User's Manual

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Mode
Click the currently shown Modbus mode (RTU Master shown in previous figure) for each port for further
setting. It includes the mode of the Connected serial device, Response timeout, Inter-character
timeout, and Inter-frame delay.
Parameter Value Default
Connected serial device
RTU Slave,
RTU Master,
ASCII Slave,
ASCII Master
RTU Slave
Response timeout 10 – 120000 ms 1000 ms
Inter-character timeout 10 – 500 ms, 0 for auto 0
Inter-frame delay 10 – 500 ms, 0 for auto 0
Connected serial device
This field is to assign the role of the connected serial device, please refer to the manual of the serial
devices for the setting.
Response timeout
This field is used to configure how long the gateway will wait for a response from a Modbus ASCII or
RTU slave. This field is set independently for each serial port, which is selected through the “Protocol
Assignment” field. Please refer to your device manufacturer’s documentation to manually set the
response time-out.
The MGate W5X08 series gateway also provides automatic calibration of the response timeout. Instead
of manually figuring out the appropriate setting, you can click “Auto Detection” to have the MGate
automatically figure out the time-out setting. Once a value has been recommended, you can fine-tune it
for best performance.
Inter-Character Timeout
Use this function to determine the timeout interval between characters for Modbus devices that cannot
receive Rx signals within an expected time interval. If the response is timed out, all received data will be
discarded. Note that this timeout mechanism only works in RTU slave mode. The MGate W5X08
gateway will automatically determine the timeout interval if the timeout value is set to 0.
Inter-Frame Delay
In Modbus RTU slave mode, user can determine the time-delay to transmit the data frame received
from the slave device to the upstream. The MGate W5X08 gateway will automatically determine the
time interval if it is set to 0.
Slave ID
The Slave ID Map tab is where slave IDs are managed. The definitions on this tab determine how
requests will be routed by the unit.
Parameter Value Default
Remote IP address (Max 40 characters) null
TCP Port 0 - 65535 null
Slave ID Start 0 – 255 0
Slave ID End 0 - 255 0
Slave ID Offset -255 ~ 255 0