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1.3 Name of Parts in the Modbus Adapter
See the state of removed top panel in Figure 1.4. See the name and functions in below figure.
SW12
SW3
SW4
SW9
SW11
SW8
SW7
SW5
SW6
SEG2
SEG1
LED6
LED5
LED10
LED7
LED8
LED9
Screw to fix top cover
（
× 4
）
Slide switch for MCU operation mode
and RS-485 circuit
（
× 2
）
（
SW12
、
SW3
）
MCU
7 segment digital tube LED
，
display
（
SEG1
、
SEG2
）
Slide switch for Air conditioner RS-485
circuit setting terminal resistance
（
× 1 DSW2 on the slave base plate)
Slide switch for air conditioner circuit
setting terminal resistance
（
× 1
）
（
DSW3
）
Stud to fix main and slave base plate
Reset switch
（
× 1
）
Press
（
SW4
）
to reset the product
Slide switch
（×
2
）
（
SW11
、
SW9
）
Tacting switch
（
× 4
）
（
SW6
、
SW5
、
SW8
、
SW7
）
LED light post
（
× 6
）
Screw hole to fix on the wall
（×
4
）
,
remove the rubber feet,Use M3
screw to fix
DSW2
DSW3
Figure 1.4 Name of parts in the Modbus adapter
The default slide switch setting state shown in Figure 1.5
ON
OFF
8
7
1
2
4
3
5
6
SW9
6
5
3
4
2
1
7
8
OFF
ON
SW11
ON
OFF
ON
OFF
6
5
3
4
2
1
7
8
SW3
8
7
1
2
4
3
5
6
SW12
DSW3
DSW2
1
2
ON
OFF
ON
2
1
MCU operation mode setting cannot change at any time.
When pin 1 is ON, refers to enable output 1, when pin 2 is ON, refers to enable output 2.
Indicate to activate the hardware of RS-485 loop.
Reserve.
When Pin 1 is ON, connect 75Ωterminal resistance in the H-NET communication bus.
When Pin 2 is ON, connect 120Ω RS-485 terminal resistance in the communication bus.
OFF
When Pin 3 is ON, it shows the system is connected with single board constant speed machine.
Figure 1.5 The default setting state of code switch
1 System Constitution