Meanings Of "Bf" Led On The Im 308-C Master Interface; Meanings Of The Leds On The Im 308-C Master Interface - Siemens SIMATIC S5 Manual

IM 308-C master interface and memory card
Meaning of "BF"
Meaning of "RN",
"OF" and "IF"
Table 3-3

Meanings of the LEDs on the IM 308-C master interface

RN OF IF
On On On
On Off Off
3-4
The "BF" LED indicates bus-fault messages. It can indicate the following:
Table 3-2 Meanings of "BF" LED on the IM 308-C master interface
BF Meaning
Off All configured slaves are
addressable
1
On Bus fault
(physical fault)
Flashes At least one slave not
addressable
1
: During power-up, the "RN", "OF" and "IF" LEDs light up along with the "BF" LED
for approx. 0.5 seconds.
The meanings of the LEDs RN (= RUN), OF (= OFF) and IF (= IM FAULT)
are as follows:
If the IM 308-C is operated as DP master and as DP slave, the LEDs always
apply to the IM 308-C as DP master.
Meaning
IM 308-C is powering up ("BF" LED on).
IM 308-C as DP master: Status is RUN:
IM 308-C reads the slave inputs and sets the outputs.
The IM 308-C can receive the token from another mas-
ter and pass it on.
IM 308-C as DP slave: normal operation; IM 308-C as
DP slave exchanges data with the DP master.
Remedy
–
Check whether:
the bus cable is connected to the IM 308-C
the bus is interrupted
the DP master receives the token (highest
station address not correct in the bus parame-
ters; the HSA is lower than the station num-
ber of the DP master)
Wait until the IM 308-C has powered up. If the
LED does not cease flashing, check the DP
slaves or analyze the diagnostics report for the
DP slaves.
Only if IM 308-C is DP slave: check whether the
DP master addresses the IM 308-C/DP slave.
–
–
ET 200 Distributed I/O System
EWA 4NEB 780 6000-02a
Remedy