CTI Janus Programmable Automation Controller IOG
15
2.3
Status Indicator LEDs
LED
Color
State
Indication
CPU GOOD
BLUE
Off
Not operational
–
module initialization failure or no power
Flash
N/A
On
Module hardware/firmware passed all power-on tests and operation
is normal
RUN
BLUE
Off
Application program stopped or not loaded
Flash
Program loaded but logic is not running (
LOGIC STOP
state).
I/O interface and communication protocols are active.
On
Application program is executing (RUN state)
ERROR
YELLOW
Off
No active errors
Flash
Critical error that prevents application from entering RUN mode (Error
Code displayed on front panel)
On
After software boot, indicates active error conditions. These errors
can occur while in RUN mode and will not prevent application from
transferring to RUN mode.
(Error Code displayed on front panel)
On initial power up, this signals that the hardware is powered and
ready for software boot.
2.4
Alphanumeric Display
The Alphanumeric Display is used to display IP parameters (i.e. IP addresses and subnet information) and active
error status information. If desired, the display of IP parameters can be disabled using the embedded web server.
When an error state is active, the corresponding error code is displayed. When multiple error states are active, the
highest priority active error code is displayed. See
for a list of system error
codes and descriptions.
2.5
Battery
A replaceable high-power Lithium Metal Oxide battery provides an auxiliary power source to provide an orderly
system shutdown when DC power from the backplane is lost while the controller is in RUN state. The battery is
accessible through the front panel battery cover and can be replaced while the application is running.
The battery circuit is automatically enabled when the backplane power is removed. After a successful shutdown,
the battery circuit is disabled to preserve battery life. See
Section 3.2.4: Inserting the Battery
regarding battery installation and care.
2.6
Ethernet Communications Ports
The RJ-45 Ethernet ports, labeled
P
ORT
A,
P
ORT
B,
P
ORT
C,
AND
P
ORT
D,
are identical in their operation and usage. For
the Janus Classic controller, all ports are capable of operating at 1000Mb (1Gb) full duplex. For the Janus Compact
controller, Ports A and B are capable of operating at 1000Mb (1Gb) full duplex while ports C and D are capable of
