
28
Manual – Controllers DHE/DHF/DHR21B (standard) and DHE/DHF/DHR41B (advanced)
4
Installing the DH.21B/41B option
Assembly and Installation Notes
LED L2
(CAN 2 state)
LED
L2
indicates the
state
of the
CAN 2
system bus.
LED L3
(IEC program
state)
LED
L3
indicates the
state
of the
IEC-61131 control program
.
LED L4
(controller state)
LED
L4
indicates the
firmware state
of the DH.21B/41B option.
LED L5 (User)
LED
L5
is freely programmable in the IEC program.
State of the L2 LED
Diagnostics
Remedy
Orange
The CAN 2 system bus is being
initialized.
-
Green
The CAN 2 system bus is being
initialized.
-
Flashing green
(0.5 Hz)
The CAN 2 system bus is currently in
SCOM suspend mode.
-
Flashing green
(1 Hz)
The CAN 2 system bus is currently in
SCOM On mode.
-
Red
The CAN 2 system bus is off
(BUS-OFF).
1.
Check and correct the cabling of the
CAN 2 system bus.
2.
Check and correct the baud rate set
for the CAN 2 system bus.
3.
Check and correct the terminating
resistors of the CAN 2 system bus.
Flashing red
(1 Hz)
Warning on the CAN 2 system bus.
1.
Check and correct the cabling of the
CAN 2 system bus.
2.
Check and correct the baud rate set
for the CAN 2 system bus.
State of L3
Diagnostics
Remedy
Green
IEC program is running.
-
Off
No program is loaded.
Load the program into the controller.
Flashing orange
(1 Hz)
Program has stopped.
Bootloader update required (see chapter "SD
memory card type OMH41B-T".)
State of the L4 LED
Diagnostics
Remedy
Flashing green
(1 Hz)
The firmware of option DH.21B/41B is
working properly.
-
Red
•
No SD card inserted.
•
File system of the SD card is
corrupt.
Flashing orange
(1 Hz)
Program has stopped.
Bootloader update required (see chapter
"SD memory card types OMH41B-T. and
OMC41B-T.")
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