Manual 26166V1 MicroNet Simplex & MicroNet Plus
Woodward 25
Figure 3-5. Redundant Inputs
This process can be expanded for triplicated inputs. With triplicated inputs, redundant inputs are available if
an input fails. It is also possible to determine which input is not valid when using triplicated inputs.
3.1.5—Redundant Outputs
Redundancy can be added to the outputs as well. Additional external relays can be used to prevent a
faulted output from affecting the external device. For discrete outputs, this would require four relays for each
output. For the actuator outputs, a dual coil actuator can be used. The dual coils will allow one coil to
operate the actuator in the event of a failure.
The value of redundancy is dependent on the ability of the application to detect the failure. For analog and
actuator outputs, current and/or voltage read back is provided. For discrete outputs, fault detection requires
sensing the relay contact state.
3.2—MicroNet Simplex Operation
To operate the MicroNet Simplex, the CPU must be in the first user slot (slot A1).
In the GAP application select the MICRONET12 or MICRONET6 chassis type and place an
appropriate CPU in the A1 slot.
The CPU selected can be either the CPU5200, Pentium, or Motorola x040.
Assign communication and I/O modules according to your application needs.
Compile and code your application using the Woodward GAP/Coder tools.
For systems using the CPU5200 or Pentium CPU, use the AppManager Service Tool to load and start
the application over Ethernet.
For systems using the Motorola x040 CPU, the application can be loaded from a PCMCIA memory
card or downloaded over Ethernet using a separate Ethernet module.
After starting the application, the CPU will initialize the I/O and run the real-time application.
System initialization is complete when all the I/O module fault LED's are cleared.
Expansion Chassis Notes:
The GAP application may also define expansion racks by using either the Remote Real Time Network (Remote
RTN) module or the Remote Transceiver (Remote XCVR) module. The expansion method used (Remote RTN
or Remote XCVR) depends on the CPU being used in the main chassis.
CPU5200 based systems require that the expansion chassis use the Remote RTN module in slot A1.
The CPU5200 in the main chassis controls the expansion chassis through its redundant RTN port
connections to the Remote RTN module.
Pentium and Motorola x040 based systems require that the expansion chassis use the Remote XCVR
module in slot A1 of the expansion rack. The system must also have a Main Transceiver (Main XCVR)
module in the main chassis to control the expansion chassis.
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