Schneider Electric 840 USE 106 0 manual Updating PLC System Executives in an IEC Hsby System

Maintenance

Updating PLC System Executives in an IEC HSBY System

Updating PLC	In a Pre Concept 2.5 IEC Hot Standby System it’s not possible to update the PLC
System	system executives without shutting down the process. Instead you must follow the
Executives	steps in the table below.
	Concept 2.5 IEC Hot Standby System allows the upgrading of the controllers
	executives without shutting down the system. See Advanced Options, Section
	B122.
		CAUTION
		Executing the Steps Hazard

Quantum IEC Hot

Standby

Controller Exec

Upgrade

Procedure

Following the procedural steps in order is critical for the safety and reliability of your Hot Standby system.

Failure to follow this precaution can result in injury or equipment damage.

The following table shows the steps in a Quantum IEC Hot Standby Controller Exec Upgrade Procedure.

Step	Action
1	Stop the process being controlled.
2	Stop both controllers.
3	Load the new Execs in both controllers.
4	Download the project to the primary controller. Note: Some Exec upgrades may
	be because of new versions of Concept and in certain cases the project may
	have to be converted before downloading. Note: The Primary controller must be
	started.
5	Load the project into the Standby Controller via the fiber optic CHS link in
	Transfer mode.
6	Start the Standby Controller. Note: You can do this by using the CHS fiber optic
	update procedure, without using Concept.
	Result: The IEC Hot Standby System will now come up and run in Normal
	Recommended Operation.

200 840 USE 106 00 January 2003