DeviceMaster PNIO | UP User Guide
: 2000639 Rev. A
Configuring a Serial Port - 57
Configuring a Serial Port
Rx Detect
Delimiters from
Serial Device
End of
Transmission
(ETX)
When enabled, the DeviceMaster detects an ETX (end of
transmission) byte sequence that is configured as
one byte
or
two bytes
marking the end of the serial packet.
The length indicates the number of ETX bytes, valid values for
length are:
•
none
- Disables this function and the DeviceMaster uses
the
Rx Timeout Between Packets
to indicate the end of data
packet.
•
one byte
- Scans serial data for one ETX byte and when the
DeviceMaster finds the ETX byte, it identifies the data as a
serial packet.
•
two bytes
- Scans serial data for two ETX bytes and when
the DeviceMaster finds the ETX bytes, it identifies the
data as a serial packet.
Byte 1
- Specifies the character to scan for in the first ETX byte,
if the length is
one byte
or
two bytes
. You can specify a value
between 0 and 255 in decimal format.
Byte 2
- Specifies the character to scan for in the second ETX
byte, if the length is
two bytes
. You can specify a value between
0 and 255 in decimal format.
Tx Append
Delimiters from
PLC
Start Transmission
(STX)
When enabled, the DeviceMaster appends an STX (start of
transmission) byte sequence which is configured as
one byte
or
two bytes
to the beginning of the serial packet before it is sent.
The length indicates the number of STX bytes, values for
length are:
•
none
- Disables this function.
•
one byte
- Inserts one STX byte before the data.
•
two bytes
- Inserts two STX bytes before the data.
Byte 1
- Specifies the transmit character associated with the
first STX byte, if the length is
one byte
or
two bytes
. You can
specify a value between 0 and 255 in decimal format.
Byte 2
- Specifies the transmit character associated with the
second STX byte, if the length is
two bytes
. You can specify a
value between 0 and 255 in decimal format.
Tx Append
Delimiters from
PLC
End Transmission
(ETX)
When enabled, the DeviceMaster appends an ETX (end of
transmission) byte sequence which is configured as
one byte
or
two bytes
to the end of the serial packet before it is sent.
The length indicates the number of ETX bytes, valid values for
length are:
•
none
- Disables this function.
•
one byte
- Inserts one ETX byte at the end of the data.
•
two bytes
- Inserts two ETX bytes at the end of the data.
Byte 1
- Specifies the transmit character associated with the
first ETX byte, if the length is set to
one byte
or
two bytes
. You
can specify a value between 0 and 255 in decimal format.
Byte 2
- Specifies the transmit character associated with the
second ETX byte, if the length is
two bytes
. You can specify a
value between 0 and 255 in decimal format.
Serial Port Configuration - Serial Packet (Continued)