Siemens Simatic CFU Commissioning Manual page 94

Diagnostics of the CFU
9.2 Diagnostics via LED displays
LED displays on the BusAdapter
Table 9-3 Status display "LK1" and "LK2" on the BusAdapter
LEDs "LK1" and
"LK2"
There is an Ethernet connection between the PRO‐
FINET IO interface of the CFU and a communication
ON
partner (for example IO controller).
Off There is no Ethernet connection between the PRO‐
FINET IO interface of the CFU and a communication
partner (for example IO controller).
LED display on channel (DIQ<n>)
Table 9-4 Area: DIQ
ER/MT (error/main‐
tenance)
Off
Off
Flashes
Flashes
LED display on fieldbus connection (FB<n>)
Table 9-5 Area: Fieldbus
ER/MT (error/main‐
tenance)
Off
Off
Off
94
Meaning
DIQ<n> - LED Maintenance
Good status (signal
on)
On
Off Good status (signal
off)
Interrupt
Flashes
* Interrupt
FB<n> - LED Maintenance
Good status: Device
connected and
On
ready for operation
Off Good status: No de‐
vice connected and
configured
-
Flashes
-
Check whether the bus cable to the switch/IO
controller is interrupted.
Message
-
-
● Wire break
● Short-circuit to L+
● Short-circuit to M
● Temperature rise
● Missing load voltage
Message
Startup phase of the field device
Commissioning Manual, 07/2018, A5E39252870-AC
Solution
SIMATIC CFU