February 02, 2024
DXM1200-X2 Controller Instruction Manual
© Banner Engineering Corp. All rights reserved.
54
Server to Client Send time = (9 ×* 0.04 sec) + (8 retry wait × 0.04 sec) = 1 second
Total send/receive time = 2 seconds
Minimum timeout period = 2 seconds
Adjusting the Receive Slots and Retry Count Parameters
The number of receive slots governs how often a MultiHop device can communicate on the wireless network.
Battery-powered devices typically have DIP switches that allow the user to set the number of receive slots, which directly
affects the battery life of the radio. Adjusting the receive slots changes how often a message can be received. By default, the
receive slots are set to 4 (every 1.3 seconds). When the receive slots are set to 32, the radio listens for an incoming message
every 0.16 seconds.
Users may also leave the retry mechanism to the application that is accessing the wireless network, in this case the DXM
Controller. Adjust the number of retries in the MultiHop devices by writing the number of retries desired to Modbus register
6012. The factory default setting is 8.
Calculating the Communication Timeout for a DX80 Star Network
In the DX80 network, all Node data is automatically collected at the Gateway to be read. The DXM Controller does not use
the wireless network to access the data, which allows for much faster messaging and much lower timeout values.
For a DXM Controller with an internal DX80 Gateway, set the timeout value 0.5 seconds. If other Modbus devices are
connected to the RS-485 lines, the timeout parameter governs all communication transactions and must be set to
accommodate all devices on the bus.
Modbus TCP Client
The DXM Controller can operate as a Modbus TCP client on Ethernet. Users may define up to five socket connections for
Modbus TCP server devices to read Modbus register data over Ethernet. Use the DXM Configuration Software to define and
configure Modbus TCP client communications with other Modbus TCP servers.
Summary of Contents for DXM1200-X2
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