Redundancy Options - GE Mark VIe System Manual

1.6 Redundancy Options

The Mark control platform provides scaleable levels of redundancy. The basic system is a single (simplex) controller with
simplex I/O and one network. The dual system has two controllers, singular or fanned TMR I/O and dual networks, which
provides added reliability and online repair options. The TMR system has three controllers, singular or fanned TMR I/O, three
networks, and state voting between controllers providing the maximum fault detection and availability.
1.6.1 Controller Redundancy
Controller redundancy consists of the following:
• Simplex controller
• Dual controllers
• Triple redundant controllers (TMR)
1.6.1.1 Simplex Controller
The simplex control architecture contains one controller connected to an Ethernet interface through the Ethernet network
(IONet). No redundancy is provided and no online repair of critical functions is available. Online replacement of non-critical
I/O (that where the loss of the I/O does not stop the process) is possible.
Each I/O pack delivers an input packet at the beginning of the frame on its primary network. The controller sees the inputs
from the I/O modules, performs application code, and then delivers an output packet(s) for all I/O modules. The following
diagram displays typical simplex controller architecture.
Control System Overview
Controller
R
IONet
Switch
I/O Modules
Simplex Mark VIe Control System
Public Information
GEH-6721_Vol_I_BP System Guide 37