AERMEC TRS Series - 12.1 Table of Modbus Address; Modbus

64
TRS
24/07 5979398_00
12 MODBUS
The variables that can be managed via Modbus are identied in the following table where the following default values are
expressed:
— Modbus protocol: RTU
— Speed: 4800bps / 9600bps
— Parity: none
— Stop bit: 1
— Data bit: 8 (xed)
— Address: slave 1
12.1 TABLE OF MODBUS ADDRESS
Modbus
address
Content Range Default Access Record Position
00 Power to auto restart 0-1 1 Read / Write Circuit board
01 Electric heater available (n.d.) 0-1 0 Read / Write Control panel
02 By-pass opening temperature X 5…30 19 °C Read / Write Circuit board
03
By-pass opening temperature
range Y
2...15 3 °C Read / Write Circuit board
04 Defrost interval 15-99 30 min Read / Write Circuit board
05 Defrosting enter temperature -9….+5 -1 °C Read / Write Circuit board
06 Defrost duration time 2-20 10 min Read / Write Circuit board
07 CO
2
sensor 24-255 (unit = x10 PPM) 0 Read / Write Circuit board
08 Modbus address 1-16 1 Read / Write Circuit board
09 ERV ON/OFF 0-OFF / 1-ON Read / Write Circuit board
10 Supply fan speed
Fan speed: 0 = stop, 2 = speed 1 3 = speed 2, 5
= speed 3, 8 = speed 4, 9 = speed 5, 10 = speed
6, 11 = speed 7, 12 = speed 8, 13 = speed 9, 14
= speed 10
Read / Write Circuit board
11 Exhaust fan speed
Fan speed: 0 = stop, 2 = speed 1 3 = speed 2, 5
= speed 3, 8 = speed 4, 9 = speed 5, 10 = speed
6, 11 = speed 7, 12 = speed 8, 13 = speed 9, 14
= speed 10
Read / Write Circuit board
12 Ambient temperature observed value (showing number minus 40) Read Circuit board
13 Outdoor Temperature observed value (showing number minus 40) Read Circuit board
14 Exhaust air temperature observed value (showing number minus 40) Read Circuit board
15 Defrosting temperature observed value (showing number minus 40) Read Circuit board
16 External ON/OFF signal
Query value, 0-switched OFF from external
signal, 1-switched ON from external signal
Read. If in ON,
then fan at high
speed
Circuit board
17 CO
2
ON/OFF signal
Query value, 0-switched OFF from CO
2
signal
under threshold, 1-switched ON from CO
2
signal
above threshold
Read. If in ON,
then fan at high
speed
Circuit board
18 Defrosting signal
Query value
B3- 1- defrosting
Reserved Circuit board
19 Humidity setting value 1-99 65 Read / Write Circuit board
20 Error symbol
Query value:
B0-OA sensor error B1-EEPROM error
B2 - RA temp. sensor error B3 - EA temp. sensor
error
B5 - SA temp. sensor error
B6 - Supply fan error
B7 - Exhaust Fan error
Read Circuit board
21 ERV models selection Reserved Circuit board
22 Defrosting models 0 Read / Write Circuit board
23 Mode of fan speed displaying
0 - Two speeds (AC motor)
1 - Three speeds (AC motor)
2 - Ten speeds (DC motor)
2 Reserved Circuit board
24 Multifunction Setting
0 - None
1 - Reset timer of fan operation
0 Read Circuit board
25 Filter alarm setting
0 - Pressure switch 1 - After 60 days, 2 - After 90
days, 3 - After 180 days
0 Read / Write Circuit board
26
OA pre-heater activated
temperature
0-15
Activated temp= (Input value - 15)°C
10 (means
-5°C)
Read / Write Circuit board
27
Post-Heater ON/OFF temperature
setting
10-25 25 Read / Write Circuit board