Woodward MicroNet Simplex - Page 69

Manual 26166V1 MicroNet Simplex & MicroNet Plus
Woodward 67
LED Name Description
FAULT
CPU FAULT (RED)—Actively flashes CPU
fault codes as necessary.
WATCHDOG
CPU Watchdog / Health Faults (RED)—The
processor watchdog or Health monitor has
tripped and the CPU or Remote RTN module
is prevented from running. The CPU
Watchdog includes a 1 ms failover event and
an 18 ms timeout event. Health faults include
GAP fault, Watchdog events, and local
SYSCLK and MFT hardware faults.
CAN LED’s
#2#1
GR
RD
GR
RD
CAN #1, #2
CAN #1, #2 (GREEN/RED)—Active GREEN
or RED when data is transmitted or received
through CAN port #1 or #2.
6.3.4—Module Reset
Front Panel Reset Switch
The CPU module has a pushbutton reset switch on the front panel to reset the module. If a GAP
application was successfully running at the time of reset, the same application will be auto-started and re-
initialized.
CPU1 and CPU2 Remote Reset
Each CPU module will respond to a +24 V remote reset signal. The chassis provides a terminal-block with
inputs RST1+, RST1–, RST2+, and RST2– for wiring the remote reset signals to each CPU. Each reset
signal is routed to an opto-isolated input on the appropriate CPU that requires a +24 V signal to cause a
reset.
CPU1 and CPU2 Remote Reset
Each CPU module will respond to a +24 V remote reset signal. The chassis provides a terminal-block with
inputs RST1+, RST1–, RST2+, and RST2– for wiring the remote reset signals to each CPU. Each reset
signal is routed to an opto-isolated input on the appropriate CPU that requires a +24 V signal to cause a
reset.
Reset Notes:
 Resetting a CPU or Remote RTN module creates a HealthFault that immediately sets the WDOG light
RED.
 Any System running with one healthy CPU. Reset detection will also drive IOLOCK and IORESET to
place the Control System, its expansion racks, and all output signals into a known failsafe condition.
 Redundant Systems running with two healthy CPU's. Reset detection on the SYSCON (System
Controller) causes an immediate "Failover" to the other STANDBY CPU who then becomes the new
System Controller. Reset detection on the STANDBY unit causes a HealthFault that removes it from
STANDBY mode.
 The front-panel RUN/RESET led will be RED while reset is held and will turn GREEN for a few seconds
after releasing reset. After turning OFF, it will again turn GREEN when the operating system starts to
boot.
BEFORE REMOVAL
!
RESET
MODULE
This module should be reset immediately before removing it from the
chassis. This notifies the module that it will be removed and provides
a graceful failover to another healthy CPU module if available.
Released