GuardPLC™ 1600 Controllers
17
Publication 1753-IN001B-EN-P - March 2004
Communication Display
Communication via GuardPLC Ethernet is indicated by two small LEDs integrated
into all connecting sockets.
Additional non-safety related communication occurs on the field buses and is
indicated by the LEDs.
FAULT
On
•
The routine (logic) has caused an error.
•
The controller configuration is faulty.
•
The upload of a new operating system was not successful and the operating
system is corrupted.
Flashing
An error has occurred during a Flash ROM write cycle.
One or more I/O errors have occurred.
Off
None of the above errors has occurred.
OSL
Flashing
Emergency
O
perating
S
ystem
L
oader is active.
BL
Flashing
B
oot
L
oader unable to load operating system or unable to start COMM operating
system loader.
Controller status can be interrogated through the programming software. For more information, refer to the
GuardPLC™ System User Manual
(1753-UM001).
LED
Status
Condition
Green
On
Full-duplex operation
Flashing
Collision
Off
Half-duplex operation, no collision
Yellow
On
Connection established
Flashing
Interface activity
LED
Connection
Condition
Green
COMM 1
RS485 interface, field bus active
COMM 2
Unassigned
COMM 3
Unassigned
Indicator
State
Condition
