© Microhard Systems Inc.
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4.0 Configuration
Refer to
Drawing 6A
on the preceding page.
Pre-Data Delay
Values (time (ms) )
100
Refer to
Drawing 6A
on the preceding page.
Post-Data Delay
Values (time (ms) )
100
This setting defines the serial output data framing. In
Transparent mode (default), the received data will be output
promptly from the IPn4G.
Date Mode
Values (selection)
Seamless /
Transparent
When set to Seamless, the serial port server will add a gap between data frames to comply with
the MODBUS protocol for example. See ‘Character Timeout’ below for related information.
In Seamless mode (see Data Mode described on the preceding
page), this setting determines when the serial server will
consider the recently-received incoming data as being ready to
transmit. As per the MODBUS standard, frames will be marked
as ‘bad’ if the time gap between frames is greater than 1.5
characters, but less than the Character Timeout value.
Character Timeout
Values (characters)
0
The serial server also uses this parameter to determine the time gap inserted between frames.
It is measured in ‘characters’ and related to baud rate.
Example: If the baud rate is 9600bps, it takes approximately 1ms to move one character. With
the Character Timeout set to 4, the timeout period is 4ms. When the calculated time is less than
3.5ms, the serial server will set the character timeout to a minimum value of 3.5ms.
If the baud rate is greater than 19200bps, the minimum character timeout is internally set to
750us (microseconds).
Defines the buffer size that the serial server will use to receive
data from the serial port. When the server detects that the
Character Timeout criteria has been met, or the buffer is full, it
packetizes the received frame and transmits it.
Maximum Packet Size
Values (bytes)
1024
This setting effects the quality of service associated with the
data traffic on the COM port.
Priority
Values (selection)
Normal
/ Medium / High
