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Protocol
7.2.10
Data Bytes
Numerical values are represented by ASCII-HEX characters. The value is first of all converted to HEX
notation and then, for each position transferred to ASCII charters.
Example:
7.2.11
Control Char ETX
Each data frame with parameter values is finished via the EXT character (0x03).
7.2.12
Binary Checksum (BCC)
The binary checksum (BCC) is made up of a byte which contains the ExOR operation of all bytes be-
tween STX (exclusive) and ETX (inclusive).
Only telegrams with parameter values are extended by the binary checksum. Enquiry, ACK and NAK
telegrams do not have a checksum.
Example: (see also Chapter 9.2 "Data Type Int (value range -32768 ... +32767)"
06/2010
numerical value
hex value
ASCII char.
hex value
for
sendstring
VABus Agile
1000
0x03E8
0
3
E
8
0x30 0x33 0x45 0x38
31
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