MGate 5105-MB-EIP Series User Manual
Master Mode Settings
You will need to specify which Modbus protocols will run in master mode. The MGate 5105-MB-EIP supports
Modbus RTU and Modbus ASCII protocols in master mode.
The MGate 5105-MB-EIP also provides several advanced settings for specific application requirements. The
following settings are optional for most applications. We suggest using the default settings to test the MGate
5105-MB-EIP.
Initial delay
Some Modbus servers/slaves may take more time to boot up than other devices.
In some environments, this may cause the entire system to suffer from repeated
exceptions during the initial boot-up. You can force the MGate to wait after
booting up before sending the first request with the Initial Delay setting.
Response timeout
According to the Modbus standard, the time it takes for a server/slave device to
respond to a request is defined by the device manufacturer. Based on this
response time, a client/master can be configured to wait a certain amount of time
for a server/slave’s response. If no response is received within the specified time,
the client/master will disregard the request and continue operation. This allows
the Modbus system to continue operation even if a server/slave device is
disconnected or faulty. On the MGate 5101-MB-EIP, the Response timeout field
is used to configure how long the gateway will wait for a response from a Modbus
ASCII or RTU server/slave. Please refer to your device manufacturer’s
documentation to manually set the response time.
Inter-character timeout
(only for Modbus RTU)
The time interval between characters in one frame. When the baudrate is lower
than 19200 bps, the default value is 0, which is 1.5 character time. When the
baudrate is larger than 19200 bps,the
MGate uses a predefined fixed value that is
not user-configurable. When the serial side of the MGate receives one character,
and the next one comes after the “inter-character timeout” defined, the frame will
be discarded because of timeout.
Max. retry
The number of times the client/master will retry the same request when the
response times out.
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