Emerson FM-3 Spécifications télécharger pdf (Page 50)

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.

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 32: EN Multi-Drop Wiring Diagram

Serial Communications Specifications

Max baud rate 19.2k

Start bit 1

Stop bit 2

Parity none

Data 8

Note:

The terminating resistor packs, TERM-H

and TERM-T, should be installed on the

first (TERM-H) and last (TERM-T) drive in

the string if the total cable length is over

50 feet.

TIA-XXX

Serial Cable

TERM-H

TERM-T

DDS-XXX

Serial Cables

DDS-XXX

Serial Cables

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Emerson FM-3 Spécifications Page 50