3.1.4 Transmit Power Levels/Frame Size
The 900 MHz data radios can be operated at 1 watt (30 dBm) or 0.250 watt (24 dBm). For most models, the default transmit
power is 1 watt.
For 2.4 GHz radios, the transmit power is fixed at 0.065 watt (18 dBm) and DIP switch 5 is used to set the frame timing. The
default position (OFF) sets the frame timing to 60 milliseconds. To increase throughput, set the frame timing to 40
milliseconds. For battery-powered devices, increasing the throughput decreases battery life.
Important:
Prior to date code 15341 and radio firmware version 3.6, the frame timing was 40 ms (OFF) or
20 ms (ON).
3.2 Modbus Registers for the MultiHop Radio Board Module
The DX80 MultiHop master radio is a tree-based architecture device that allows for repeater radios to extend the wireless
network. Each device in a MultiHop network is a Modbus device with a unique Modbus ID.
Modbus registers in a MultiHop network are contained within each individual radio device. To obtain Modbus register data
from a MultiHop device, configure the DXM700 to access each device across the wireless network as an individual Modbus
slave device.
Table 4: Example MultiHop Modbus registers with generic devices.
MulitHop Device
Slave ID
Modbus Registers
DXM Master radio
1
none
Slave radio
11
Modbus register 1–16 are inputs, 501–516 are outputs
Repeater radio
12
Modbus register 1–16 are inputs, 501–516 are outputs
Slave radio
15
Modbus register 1–16 are inputs, 501–516 are outputs
3.3 DIP Switch Settings for the Performance Gateway Radio Module
The 900 MHz radios transmit at 1 Watt (30 dBm) or 250 mW (24 dBm). The 250 mW mode reduces the radio's range but
improves the battery life in short range applications. For 2.4 GHz models, this DIP switch is disabled. The transmit power for
2.4 GHz is fixed at about 65 mW EIRP (18 dBm).
Figure 14. DIP switch bank 1 and bank 2
DIP Switch
Bank 1
Button
LED
DIP Switch
Bank 2
1
1
ON
ON
Antenna
2
3
4
2
3
4
Table 5: DIP switch settings for bank 1 (D1)
DIP Switch
1
OFF
1 Watt (30 dBm, 900 MHz models only) (default configuration)
ON
250 mW (24 dBm, 900 MHz models only), DX80 compatibility
mode
3.4 Modbus Registers for the Performance Gateway Radio Module
The DX80 Performance Gateway is a star-based architecture device that contains all the Modbus registers for the wireless
network within the Gateway. To access any input or output values within the entire wireless network, read the appropriate
Modbus register from Gateway.
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DXM700-Bx Wireless Controller
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