Woodward Standard MicroNet+ KitSpeed Combo Module 8262-3183

The MicroNet Plus and MicroNet Simplex controls are 32-bit microprocessor-based digital controllers that

are programmable for many types of applications in the control of:

• Gas and Steam Turbines

• Gas and Diesel Engines

• Hydro Turbines

The MicroNet Controls family provide a flexible system to control any prime mover and its associated

processes such as high speed control functions, system sequencing, auxiliary system control, surge

control, monitoring and alarming, and station control. The MicroNet platform is available in simplex,

redundant, and Triple Modular Redundant (TMR) configurations. This manual covers only simplex and

redundant based control configurations. Please refer to manual 26167 for TMR-based control

configurations.

The MicroNet Operating System, together with Woodward’s Graphical Application Program (GAP),

produces a powerful control environment. Woodward’s unique rate group structure ensures that control

functions will execute deterministically at rate groups defined by the application engineer. Critical control

loops can be processed within five milliseconds. Less critical code is typically assigned to slower rate

groups. The rate group structure prevents the possibility of changing system dynamics by adding

additional code. Control is always deterministic and predictable.

Dedicated inputs and outputs (I/O) are available onboard for key control signals while distributed I/O can

be used for other less critical parameters.

Communications with the MicroNet platform are available to program and service the control as well as to

interface with other systems (Plant DCS, HMI, etc.). Application code is generated by use of Woodward’s

GAP program or Woodward’s Ladder Logic programming environment. A service interface allows the user

to view and tune system variables. Several tools are available to provide this interface (see Engineering

and Service Access). Communication protocols such as TCP/IP, OPC, Modbus, and other current

designs are included so that the user can correctly interface the control to existing or new plant level

systems.

The MicroNet platform is expandable into multiple chassis as required by the system size and will support

any mix of I/O, including networked and distributed I/O. The MicroNet control is available in chassis sizes

with 6. 8. 12. or 14 VME slots. Each has dedicated power supply and control sections located in a single

chassis. The power supply architecture supports simplex or redundant power supplies.

1.2. Specifications and Compatibility

For environmental specifications and MicroNet compatibility information, please refer to the appropriate

appendix in Volume 2 of this manual.

Redundant CPU Theory

Expansion

Rack #2

The MicroNet Plus control system uses redundant CPU5200/CPU5200L modules that must be located in

the first and last VME slots (A1 and A8 / A14). The chassis has a single motherboard and houses 2 power

supplies, 2 CPUs, and 12 I/O slots. The CPUs share a single data path to the VME modules and each

other.

In a redundant system, there are two CPU modules, running the same application program, receiving power from

the same pins on the VME backplane, and with access to the I/O modules over the same VME bus. The CPU

modules communicate their health to each other over the VME bus, and arbitrate for control of the bus. The CPU

which is in slot 1 and in good “health” first, gains control of the I/O modules, and is called the System Controller or

SYSCON. The other CPU is then the backup or STANDBY CPU. The SYSCON sends all necessary state

information to the backup CPU, allowing it to take control of the I/O modules if the SYSCON fails.

The following conditions will cause a failover from the SYSCON CPU to the backup STANDBY CPU:

• Failure of the on board CPU module power supplies

• Failure of the processor core, including the processor, RAM, flash, oscillator, and supporting internal

circuitry.

• A reset of the SYSCON CPU, caused by the front panel or remote Resets

• An application requested failover

• An application stop

Standard MicroNet+ Kit, 8-Slot, 2 120 V AC/DC PS, Relay Drivers, Speed

Combo Module

8262-3183

Standard MicroNet+ Kit, 8-Slot, 2 120 V AC/DC PS, Relay Drivers, Analog

Combo Module

8262-3191

Standard MicroNet+ Kit, 8-Slot, 2 220 VAC PS, Relay Drivers

8262-3184

Standard MicroNet+ Kit, 8-Slot, 2 24 VDC PS, Relay Drivers

8262-3185

Standard MicroNet+ Kit, 8-Slot, 2 120 V AC/DC PS, Relays

8262-3180

Standard MicroNet+ Kit, 8-Slot, 2 220 VAC PS, Relays

8262-3181

Standard MicroNet+ Kit, 8-Slot, 2 24 VDC PS, Relays