Emerson Epsilon Eb Digital Servo Drive Modbus Communications, Multi-Drop Communications

Installation

Modbus Communications

The drive’s serial communication protocol is Modbus RTU slave with a 32 bit data extension. The Modbus protocol is available on most operator interface panels and PLC’s.

Serial Communications Specifications

Max baud rate	19.2k
Start bit	1
Stop bit	2
Parity	none
Data	8

Control Techniques’ Motion Interface panels are supplied with a Modbus master communications driver.

Multi-Drop Communications

The RS-485 option (pins 4 and 9) is provided for multi-drop configurations of up to 32 drives. Control Techniques provides a special multi-drop serial cable which allows you to easily connect two or more drives.

Figure 31: Multi-Drop Wiring Diagram

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