Wenglor A1P05, Руководство по эксплуатации

Страница: 15 / 21

15
Sensors for your success www.wenglor.com Sensors for your success www.wenglor.com
EN
Frame Layout for Data Transmission
Transmitting Partner Characters (ASCII) Receiving Partner Frame Segment
Start character / (ASCII 47) => Connect Frame header
Length information 2 Byte => Connect Frame header
Command bytes 2 Byte => Frame header
1
st
data byte 2 Byte => Data information User data
2
nd
data byte 2 Byte => User data
.. .. => Data information User data
n
th
data byte .. => Data information User data
BCC 2 Byte => Frame end
Stop bit . (ASCII 46) => Disconnect Frame end
Table 7
Connect (frame header):
In order to establish a connection with the communications partner, the Sensor transmits the start bit: “/” (ASCII 47),
followed by length information and a command byte for the data bytes.
Transmitting Data (user data):
After establishing a connection, user data are transmitted.
Disconnect (frame end):
If the NAK character is transmitted during data transfer, the wenglor
®
Sensor disconnects and establishes a new
connection. After all data have been transmitted, the wenglor
®
Sensor transmits the checksum BCC and finally
the stop bit: “.” (ASCII 46).
Data Format:
The data format for length information, user data and the checksum is always hexadecimal. The following range
of ASCII characters may occur:
“0” (ASCII 48) – “9” (ASCII 57)
“A” (ASCII 65) – “F” (ASCII 70)
Example:
Data to be transmitted: decimal 123
Decimal Hexadecimal
123d = 7Bh
= > Transmitted character string “7” (ASCII 55) “B” (ASCII 66)