Advantech I/O Module 5000 Series Uživatelský manuál stáhnout pdf (Strana 11)

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Serial Communication

Cards

Device Servers &

Gateways

Industrial Ethernet

Industrial Monitors

Automation Panel PCs

Operator Panels

Building Automation

Systems

Energy Automation

Hazardous Location

Motion Control

Embedded Auto.

Computers

PACs

M2M I/O

Distributed Nano

Controllers

RS-485 I/O

Automation Software

Ethernet I/O

DAQ Boards

APAX-6572R

APAX I/O

APAX-5002 APAX-5001

Database Sharing

Redundant

I/O Interface

Redundant

I/O Interface

[Backplane]

I/O

APAX I/O

APAX-5002 APAX-5001

[Backplane]

I/O

Power CPU Power CPU

APAX

5097

Redundancy Function

Introduction

Advantech's PAC redundancy solution is implemented in the APAX-6572R controller with ProConOS real time OS under WinCE OS environment. The hardware of the APAX-6572R

includes a power supply module, CPU module, and redundant database module with ﬁber optic communication port to synchronize the database and variables between two controllers

and a backplane. Fiber optic cable is an ideal communication media as it avoids communication noise and extends the connection distance between devices. The redundant controller

APAX-6572R is a hot standby redundant system with a fast switch-over time of less than 150ms when the primary controller fails and switches control functions to a secondary

controller. To ensure the switch-over time in control function, ProConOS implements trigger signal and database synchronization function which executes heart-beat checking and

two times database synchronization in the IEC program.

APAX-6572R Redundancy Hardware System Architecture

Advantech's redundant solution is used on the APAX-6572 PAC controller, it has two independent control platforms for the CPU module, power supply, I/O communication, upstream

Ethernet and redundant database module. The secondary controller takes over the control responsibility when primary controller fails or crashes.

At the beginning of primary controller, the real I/O data, internal register and I/O state table are transferred to the hot standby secondary controller across a high-speed ﬁber optic

communication link. In the event of a primary controller failure, the standby controller takes control of the system with up-to-date I/O and register status information for a bumpless,

controlled transfer with minimal process impact. Critical processes which can’t tolerate any disruption of control are assured a fast, smooth switch over.

ProConOS Operating Process: Refresh Project

APAX Redundancy System Features

 A fast database synchronization module in each controller system improves

reliability by eliminating the need for an intermediate supervisor controller

 Longer distance installation of two controllers through ﬁber optic cable using

the database synchronization module

 System control transfers occur in one program execution to increase system

uptime

 Integrity of the user programs are veriﬁed in both controllers to ensure high

security

 High-speed ﬁber optic communication links between controllers minimizes

scan impact and improves productivity

 Conﬁgurable Primary State Table transfers to the standby controller provides

up-to-date system integrity

 Online primary-to-standby program transfer minimizes the amount of time that

the standby controller is out of service

 Supports two Modbus/TCP Ethernet ports allowing client computer

communications to either controller with no custom communication drivers

 IEC 61131-3 programming language support for high availability hot standby

systems

 Fast switching time of less than 150ms from preliminary to secondary

controller

 All output value maintains current value when switching-over period

 Supports APAX local I/O series modules, up to 32 I/O modules

 Independent I/O communication cable to I/O modules

 Supports system self test and system failure functions for easy maintenance

client computer

 Supports online debugging , analysis and repair

 I/O hot swap replacement & installation

Synchronization I

1. Synchronization: Secondary CPU waits on Primary CPU

2. Check life signal

3. Primary CPU sends input data.

Secondary CPU receives data and writes to process image

Synchronization II

1. Synchronization: Secondary CPU waits on Primary CPU

2. Check life signal

3. Compare output data between Primary and Secondary CPU

Note:

The redundancy function will stop when:

1. Download or download change is executed

2. Debug mode reaches a breakpoint

3. One PAC stops

4. One PAC fails

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