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Modbus Agile 13 02/2011
Installation of an optional Communication Module
4 Installation of an optional Communication Module
4.1 Assembly
The communication module is pre-assembled in a casing. Additionally, a PE spring is enclosed for PE
connection (shield).
Caution!
The frequency inverter must be disconnected from the power supply before installation of
the communication module.
Installation under voltage is not permitted and will destroy the frequency inverter and/or
the communication module.
Do not touch the PCB visible on the back of the module, otherwise components may be
damaged.
• Remove the cover of the module slot.
1
• Attach the PE spring (1) using the screw provided on
the frequency inverter.
2
3
•
Insert the communication module (2).
• Screw the communication module (2) onto the fre-
quency inverter with the screw provided (3).
• Break off the pre-punched cut-out from the cover.
• Replace the cover.
4.2 Disassembly
• Remove the cover of the module slot.
2
1
•
Loosen the screw (1) on the communication module.
• Using a small screwdriver, firstly unlock the right and then the
left snap-in hook (2).
• Remove the communication module from the slot.
• Unscrew the PE spring.
• Replace the cover onto the frequency inverter.
5 RS485 and RS232 Interfaces
The frequency inverter can be controlled from a PLC or another master device via a serial interface
using the Modbus or VABus protocol. The VABus protocol is required for the parameterization with the
VPlus PC-Software.
The connection can be established via the RJ45-Connector of the X21-Connection or via an optional
Communication Module.
The following protocols can be selected:
− Modbus RTU
− Modbus ASCII
− VABus
X21-Connection Communication Module
CM-232 (DB9)
CM-485 (DB9)
CM-485T
RJ45
- Modbus (RTU/ASCII)
- VABus
- Modbus (RTU/ASCII)
- VABus
The communication with the Modbus-Protocol can be established via:
− the RJ45-Connector of the X21-Connection
− the CM-232 Communication Module with RS232-connection using a 9-pin D-Sub connector
− the CM-485 Communication Module with RS485-connection using a 9-pin D-Sub connector
− the CM-485T Communication Module with RS485-connection using a 7-pin terminal socket
The Modbus communication is possible either via the RJ45-Connector of the X21-Connection or via an
optional Communication Module. Simultaneous Modbus communication via the X21-Connection and an
optional Communication Module is not possible.
Simultaneous VABus communication is possible via the X21-Connection and an optional Communica-
tion Module.
Possible Combinations of VABus with Modbus:
Communication Module X21 (RJ45)
Modbus (RTU or ASCII) and VABus
VABus and Modbus (RTU or ASCII)
VABus and VABus
Combination Options with the Scope Function:
Communication Module X21 (RJ45)
VABus and Scope Function (VABus)
Scope Function (VABus) and VABus
Scope Function (VABus) and Modbus (RTU or ASCII)
Modbus (RTU or ASCII) and Scope Function (VABus)
The Scope Function is started via the VPlus PC-Software. The Scope Function cannot be started via
VPlus and an optional Communication Module at the same time.
The baud rates for the X21-Connection and the Communication Module can be set separately.
Note:
This document is not basic information for the RS232 or RS485 serial interface. Fundamental know-
ledge of the Modbus protocol and the RS232 and RS485 serial interfaces is a prerequisite.