User Manual

4.6 Indications and Switches
4.6.1 Light-Emitting Diodes (LEDs)
The SAPHIR unit is equipped with four LEDs for optical status indication.
The LEDs are controlled via an external port that is addressed by the microcontroller's
chip select signal (CS2).
LED name LED color Port
CTRL (LED1) Green Bit 0
FAULT (LED2) Red Bit 2
COM (LED3) Green Bit 4
OK (LED4) Green Bit 7
Indication meanings:
The functionality of the LEDs is briefly described here.
– Individual ACX32
Application with an ACX32 with no communication card (RCC) installed.
Operating state LED indication
Normal status CTRL flashes green
OK flashes green at high frequency
FAULT is off
COM is off
Task stopped CTRL is off
OK flashes green at high frequency
FAULT is permanently red
COM is off
– ACX32 maste
r
Master-slave application with a communication card (RCC) installed.
LED Operating state
CTRL
Application program running:
If the application is running properly, the LED changes its status at every
cycle. This means high to very high frequency flashing with small
applications, and low-frequency flashing with large applications.
FAULT
Only on if an error is present:
• If FAULT is on, and CTRL and OK are flashing, there is a hardware fault
in the I/O peripherals.
• If FAULT is on, and OK is not flashing, there is a problem with the entire
controller.
Please inform Support of the LED status!
COM
Communication active:
Only if an RCC card is installed, this LED flashes during message traffic.
OK
Controller operational:
Controller life sign; must flash rapidly
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Siemens Building Technologies Hardware Description CE2P3689en
HVAC Products Hardware 25.11.2004