GE 90-70 manual Contents

Contents

Port 2	2-5
Port 3	2-5

Redundancy Communications Module	2-6
Unit Select Pushbutton	2-6
Connector	2-7
RCM Status LEDS	2-7

	Bus Transmitter Module	2-8
	Connectors	2-8
	Bus Transmitter Module Status LEDs	2-8
	Bus Receiver Module	2-9
	Connectors	2-9
	Cables and Termination	2-9
	Genius Bus Controller	2-10
	Location of GBCs and Blocks	2-10
	Single Bus Genius Networks	2-11
	Dual Bus Genius Networks	2-11
	Connectors	2-12
	Bus Controller LEDs	2-12
Chapter 3	Configuration Requirements	3-1
	Programmer Connection for Configuration	3-1
	One Application Program in Both PLCs	3-1
	Program Folders in Control Programming Software	3-1
	Program Folders in Logicmaster 90	3-2
	CPU Configuration Parameters	3-2
	Configuring Shared I/O References	3-3
	Finding the Memory Available for Application Program Storage	3-4
	System Communications Window Considerations	3-4
	Configuring the Redundancy CPU for Non-redundant Operation	3-5
	Rack Module Configuration Parameters	3-5
	Bus Controller Configuration Parameters	3-5
	Genius I/O Block Configuration Parameters	3-6
Chapter 4	Normal Operation	4-1
	Powerup of a Redundant CPU	4-2
	Incompatible Configurations	4-3
	Resynchronization of a Redundant CPU	4-3
	GHS Control Strategy	4-4
	GDB Control Strategy	4-4
	%S References for CPU Redundancy	4-5
	OVR_PRE %S Reference Not Available	4-5
	Scan Synchronization	4-6
	Input Data and Synchronization Data Transfer to the Backup Unit	4-6
	Sweep Time Synchronization	4-6
	Output Data Transfer to the Backup Unit	4-7
	Data Transfer Time	4-8

vi Series 90™-70 Enhanced Hot Standby CPU Redundancy User's Guide–May 2000 GFK-1527A