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Equipment Description
33003405 07/2007 45
LED Description The following table describes behaviors of the LEDs:
LED Color Status Meaning
Relay Contact
Outputs 1-8
Orange On An Output signal is being sent.
24 VDC Green On 24 V DC operating voltage present
Not illuminated Off No operating voltage
RUN Green On Normal state of PES (RUN) A loader user program is executed (not in
remote I/O modules). The CPU reads inputs, processes the logic, and
writes outputs; communication and hardware/software tests are
carried out.
Green Flash The CPU is in STOP and is not executing any user program. All outputs
are reset to a safe de-energized state. STOP can be triggered by
setting the Emergency stop system variable to TRUE in the user
program or by a direct command from the PC. Seen when PLC is
switched on for approximately 10s during the system check.
Not illuminated Off The CPU in ERROR STOP (see ERROR below).
ERROR Red On The CPU has discovered a hardware fault in the CPU and is switching
to ERROR STOP. The CPU has discovered a software error in the
operating system. The watchdog has triggered ERROR STOP,
because the cycle time has been exceeded. The CPU has stopped the
execution of the user program, ended all hardware and software tests,
and all outputs have been reset. The CPU can only be started again
through a command from the PC.
Not illuminated Off No error has been detected.
PROG Orange On The CPU is being loaded with a new configuration.
Orange Flash The Flash ROM is being loaded with a new operating system.
Not illuminated Off No loading of configuration or operating system.
FORCE Not illuminated Off FORCE is not signalled.
Orange On Forcing active.
FAULT Orange On Error display for Line Control. The user program has caused an error.
The PES configuration is faulty. The loading of a new operating system
was faulty, and the operating system is corrupt.
Orange Flash An error has occured during the write cycle for a Flash ROM (during
the oprating system update). One or more I/O errors have occured.
Not illuminated Off None of the above errors has occured.
OSL Orange Flash Emergency loader of the operating system is active.
BL Orange Flash COM in
INIT_FAIL state.