Protocol; Character Format - BONFIGLIOLI Vectron Agile Communications Manual

Protocol

7 Protocol
The VABus protocol is the standard protocol of BONFIGLIOLI VECTRON. It defines and describes the
communication via the RS232 / RS485 serial interfaces.
By default, the slot for an optional Communication Module and the X21-Connection are set to the
VABus protocol. The setting can be changed via Parameter
"Set the Protocol for X21-Connection and Communication Modul".
The VABus protocol enables the operation as a pure Master/Slave system. A PC, a PLC or any type of
computer system is the bus master.
The transmission protocol corresponds to the ISO standard 1745 for code-based information transfer
and applies to the X21-Connection and the CM232 and CM-485 Communication Modules.
Two types of request are used:
− Send Request (Enquiry Telegram) for the request for reading parameters in the frequency inverter
by the bus master.
− Setting Request (Select Telegram) for handing over parameter values or parameter settings to the
frequency inverter by the bus master.
7.1

Character Format

The characters are based on 7-bit code according to DIN 66003 and consists of:
− 1 start bit
− 7 information bits
− 1 parity bit
− 1 stop bit
Character format:
Start B1
The start bit is followed by the least significant data bit.
06/2010
(7 data bits B1... B7) corresponds to dec. value 0 ... 127
(even parity)
B2 B3 B4
Protocol (CM/X21)
B5 B6 B7
VABus Agile
395. See Chapter 5.4
Parity Stop
25