Grasso
Refri
eration Division
GRASSO SYSTEM CONTROL
01.2003/ 0 638660E_chapter7.doc Kap.7 - 7
7.3.2 Profibus DP/DP-coupler
Figure 1: Profibus DP/DP-coupler
The LEDs on the front side of the DP/DP coupler have the following meaning:
24 Volt
(green)
Error
(red)
DP1
(green)
DP2
(green)
Meaning
No 24V supply voltage
24V supply is applied and is OK
Device is running; operation possible.
The device is still in the initialisation phase.
Grave error in device (exchange HW if necessary).
Operation is not possible.
No messages are running on Network 1
Messages are running on the PROFIBUS DP Network 1
(w/o fault)
No messages are running on Network 2
Messages are running on PROFIBUS DP Network 2
(w/o fault)
LED off
LED on
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