© Microhard
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4.0 Configuration
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)
256
When enabled the data will continue to buffer received on the
serial data port when the radio loses synchronization. When
disabled the pMDDL5824 will disregard any data received on
the serial data port when radio synchronization is lost.
No
-
Connection Data
Values (selection)
Disable
/ Enable
This option will enable or disable the MODBUS decoding and
encoding features.
MODBUS TCP Status
Values (selection)
Disable
/ Enable
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)
24
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).
This setting defines the serial output data framing. In Transparent
mode (default), the received data will be output promptly from the
pMDDL5824.
Data 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.
Summary of Contents for pMDDL5824
Page 23: ...Microhard 23 3 1 1 pMDDL5824 OEM Mechanical Drawing 3 0 Hardware Features...
Page 24: ...Microhard 24 3 1 2 pMDDL5824 PCB PAD Placement 3 0 Hardware Features...
Page 29: ...Microhard 29 3 0 Hardware Features 3 2 1 pMDDL5824 Development Board Mechanical Drawings...
Page 30: ...Microhard 30 3 0 Hardware Features 3 2 2 pMDDL5824 Enclosed Mechanical Drawings...
Page 114: ...Microhard 114 Appendix B Sample Interface Schematic...
