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4.1.2 Setting the Modbus Slave ID on the I/O Base Board
Only DXM100-S1 and -S1R2 Slave models require that the Modbus Slave ID to be adjusted on the I/O base board. The
DXM100-Sx Modbus Slave models use DIP switches J and K to set the Modbus Slave ID. This device can use a Modbus
register 6804 in the I/O board to access the full range of Modbus Slave IDs.
On the DXM100-Sx Modbus Slave models, use the DIP switches at location K to define the lower digit of the Modbus Slave
ID.
DIP Switch location J defines the course group of Modbus Slave IDs. DIP Switch 4 must be set to ON for DXM100-S1,
DXM100-S2, DXM100-S1R2, and DXM100-S2R2 models.
Settings
Location J DIP Switches
1
2
3
4
Modbus Slave ID set to 11 through 19
OFF
OFF
Modbus Slave ID set to 20 through 29
ON
OFF
Modbus Slave ID set to 30 through 39
OFF
ON
Modbus Slave ID set to 40 through 49
ON
ON
Not Used
-
Modbus Slave Configuration (DX100-S1 and -S1R2 models only) 3
ON
Standard Communication Mode
OFF
DIP Switches J
DIP Switch K, Switches 1, 2, 3, 4 (0 is OFF, 1 is ON)
1
2
0,0,0,0
1,0,0,0
0,1,0,0
1,1,0,0
0,0,1,0
1,0,1,0
0,1,1,0
1,1,1,0
0,0,0,1
1,0,0,1
OFF
OFF
x 4
11
12
13
14
15
16
17
18
19
ON
OFF
20
21
22
23
24
25
26
27
28
29
OFF
ON
30
31
32
33
34
35
36
37
38
39
ON
ON
40
41
42
43
44
45
46
47
48
49
DXM100-Sx Modbus Slave Example
—To set the DXM100-Sx Modbus Slave to a Modbus Slave ID of 34, set the following:
Location J DIP switches set to 1=OFF, 2=ON
Location K DIP switches set to 1=OFF, 2=OFF, 3=ON, 4=OFF
The location J DIP switches set the upper Modbus Slave ID digit to 3 while the location K DIP switches set the lower digit to
4.
Setting the DXM I/O Board Modbus Slave ID using Modbus Registers
—Write to the I/O board's Modbus register 6804 to
set the Modbus Slave ID to any valid Modbus Slave ID (1 through 245).
•
For the DXM100-Sx Modbus Slave model, all switches on DIP switch K should be in the OFF position to use the
Modbus register slave ID.
4.2 Applying Power to the DXM100-Sx Modbus Slave
Apply power to the DXM100-Sx Modbus Slave using either 12 to 30 V DC or a 12 V DC solar panel and 12 V sealed lead
acid battery.
Pin
Description
Pin 1
No connection
Pin 2
12 to 30 V DC input (+) or solar panel connection (+)
Pins 3, 5, 8, 17, 26, 29
Main logic ground for the DXM100-Sx Modbus Slave
Pin 4
Solar or backup battery positive input. Battery voltage must be less than 15 V dc. Use only a sealed lead
acid (SLA) battery.
3 Must be in the ON position for the -S1 and -S1R2 model)
4 Uses value in Modbus register 6804.
Sure Cross
®
DXM100-Sx Wireless Modbus Slave
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