Pilz PSSu K S RS232 Modbus ASCII Manuel d'utilisateur télécharger pdf (Page 13)

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4-1

4.1 Module features

4 Function description

44000Function descriptionFunction description4-4.1Module features4100Module features4-

4.1.1 Function description

Function description4-][Funktionsbeschreibung BA Einleitung Ser

The module enables communication via a serial interface.

][Funktionsbeschreibung Module Supply

Module supply

 The module supply provides the module with voltage.

][Funktionsbeschreibung_Peri Ser

Periphery supply

 The periphery supply provides the serial interface with voltage.

][Funktionsbeschreibung Datenaustausch Ser

Signal processing

 In each cycle, a max. of 8 Bytes of data can be transferred in both di-

rections between control system and module. The data to be trans-

ferred is stored temporarily in a send and receive buffer.

 Two additional status bytes and control bytes are available in the

process image for data exchange between control system and mod-

ule.

 All the configuration data is stored in the head module and is assigned

to the module on restart. This way the configuration data is retained

even if you change the module.

][Funktionsdiagramm ST RS232 Modbus ASCII

Schematic representation of signal processing with the control system

PSSu PLC/PSSu multi:

4.1.2 Integrated protection mechanisms

Integrated protection mechanisms4-][Schutzmechanismen E/A-Module

When the PSSu E F PS1(-T) is used to supply the system, the module

supply is buffered for 20 ms if the supply voltage is interrupted.

][Schutzmechanismen ST-Module

The module detects the following errors:

 Start-up error

 Configuration error

 ST communication error

 Bus termination error

Ext. device

with serial

interface

RS232

PSSu K S RS232

Modbus ASCII

Head

module

with

control

system

Module

bus

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 ... 30 31

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