MGate 5105-MB-EIP Series User Manual
Inter-frame delay
(only for Modbus RTU)
Defines the time interval between an RTU response and the next RTU request.
When the baudrate is lower than 19200 bps, the default value is 0, which is 3.5
character time. When the baudrate is larger than 19200 bps, the MGate uses a
predefined fixed value that is not user-configurable. This function solves the issue
that some devices can't handle the RTU requests that quickly, so the MGate opens
to user-defined values.
How to calculate Modbus character time?
E.g., if the baudrate is 9600 bps, 1 character time is about 1 ms. In a serial frame
(11 bits, including start bit, data, parity bit, and stop bit), 9600 bps approximately
equals to 960 characters/s, so transmitting 1 character needs about 1/960 = 1
ms.
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