ABB Bailey 6637826B1 AC TraNSmission module

ABB Bailey 6637826B1 AC TraNSmission module Description:

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Description

The rich function block library includes several types of control loops, including advanced control and auto- tune capabilities as well as integration for ABB drives and motors. The controller communication by means of Ethernet includes on board RNRP redundancy along with a broad set of communication modules to connect to third-party devices. A superior redundancy concept allows for fast switch-over times and topologically separated CPU-modules. Several CPU modules are available, varying in terms of processing power, memory size and redundancy support. Priority controlled, time-based tasks allow the highest stability in even complex control tasks

AC 800M controller

A Programmable Automation Controller, designed to achieve high availability for control applications in the process industry.

Article no.: 3BSE003645R1

Product category: PLCs - ABB - Advant Controller 410 - ABB 3BSE003645R1 PM154 (3BSE003645R1) All used units are powered up and tested as far as we have knowledge to. We are unable to fully test some advanced units, but most is fully tested.

Benefits

• Full modularity and flexibility for all environments for future expansion of control applications
• Compact Control Builder software offers a wide range of powerful control solutions and reusable libraries for efficient configuration
• Robust design and redundancy options in all critical areas of the controller and its components eliminates single-point failures and secures maximum availability
• Supports a broad range of I/O products that can be integrated into a spectrum of industrial processing applications

mailto:unity@mvme.cn

ABB Bailey 6637826B1 AC TraNSmission module 

ABB Bailey 6637826B1 AC TraNSmission module 

ABB Bailey 6637826B1 AC TraNSmission module 

Now lets talk about the longest case scenario that leads up to a switchover.  Assume the Active App CIU dies.  The Bailey interface communication logic does 3 retries on failed messages with 7 second time out for each retry.  The timeout length is based on the worse case theoretical maximum time it could take for the Bailey CIU to response to a poll class message which is 6 seconds.  Without getting into too much Bailey CIU communication theory, let’s just say that the DVCBailey interface uses a mechanism called keyed messages for the poll class messages that can take up to 6 seconds to reply.  This mechanism allows those types of messages to be keyed which means the CIU is working on getting their reply while it is free to process other messages such as the exception report reads.  So if the CIU dies, it will take 21 seconds (three retries at 7 seconds each) for the interface to declare the CIU dead and force a switchover.  At that point the switchover happens really fast (less then 1 second).  When uniquely addressed CIUs are being used, the data from the former standby App begins to flow immediately after the switchover occurs.  When same address CIUs are being used, there will be a small delay (less than 5 seconds) after switchover before the data begins to flow again. 

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