BSH0552P11A1A SCHNEIDER

It is very difficult to optimize the dead time due to the great diversity of load on a system. However, it is possible to study each type of load separately and thereby be able to define a typical dead time.

Description:

Application 

Software Setup

Setting-up a Hot Standby application requires configuring four dialogs, and 

configuring must occur during the initial setup. 

Schneider Electric recommends

Non-Transfer 

Area

A "Non Transfer Area" may be specified by means of a starting %MW reference field 

and a length field.

This "Non-Transfer Area" defines a portion of the output registers’ (%MW) State 

RAM. This defined portion (the referenced positions of data memory) will not be 

transferred from Primary to Standby at each scan cycle.

A null start value is an illegal entry, as %MW0 does not exist on Quantum.

Option Set Description

Run Mode Online for Controller A 

and B

After the project download, controllers A and 

B are coupled together, therefore, building 

an effective redundant system.

Invalidate Keypad Check box NOT 

checked

Control the redundant state through both the 

Control Register bit and keypad entries.

Stand By on Logic 

Mismatch

Online The redundant system acts as a Primary / 

Standby system, even if a modification was 

made to one of the controllers’ project.

Swap Address At 

Switchover

Modbus Port 1

Check box checked A 128 offset is added to the Standby unit's 

slave Modbus port address.

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