DeviceMaster PNIO | UP User Guide
: 2000639 Rev. A
Configuring an Ethernet Device - 65
Configuring an Ethernet Device
Ethernet Device Configuration - Ethernet Packet
Rx Detect
Delimiters from
Ethernet Device
Start of
Transmission
(STX)
When enabled, the DeviceMaster detects an STX (start of
transmission) byte sequence which is configured as
one byte
or
two bytes
when it receives a Ethernet packet.
The length indicates the number of STX bytes, valid values for
length are:
•
none
- Disables this function and the DeviceMaster accepts
the first byte received after the last ETX byte(s) as the
start of the next data packet.
•
one byte
- Scans Ethernet data for one STX byte and when
the DeviceMaster finds an STX byte it collects the data. If
the first byte is not the STX byte, it discards the byte. The
DeviceMaster continues to discard the bytes until it finds
an STX byte.
•
two bytes
- Scans Ethernet data for two STX bytes and
when the DeviceMaster finds two STX bytes it collects the
data. If the STX bytes cannot be found, it discards the
bytes. The DeviceMaster continues to discard the bytes
until it finds the two STX bytes.
Byte 1
- Specifies the character that represents the first STX
byte. The DeviceMaster looks for this character in 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 character that represents the second STX
byte. The DeviceMaster looks for this character in the second
STX byte, only if the length is
two bytes
. You can specify a value
between 0 and 255 in decimal format.
Rx Detect
Delimiters from
Ethernet 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 Ethernet 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 Ethernet data for one ETX byte and when
the DeviceMaster finds the ETX byte, it identifies the data
as a Ethernet packet.
•
two bytes
- Scans Ethernet data for two ETX bytes and
when the DeviceMaster finds the ETX bytes, it identifies
the data as a Ethernet 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.
Содержание 99531-9
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