Manual 26166V1 MicroNet Simplex & MicroNet Plus
Woodward 78
7.1.4—Front Panel Indicators (LEDs)
The Real Time Network (RTN) module has the following front-panel LED's.
Table 7-2. Remote RTN Module Front Panel LED’s
LED Name Description
RUN
GR
RD
RUN
RUN / RESET (GREEN/RED)—Active RED when the user
pushes the reset switch. Active GREEN upon release and after
the CPU Operating system is loaded and running.
TX/RX
TX/RX (GREEN)—Active GREEN when data is transmitted or
received.
LINK
LINK ACTIVE (YELLOW)—A valid Ethernet connection to
another device exists
STA
IOLO
WDO
SYSCON
LVCC
FAULT
GR
RD
RD
YL
RD
RD
SYSCON
System Controller (GREEN)—Active when this CPU or Remote
RTN module is the VMEbus System Controller.
STANDBY
Standby Ready (YELLOW)—Active when the STANDBY mode of
this CPU or Remote RTN module is ready to release or take over
the System Controller functions in a failover event.
LVCC
Low VCC Power Fault (RED)—A CPU or VME power supply high
or low tolerance fault has been detected.
- Local CPU power faults could be 1.2 V, 1.5 V, 1.8 V, 2.5 V, or
3.3 V.
- VME power faults could be VME_5V, VME_5VPC, or
VME_24V.
IOLOCK
IOLOCK (RED)—This LED indicates that an I/O LOCK condition
exists either locally on the CPU itself and/or on the VMEbus.
Note: IOLOCK is a condition driven by the SYSCON where all
I/O modules are placed into a failsafe condition and outputs are
driven to a known state.
FAULT
CPU FAULT (RED)—Actively flashes CPU fault codes as
necessary.
WATCHD
OG
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.
7.1.5—Module Reset
Front Panel Reset Switch
The Remote RTN module incorporates a pushbutton reset switch on the front panel to reset the module.
This module will NOT automatically re-initialize to a running state after reset. The main-chassis CPU
application can re-init this module upon request.
RTN1 and RTN2 Remote Reset
Each Remote RTN 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 RTN.
Each reset signal is routed to an opto-isolated input on the appropriate RTN 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 Expansion chassis running with one healthy RTN. Reset detection will also drive IOLOCK and
IORESET to place the expansion rack and all output signals into a known failsafe condition.
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