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Page 18

Device Register 8 (Hex)

Message

Code

[15:8]

Data Field

[7:0]

Description

Radio Device (polling/heartbeat) Timeout. (Decimal value 13569.) A Node is

determined to be out of the wireless network based on the parameters defined for

polling or heartbeat. See the documentation in the UCT for polling or heartbeat

parameters and the timeout operation. When the least significant bit is on (1), an

error condition exists.

•

Run site survey to determine the quality of the RF link. If no communications

exist between the Gateway and Node, verify the power at the Node and all

antenna connections. The blocking of RF communications may also be a result

of environmental conditions that may have changed.

•

The battery of a battery powered Node may need to be replaced. Although

the LCD and device may appear functional, the battery may not have enough

capacity to handle the current requirements of RF communications.

Modbus time-out. A Gateway timeout (time of inactivity on the serial channel) was

detected. (Decimal value 13825.) When the least significant bit is on (1), an error

condition exists.

Modbus register 8 device messages are disabled. The Modbus register 8 clears or

disables messages using the Gateway’s Modbus register 15. (Decimal values 65024

through 65279.)

Host Controller Systems