Schneider Electric Modbus Plus Network Bridge Multiplexer none Spécifications télécharger pdf (Page 36)

Section 1—Installation & Configuration Bulletin No. VVDED397044US R12/00

Parameter Setup December 2000

Example of MODBUS PLUS Network Operation

Figure 24 illustrates a typical MODBUS PLUS network with two

ALTIVAR 58 drive controllers as nodes. The figure illustrates that a single

node controls the drive controller by implicit reservation of the command

semaphore.

Figure 24: MODBUS PLUS Network Operation

Specific transfer with

peer cop enabled in

the ALTIVAR 58 drive

controller creates a

command node

(Node 1).

Modicon PLC

Node 1

HMI

Node 2

Node 4

Node 5

Global Data

HMI sends

messages

to read

data from

drive

controller 1

Specific transfer from

node 3 to node 5 is

ignored by drive

controller 2 since it has

peer cop reception

disabled. Specific

transfer from node 3 to

node 4 is ignored by drive

controller 2 since its

designated control node

is node 1. Node 3 can

send messages using

MSTR blocks to node 5.

Modicon

PLC Node 3

Node 6 on

MODBUS PLUS

Network 1

Bridge

Node 3

MODBUS PLUS

Network 2

Node 1

MODBUS PLUS

Network 1

Node 2Node 5Node 4

Peer cop node = Yes

Command node = 1

Drive 1 Drive 2

Peer cop

node = No

1 2 ... 31 32 33 34 35 36 37 38 39 40 41 ... 59 60

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Schneider Electric Modbus Plus Network Bridge Multiplexer none Spécifications Page 36

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