Installation manual

4/38
4
4.3
Presentation,
description
Modicon TSX Micro
automation platform 0
Modbus Bus
The Modbus bus is used for master/slave architectures (it is necessary, however,
to check that the Modbus services used by the application are implemented on the
devices concerned).
The bus comprises one master station and several slave stations. Only the master
station can initiate the exchange (direct communication between slave stations is not
possible). Two exchange mechanisms are possible:
b Question/answer, where the requests from the master are addressed to a given
slave. The master then waits for the response from the slave which has been
interrogated.
b Broadcasting, the master broadcasts a message to all the slave stations on the
bus. These stations execute the order without transmitting a response.
The TSX Micro/Premium PLCs or Atrium coprocessors offer various Modbus bus
connection possibilities.
1 Via integrated port on the TSX Micro processor.
The TER port (8-way mini DIN) has Modbus RTU master/slave (1) protocol.
2 Via integrated port on the TSX SCY 11601/21601 module for Premium PLCs.
This module has an isolated Half-duplex RS 485 serial link channel (25-way SUB-D
connector) with multiprotocol (including Modbus); (for the TSX SCY 11601
module, only the Modbus protocol is supported).
3 A slot on the TSX Micro/Premium processors, the Atrium coprocessor and the
TSX SCY 21601 module(2) exists for the multiprotocol TSX SCP11p cards,
including Modbus, featuring:
4 A protective cover.
5 A removable cover with fixing screws (to access a 20-way miniature connector).
6 Two LEDs:
v ERR lamp: card or link fault,
v COM lamp: data transmission or reception.
Cable connector to be ordered separately: TSX SCP/SCY cable.
(1) Modbus RTU slave Protocol with TSX 37 05/08.
(2) This slot is also designed for Fipway TSX FPP 20 or Jnet TSX JNP 112/114 PCMCIA network
cards.
Presentation
Magelis iPC
Modbus
TSX Micro/Premium
April 5000
XBT
Quantum
ATV 58
Description
Built-in links to the TSX Micro processor or to the TSX SCY p1601 Premium
module
3
2
6
54
6
5
4
1
3
P
remium
T
SX Micro
TSX SCY 21601
TSX SCY 11601
TSX SCP 11 multiprotocol PCMCIA cardsp
R
eferences:
p
ages 4/40 and 4/41
Courtesy of Steven Engineering, Inc. ● 230 Ryan Way, South San Francisco, CA 94080-6370 ● General Inquiries: [phone] ● www.stevenengineering.com
efesotomasyon - telemecanique inverter