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
8.21 PROFIBUS MPI Device
8.21.1 1 Communication Status LED
For the PROFIBUS MPI protocol, the communication status LED
COM
can
assume the states described below. This description is valid from stack
version V2.4.
LED
Color
State
Meaning
cifX with 1 Communication Status LED
Duo LED red/green
(green)
On
Status:
The device currently holds the PROFIBUS token and is
able to transfer telegrams of data.
(green)
Blinking (5 Hz)
Status:
The device is configured to be a part of the PROFIBUS
ring, but it must share the PROFIBUS token with other PROFIBUS-
Master devices present on the PROFIBUS ring.
(green)
Blinking (0.5 Hz)
Status:
Automatic baudrate detection is running
COM
(off)
Off
Status
: The device has not been integrated into the PROFIBUS
ring, i.e. it has not been configured correctly or has a wrong
configuration or has not received the PROFIBUS token.
Table 89: LED states for the PROFIBUS MPI protocol – 1 Communication Status LED
LED State
Definition
Blinking (5 Hz)
The indicator turns on and off with a frequency of appr. 5 Hz:
“on” for appr. 100 ms, followed by “off” for appr. 100 ms.
Blinking (0.5 Hz)
The indicator turns on and off with a frequency of appr. 0.5 Hz:
“on” for appr. 1000 ms, followed by “off” for appr. 1000 ms.
Table 90: LED state definitions for the PROFIBUS MPI protocol
