CPU ADAM 821x
Chapter 2 Hardware description
ADAM 8000 Manual CPU 821x – Rev 1.1
2-13
In addition to the components described in the section on the CPU 821x the
CPU 821xDPM module is provided with 4 more LEDs and a Profibus
interface.
The LEDs are located in the left half of the front panel and they are used for
diagnostic purposes. The following table shows the color and the
significance of these LEDs.
Name
Color
Description
RN
green If RN is the only LED that is on, then the master
status is RUN. The slaves are being accessed and
the outputs are 0 ("clear" state).
If both RN+DE are on the status of the Master is
"operate". It is communicating with the slaves.
IF
red
Initialization error for bad Profibus configurations
DE
yellow DE (Data exchange) indicates Profibus
communication activity.
ER
red
On when a slave has failed (ERROR).
The CPU 821xDPM is connected to the Profibus system by means of a
9pin socket. The pin assignment of this interface is as shown:
9pin Profibus D-type socket:
Pin
Assignment
1 Screen
2 not
used
3 RxD/TxD-P
4 CNTR-P
5 GND
6
5V (max. 70mA)
7 not
used
8 RxD/TxD-N
9 not
used
Note!
Refer to the chapter "Deployment of the CPU 821xDPM" for details on the
Profibus master.
CPU 821xDPM
LEDs
Profibus interface
5
4
3
2
1
9
8
7
6
