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Modbus interface
7
Test run check
Before starting test run
• Set the indoor unit central control address so that it does not match any other indoor unit addresses.
• Be sure to press the reset switch SW7 on the Modbus interface when the indoor unit central control address
setting has been changed or added.
Test run
(1) Check the communication status between Modbus interface and indoor unit or TCB-IFCG1TLE with LED5.
Check that the communication between Modbus interface and each indoor unit or TCB-IFCG1TLE connected
is normally performed by selecting an indoor unit or TCB-IFCG1TLE using SW1 to SW3.
Confirming procedure:
• Set bit2 of SW3 to "ON" during normal operation.
• Set the central control address of the target indoor unit with SW1 and SW2. Set SW1 and SW2 according to
the "Indoor unit central control address and SW1/SW2 setting" table below.
• Communication status is displayed by LED5.
Communication status with indoor unit
• The protocol for communication with an indoor unit is displayed by LED4.
Protocol for communication with
In communication via Uh Line
In communication based on old
communication protocol
(Example)
Indoor unit or TCB-IFCG1TLE central control address and SW1/SW2 setting
Indoor unit
central control
address
1
2
3
4
5
6
7
8
9
10
11
12
17-EN
Normal
Error
Invalid indoor unit
indoor unit
Check the communication status of indoor unit with a central control address of 41.
Set bit2 of SW3 to "ON", SW2 to "2" and SW1 to "8".
Indoor unit
SW2 SW1
central control
address
0
0
17
0
1
18
0
2
19
0
3
20
0
4
21
0
5
22
0
6
23
0
7
24
0
8
25
0
9
26
0
A
27
0
B
28
LED5
Lighting
Communication with the indoor unit was established
Blinking
previously, but is disabled currently.
Communication with the indoor unit has never been
Light off
established.
LED4
When Modbus interface is performing communication with
On
the relevant indoor unit via Uh Line.
When Modbus interface is performing communication with
Blinking
the relevant indoor unit based on old communication
protocol.
Indoor unit
SW2 SW1
central control
address
1
0
33
1
1
34
1
2
35
1
3
36
1
4
37
1
5
38
1
6
39
1
7
40
1
8
41
1
9
42
1
A
43
1
B
44
Installation Manual
Remarks
Note
Indoor unit
SW2 SW1
central control
address
2
0
49
2
1
50
2
2
51
2
3
52
2
4
53
2
5
54
2
6
55
2
7
56
2
8
57
2
9
58
2
A
59
2
B
60
SW2 SW1
3
0
3
1
3
2
3
3
3
4
3
5
3
6
3
7
3
8
3
9
3
A
3
B
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