Telegram Types; Used Symbols - BONFIGLIOLI Vectron Agile Communications Manual

7.2

Telegram Types

The telegram setup must be complied with to ensure the correct communication to the device.
7.2.1

Used Symbols

Control characters and data are transmitted in the sent data telegrams. The information is always
represented in ASCII or HEX-ASCII data format (except for the representation of the checksum).
Structure of a data telegram
ADR STX SYS
The following table shows the symbols and data formats used.
Character Function
EOT Control character End_Of_Transmission
Address of the selected frequency inverter (Node-ID + 0x30). See Chapter 7.2.5
ADR
"Address Representation".
STX Control character Start_of_Text
SYS System Node-ID (Node-ID + 0x40). See Chapter 7.2.7 "Systembus Node-ID".
ds Data Set number
nnn Parameter number
aa No. of subsequent data bytes
www...www Data bytes
ETX Control character End_of_Text
ENQ Control character Enquiry
BCC Binary-Checksum, any ASCII character. See Chapter 7.2.12. "Binary Checksum
BCC
(BCC)".
ACK Control character Acknowledge (positive acknowledgement)
NAK Control character Negative_Acknowledge (negative acknowledgement)
5
represented as ASCII decimal numbers
6
represented as ASCII-HEX numbers
26
ds n n n a a
Characters in Data Telegram
w w ... w w
(0, 1, 2, 3 ... 9
(000 ... F99)
(01 ... 99)
(0 ... F)
VABus Agile
Protocol
ETX BCC
Control chars.
Data bytes
Number of
data bytes
Parameter no.
Data Set no.
Sys Node ID
Control char.
RS Node ID
5
6
06/2010