BONFIGLIOLI Vectron Agile, Communications Manual

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Modbus Agile 15 02/2011
RS485 and RS232 Interfaces
In some sections – as an alternative to control via the operator panel – settings and display possibili-
ties are described with the help of the VPlus PC-Software. Here, VPlus communicates with the fre-
quency inverter via the X21-Connection or via an optional CM-232 or CM-485 Communication Module.
If the serial interface of an optional CM-232 or CM-485 Communication Module is connected to a PLC,
then simultaneous access to the frequency inverter from the VPlus PC-Software is no longer possible.
In this case the connection to the PC can be made via USB with the help of an optional interface
adapter on the X21-Connection.
Warning!
Via the Modbus-Communication, a control unit can access all of the frequency inverter
parameters.
The changing of parameters, whose meaning is not known to the user, can lead to the
malfunctioning of the frequency inverter and to dangerous situations in the plant.
Caution!
If values are to be written regularly with a high repetition rate, then no entry may be
made to the EEPROM, as it only has a limited number of admissible write cycles (approx.
1 million cycles). If the number of allowed write cycles is exceeded then the EEPROM will
be damaged. See Chapter 8 "Handling of Data Sets / Cyclic Writing".
RS485-Connection
Frequency inverters can be connected to a bus system using CM-485 Communication Modules. The
bus structure is linear and implemented as a 2-wire line. Up to 247 frequency inverters can be ad-
dressed and polled from a bus master via Modbus.
The frequency inverters can be parameterized and controlled via the bus system. During operation
data can be requested and set from a PC or PLC.
RS232-Connection
The RS232-Connection allows a point to point connection between the participants.
5.1 X21-Connection
The X21-Connection with the RJ45-Connector enables the connection to the RS485 interface of a PLC.
With an optional USB-Adapter the USB-Interface of a PC can be connected to the X21 Interface. This
enables parameterization and monitoring using the VPlus PC-Software.
X21 (RJ45)
VPlus
USB
RJ45
Adapter
X21 (RJ45)
PLC
RJ45
5.2 Communication Modules
Direct connection of the CM-232 to a PC or PLC
The CM-232 Communication Module enables a direct connection between a 9-pin D-Sub connector
(X310) of the CM-232 and the serial interface of a PC or PLC.
The configuration of the installed communication module is carried out using the VPlus PC-Software or
using the Operator Panel.
With CM-232 the connection to the PC or PLC is made via a RS232-Connection Line (1:1 occupancy).
Direct connection of the CM-485 to a PC or PLC
For the direct connection between the 9-pin D-Sub Interface (X310) of the CM-485 and the serial
RS232-Interface of a PC or PLC, install an RS485/RS232 interface adapter on the signal line.
The configuration of the installed communication module is carried out using the VPlus PC-Software or
using the Operator Panel.
Attention!
The transmitter and receiver must be set to the same transfer rate (baud rate).
The set baud rate applies to the CM-232 and CM-485 communication modules.
Work Steps:
• Mount the CM-232 / CM-485 Communication Module onto the frequency inverter.
• For the CM-232 Communication Module:
Connect the CM-232 and PC with an RS232-Cable.
• For the CM-485 Communication Module:
Connect the CM-485 with a RS485-Cable to the RS485/RS232 Interface Adapter.
Connect the RS232-Connection of the Interface Adapter with the PC/PLC.
Setting the type of Protocol
The factory setting of the CM-232/CM-485 Communication Modules is the BONFIGLIOLI VECTRON
standard protocol (VABus). Communication with the VPlus PC-Software is only possible using this pro-
tocol.
The Modbus protocol enables the operation of a straight Master/Slave-System. The Bus-Master can be
a PC, a PLC or any arbitrary computer system.
5.2.1 Installation Notes
• For the RS485 bus cable use a twisted, shielded cable.
• Implement the shield as a braided shield (not a foil shield).
• Connect the cable shield surfaces at both ends to PE.
• The connector pin assignments of an RS485-Cable and an RS232-Cable are different. No data
transfer is possible if the wrong cable is used.