Transmission Control Characters - Honeywell 026380.00 Montage- Und Bedienungsanleitung

Contactless reader with RS-232-interface
Relay
Card content
Keypad

4. Transmission Control Characters

ACK0 Alternating positive feedback
ACK1 A lternating positive feedback
ACK2 Feedback after collective telegram; Received collective telegram correctly
ACK3 Feedback after collective telegram; Received collective telegram not
correctly
DLE Data transmission changeover
ENQ Terminal enquiry
EOT End of transmission
ETX End of text
NAK Negative feedback
RIR Interruption for inversion
STX Start of text
WACK Delayed positive feedback
BCC Checksum
There are several possibillities of variations in arrangemant and determination of the
transmission control characters. I
two character strings beginning with DLE. Please find the variations in the table below, as
well as the ASCII-digits
Control character
ACK0
ACK1
ACK2
ACK 3
DLE
ENQ
EOT
ETX
NAK
RIR
STX
WACK
The example displays a typical transmission:
End of transmission caused by sender
ENQ
STX
ACK0
Data = 30H relay off
= 31H relay on
Data = 10 ASCII-digits
Data = 1 ASCII-digit per pressed key
nstead of ACK0 and ACK1 f
used for the control characters.
ASCII
hexadecimal
10 30
10 31
10 32
10 33
10
05
04
03
15
10 3C
02
10 3D
TEXT ETX
Connection and
combined of the
control characters
DLE and 0
DLE and 1
DLE and 2
DLE and 3
-
-
-
-
-
DLE and <
-
DLE and =
BCC EOT
ACK1
Operation
Instructions 11
or example, there are used
Sender
Receiver