Toshiba BMS-IFMB1280U-E Installation Manual page 20

Modbus interface
Line address of outdoor unit and SW1/SW2 setting
Line address of outdoor unit
NOTE
For air conditioner (multi type), the line addresses of outdoor unit 29 to 32 are not used.
(3) Perform the communication status checking between Modbus interface and Modbus Master.
Check that the communication with Modbus Master is normally performed.
When bit2 of SW3 is set to "OFF", the communication status with the Modbus Master is displayed by LED5.
Communication status with Modbus Master
 LED indication during normal operation
LED1 Power indicator
LED2 RS-485 communication status indicator
LED3 Uh Line communication status indicator
LED4 Uh Line communication error indicator
LED5 TEST indicator
19-EN
SW2
1 8
2 8
3 8
4 8
5 8
6 8
7 8
8 8
9 8
10 8
11 8
12 8
13 8
14 8
15 8
16 8
Normal reception
Error
LED
SW1 Line address of outdoor unit
0 17
1 18
2 19
3 20
4 21
5 22
6 23
7 24
8 25
9 26
A 27
B 28
C 29
D 30
E 31
F 32
LED5
Lighting Lights for one second
A communication error occurred or no data has been
Light off
received.
Lights while the power is on.
Blinks during RS-485 communication.
Blinks during Uh Line communication.
Lights temporarily when Uh Line is busy.
Used in the test mode.
Installation Manual
SW2 SW1
9 0
9 1
9 2
9 3
9 4
9 5
9 6
9 7
9 8
9 9
9 A
9 B
9 C
9 D
9 E
9 F
Remarks
Description