Microhard Systems Nano IP Series Operating Manual page 87

6.0 Configuration
Refer to Drawing 6A on the preceding page.
*COM2 does not support this function.
Refer to Drawing 6A on the preceding page.
*COM2 does not support this function.
This setting defines the serial output data framing. In Transparent
mode (default), the received data will be output promptly from the
Nano IP Series. When set to Seamless, the serial port server will
add a gap between data frames to comply with the MODBUS
protocol for example.
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.
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.
This setting effects the Quality of Service (QoS) associated with the
data traffic on the specific COM port.
© Microhard Systems Inc. CONFIDENTIAL
Pre-Data Delay (ms)
Values
ms
100
Post-Data Delay (ms)
Values
ms
100
Data Mode
Values
Seamless
Transparent
Character Timeout
Values
characters
4
Maximum Packet Size
Values
Bytes
1024
Priority
Values
Normal
Medium
High
87