PCL
Pleiger Elektronik GmbH & Co. KG
www.pleigerelektronik.de
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Pleiger Control Loop
Manual version 2018-03
9.2 Display elements and interfaces of the mc3 processor board
The mc3 processor board has four LED indicators.
Position
Color
Status
Description
1. LED
Red
OFF
No error, or error acknowledged by SCADA sys-
tem
ON
Global error. Not yet acknowledged by SCADA
system
2. LED
Green
Blinking (1Hz)
Normal operation
3. LED
Yellow
ON
CAN bus not connected (open)
OFF
CAN bus off (short circuit)
Flashing
CAN sending data
4. LED
Green
ON
CAN bus not connected (open)
OFF
CAN bus off (short circuit)
Flashing
CAN receiving data
Table 9-2: Busmaster Status LEDs from top to bottom
Ethernet LAN port (used to connect local operation terminals with
the master)
CAN-High
CAN-Low
Status-LED: on = failure
Status-LED: flashing 1Hz = normal operation
CAN-LED: receive
CAN-LED: send
CAN Bus (used for redundant master to master communication)
micro USB port (used for firmware update u. commissioning tools)
CAN Bus termination (here
always „ON“!)
RESET button
µSD card slot
on
off
PE
Activity LED: steady = connected, blinking = transferring data
Speed LED: on = 100 Mbps connection, off = 10 Mbps connection
Figure 9-2: mc3 processor board