3 function with rs-485 master, Message structure, Function with rs-485 master – Metalfab SEW Eurodrive MOVIMOT MM..C User Manual

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Operating Instructions – MOVIMOT® MM03C - MM3XC

9

Function with RS-485 master

Startup with Communications Interface / Fieldbus

9.3

Function with RS-485 master

The controller (e.g. PLC) is master, MOVIMOT

®

is slave.

1 start bit, 1 stop bit and 1 parity bit (even parity) are used.

The transmission adheres to SEW MOVILINK

®

protocol (see the section

MOVILINK

®

Unit Profile with a Fixed Transmission Rate of 9,600 Baud).

Message struc-
ture

Idle

= Start pause at least 3.44 ms

SD1 = Start delimiter (start character) 1: Master

MOVIMOT: 02

hex

SD2 = Start delimiter (start character) 2: MOVIMOT

Master: 1D

hex

ADR = Address 1–15

Group address 101–115

254 = Point-to-point

255 = Broadcast

TYPE = User data type

PDU = User data

BCC = Block check character: XOR of all bytes

02754AEN

In the 'cyclical' type, MOVIMOT

®

expects the next bus activity (master protocol) with-

in one second at most. If this bus activity is not detected, MOVIMOT

®

automatically

decelerates to a standstill (timeout monitoring).

There is no timeout monitoring for the 'acyclical' type.

0

0

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