515
Keyboard UNLOCK
0000 (0)
unlocked (off)
w
5
204
516
Alarm mute
FF00 (65280) muted (on)
w
5
Analog data point
Modbus -
Address (hex)
Modbus-
Address (Dec) Description
Mapped meaning BMS-Access Modbus- Function
100
256
Probe 1
°C/°F
r
3
101
257
Probe 2
°C/°F
r
3
102
258
Probe 3
°C/°F
r
3
103
259
Average Active Probe Value
°C/°F
r
3
104
260
Max active probe value
°C/°F
r
3
105
261
Probe 4
bar/Pa
r
3
106
262
Fan speed
%
r
3
107
263
Damper position
%
r
3
110
272
Min Fan Speed
%
r
3
111
273
Max Fan Speed
%
r
3
112
274
Min Damper Value
%
r
3
113
275
Max Damper Value
%
r
3
114
276
Device On
h
r
3
300
768
SetPoint Temperature
°C/°F
rw
(3)6
301
769
SetPoint Pressure
bar/Pa
rw
(3)6
BMS-Access:
r= read
w= write
Modbus- Function:
01: Read Coil (Digital Output Registers)
02: Read Digital Input Status Function
03: Read Holding Registers
04: Read Input Registers
05: Write Single Coil
06: Write Single Holding Register
The following parameters may have to be adjusted on the controller of the unit:
• Modbus-Address: Adr
• Baud Rate selection: br
