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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
Normal
Error
Invalid indoor unit
• The protocol for communication with an indoor unit is displayed by LED4.
Protocol for communication with
indoor unit
In communication via Uh Line
In communication based on old
communication protocol
(Example)
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 or TCB-IFCG1TLE central control address and SW1/SW2 setting
Indoor unit
central control
SW2 SW1
address
1
0
2
0
3
0
4
0
5
0
6
0
7
0
8
0
9
0
10
0
11
0
12
0
LED5
Lighting
Blinking
Light off
LED4
On
Blinking
Indoor unit
central control
SW2 SW1
address
0
17
1
1
18
1
2
19
1
3
20
1
4
21
1
5
22
1
6
23
1
7
24
1
8
25
1
9
26
1
A
27
1
B
28
1
Communication with the indoor unit was established
previously, but is disabled currently.
Communication with the indoor unit has never been
established.
When Modbus interface is performing communication with
the relevant indoor unit via Uh Line.
When Modbus interface is performing communication with
the relevant indoor unit based on old communication
protocol.
Indoor unit
central control
SW2 SW1
address
0
33
2
1
34
2
2
35
2
3
36
2
4
37
2
5
38
2
6
39
2
7
40
2
8
41
2
9
42
2
A
43
2
B
44
2
Installation Manual
Remarks
Note
Indoor unit
central control
SW2 SW1
address
0
49
3
1
50
3
2
51
3
3
52
3
4
53
3
5
54
3
6
55
3
7
56
3
8
57
3
9
58
3
A
59
3
B
60
3
0
1
2
3
4
5
6
7
8
9
A
B
12-EN
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