Schneider Electric 840 USE 106 0 IEC compliant languages FBD, LD, SFC, IL and ST, Hsby system

Overview of Quantum Hot Standby

IEC HSBY

IEC HSBY	IEC Hot Standby means: Programming an application with the choice of 5 different
Architecture	IEC compliant languages; FBD, LD, SFC, IL and ST.
	1.	The IEC HSBY system uses the same hardware architectures as 984 HSBY
		system for its basic operations. For example, state RAM data transfer and
		switchover control are the same, but there are some differences compared to the
		984 HSBY system.
	2.	PLC firmware upgrade is allowed without shutting down the system with Concept
		2.5 or higher. Earlier versions of Concept require shutting down the system to
		upgrade PLC firmware.
	3.	RIO is serviced differently.
	4.	With Concept 2.5 or higher, it is now possible to download the same application
		to Primary and to the Standby controller. The result is that the Hot Standby
		system will be fully setup (equalized) with identical applications in both
		controllers. Earlier versions of Concept require you to use the UPDATE bush
		button (refer to Using a Quantum IEC Hot Standby System , p. 109) on the CHS
		module in the Standby rack to equalize both controllers. Therefore, the same
		application including the configuration will be running in both controllers.
	5.	There’s no CHS function block used in IEC.

28 840 USE 106 00 January 2003