Siemens SIMATIC S5-90U System Manual page 109

S5-90U/S5-95U
ISTACK Display on the 710/730/750 and 770 Programmers
The ISTACK display is divided up into two different programmer screen forms. The first screen form
shows the control bits of the ISTACK, the second one basically lists the causes of errors. Table 5-2
shows the control bit screen form of the ISTACK. The relevant control bits for the S5-90U/S5-95U
are shaded.
STEUERBITS
NB PBSSCH
NB NB
STOZUS STOANZ
NB UAFEHL
ASPNEP ASPNRA
KEINAS SYNFEH
not relevant for S5-90U
*
Table 5-3 includes the ISTACK display for the causes of errors and other relevant data. The data
pertaining to the S5-90U/S5-95U are shaded.
INTERRUPT STACK
BLOCK: 01
INS-REG: 0000
BLK-STP: 5E03
ACCU1: FFFF
CONDITION CODE:
CAUSE OF INTERR.:
not relevant for S5-90U
*
EWA 4NEB 812 6115-02b
Table 5-2. Display of Control Bits
BSTSCH SCHTAE ADRBAU
NB REMAN
NEUSTA NB BATPUF*
MAFEHL EOVH
KOPFNI PROEND ASPNEEP
NINEU NB
Table 5-3. Display of the ISTACK
SAC: 25CA DB-ADD:
OB-No.: 1 DB-No.:
REL-SAC.: 0000
ACCU2: 0000
CC1 CC0 OVFL
STATUS RLO
X
STOPS NB SUF*
X
STUEB NAU QVZ
ASPFA
Diagnostics and Trouble Shooting
SPABBR NAUAS
NB NB
NB BARB
X
NB AF
PADRFE ASPLUE
NB NB SUMF
0000
CARRY ODER
TRAF NNN
ZYK PEU
QUITT
NB NB
BARBEND
NB NB
RAMADFE
URLAD
ERAB
X
STS
BAU
5-5