Flashing Code Output By Leds On Im 308-C When The Operating System Is; Loaded From Memory Card - Siemens SIMATIC S5 Manual

IM 308-C master interface and memory card
Code for operat-
ing-system version
3-12
Before the IM 308-C operating system is loaded from the memory card, the
four LEDs on the IM 308-C output a flashing BCD code which indicates the
current statuses of the operating system on the IM 308-C and on the memory
card.
You can call up the code indicating which version of the operating system is
currently available on the IM 308-C (see steps 1 through 6, Table 3-9), when
the mode selector switch of the IM 308-C is in the "OFF" position and you
switch on the power supply.
Table 3-9 Flashing code output by LEDs on IM 308-C when the operating system is

loaded from memory card

3
RN
2
2
2
OF
1
2
BF
0
2
IF
Step
1 3 in sequence from bottom to top
2 all LEDs are off
3 BCD code indicating the current operating-system
version of the IM 308-C
4 all LEDs are off
5 BCD code indicating the current operating system
release of the IM 308-C
6 all LEDs are off
7 3 from top to bottom in sequence
8 all LEDs are off
9 BCD code indicating the operating-system version on
the memory card
10 all LEDs are off
11 BCD code indicating the operating-system release on
the memory card
12 all LEDs are off
V x.y
Version Release
LED sequence
ET 200 Distributed I/O System
EWA 4NEB 780 6000-02a
Duration
3 s
1 s
4 s
1 s
4 s
1 s
3 s
1 s
4 s
1 s
4 s
1 s