LED 1 LED 2 Definition/Solution
Flashing red
Gateway, DX85: Modbus communication error
For a Gateway system, a Modbus communications error indicates a bad
transmission or checksum error between the host and the Gateway de-
vice. For a GatewayPro system, a Modbus communications error indicates
a communications problem internal to the GatewayPro. For a Gateway
and Ethernet Bridge system, a Modbus communication error indicates a
communication problem between the Gateway and the Ethernet Bridge.
Solutions:
1. The default communications settings for the RS485 port are: 1
start bit, 8 data bits, no parity, 1 stop bit, and 19.2k baud. The
DX80 Gateway uses Modbus RTU protocol for all communications.
Supported Modbus function codes are 3, 6, and 16.
2. Verify the DX80 model supports RS485 serial communications.
3. RS485 termination or biasing is not supplied on the Gateway and
should be provided externally to the DX80. (Termination is not re-
quired by the Gateway, proper biasing of the serial lines is re-
quired.)
4. Bad connection or bad cable.
Flashing red
Node: No radio communication
There are two settings on every Node device used to synchronize to the
Gateway device:
• The Node must be bound to the Gateway.
• Each Node ID within that network must be set to a unique num-
ber.
Solutions:
1. If the Gateway and Node are less than two meters apart, device
communication may fail (radios may saturate). If the Gateway is
less than two meters from another Gateway, send and receive
transmissions between all devices the Gateways communicate
with fails.
2. The Gateway and Node may be too far apart to achieve synchroni-
zation – consult the factory for options.
3. Use a qualified antenna on both the Gateway and Node devices.
4. After any system parameter change, cycle the power to re-syn-
chronize all devices.
5. When a Node loses synchronization, it is programmed to attempt
re-synchronization for five seconds, then sleep for fifteen seconds.
Synchronizing may require up to twenty seconds.
6. Re-cycle power on the Gateway and Node devices.
Not blinking amber
GatewayPro: No Modbus communication
Solution:
1. The GatewayPro’s LED 2 should always be blinking amber to indi-
cate Modbus communication. If the LED 2 does not blink amber,
verify the baud rates, slave IDs, parity, and stop bits are set cor-
rectly.
2. Check the cables connecting the GatewayPro to the host device.
SureCross DX80 and Performance DX80 Product Manual
82 www.bannerengineering.com - tel: 763-544-3164 Rev. J
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