LED Descriptions
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PC Cards cifX Compact PCI, Mini PCI, Mini PCIe, PCI-104 | Installation, Operation and Hardware Description
DOC120205UM53EN | Revision 53 | English | 2019-03 | Released | Public
© Hilscher, 2008-2019
8.20 PROFIBUS DP Slave
8.20.1 1 Communication Status LED
For the PROFIBUS DP Slave protocol, the communication status LED
COM
can assume the states described below. This description is valid from
stack version V2.7.
LED
Color
State
Meaning
cifX with 1 Communication Status LED
(current Hardware Revision)
Duo LED red/green
(green)
On
RUN, cyclic communication
(green)
Flashing,
cyclic (2 Hz)
Master is in CLEAR state.
(red)
Flashing,
acyclic (1 Hz)
Device is not configured.
(red)
Flashing,
cyclic (2 Hz)
STOP, no communication, connection error
(red)
On
Wrong configuration at PROFIBUS DP Slave.
COM
(off)
Off
Device is not switched on or power is missing.
During firmware download process.
Table 85: LED states for the PROFIBUS DP Slave protocol – 1 Communication Status LED
(current Hardware Revision)
LED State
Definition
Flashing,
acyclic (1 Hz)
The indicator turns on and off in irregular intervals, with a frequency
of 1 Hz: “on” for 750 ms, followed by “off” for 250 ms.
Flashing,
cyclic (2 Hz)
The indicator turns on and off with a frequency of 2 Hz:
“on” for 250 ms, followed by “off” for 250 ms.
Table 86: LED state definitions for the PROFIBUS DP Slave protocol
