© Microhard Systems Inc. 53
4.0 WebUI Configuration
Pre-Data Delay (ms)
Values (ms)
Refer to Drawing 3A.
*COM2 does not support this function.
100
Post-Data Delay (ms)
Values (ms)
Refer to Drawing 3A.
*COM2 does not support this function.
100
Data Mode
Values
This setting defines the serial output data framing. In Transparent mode
(default), the received data will be output promptly from the IPn3G. When
set to Seamless, the serial port server will add a gap between data frames
to comply with the MODBUS protocol for example.
Seamless
Transparent
Character Timeout
Values
characters
4
The serial server also uses this parameter to determine the time gap inserted between frames. It is meas-
ured in ‘characters’ and related to baud rate.
Example: If the baud rate is 9600bps, it takes approximately 1ms to move one character. With the Char-
acter 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).
In Seamless mode (see Data Mode), 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.
Maximum Packet Size
Values (Bytes)
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.
1024
Priority
Values
This setting effects the Quality of Service (QoS) associated with the data
traffic on the specific COM port.
Normal
Medium
High
To Next Page
Loading...
