Siemens S5-100U - Page 88

S5-100U Diagnostics and Troubleshooting
The following table shows which positions in the bit pattern are relevant for error diagnosis (gray-
shaded bits).
Table 5-2. ISTACK Output (Bytes 1 to 16)
STS
EBAC
Bit
Byte
Syst. Da-
ta Word
(SD)
6 5 4 3 2 1 0
1
2
7
STO
ZUS
3
4
5
6
IRRELEVANT7
8
9
10
11
12
13
14
15
16
BST
SCH
SCH
TAE
ADR
BAU
STO
ANZ
NEU
STA
BAT
PUF
AF
SYN
FEH
NINEU
TRAF
STA
TUS
ANZ1 ANZ0 OVFL OR VKE ERAB
6th nesting level OR VKE FKT
IRRELEVANT
4th nesting level
5th nesting level
OR VKE FKT
OR VKE FKT
SD 5
SD 6
SD 7
SD 213
SD 212
SD 211
SD 214
(UAW)
KEIN
AS
ASPFABAU
STUEB
NAU
STOPS
KOPF
NI
SUF
UR
LAD
SYSFEZYK PEU
NNN
Abso-
lute
Addr.
EA0A
EA0C
EA0E
EBAA
EBA8
EBA6
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IRRELEVANT
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EWA 4NEB 812 6120-02 5-3