Diagnostics and Troubleshooting
S5-100U
Calculating the Address (necessary only when using the PG 605U)
In order to be able to make program corrections, it is necessary to have the address of the
statement that led to the fault referenced to the particular block (relative address).
The faulty block is found by comparing the SAZ (STEP address counter) contents and the
“DIR PC” display.
The relative error address gives the difference between the SAZ value and the block start address.
Figure 5-3 gives you an example of how to calculate the relative error address.
Figure 5-3. Calculating the Error Address
ISTACK byte
The absolute address EE42 is
greater than the start address for
PB7. The faulty statement is
therefore in PB7.
25
26
STEP
address counter
EE
42
DIR PC
Block
Start Address
PB0
PB7
OB1
EE18
EE3C
EE0A
Calculating the relative address:
EE42 - EE3C = 0006
“0006” is the relative address of the statement in PB7 following the statement that
caused the CPU to go into the STOP mode.
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Output of an Error Statement
Use the “SEARCH” programmer function to find certain program locations and to look for the
relative error address. Refer to your programmer manual for additional information about this
programmer function.
5-10
EWA 4NEB 812 6120-02b
Содержание SIMATIC S5-100U
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Страница 21: ...1 The SIMATIC S5 System Family EWA 4NEB 812 6120 02b ...
Страница 22: ...Figures 1 1 Members of the SIMATIC S5 System Family 1 1 EWA 4NEB 812 6120 02b ...
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Страница 505: ...B Dimension Drawings EWA 4NEB 812 6120 02b ...
Страница 515: ...C Active and Passive Faults in Automation Equipment EWA 4NEB 812 6120 02b ...
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Страница 523: ...D Information for Ordering Accessories EWA 4NEB 812 6120 02b ...
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Страница 531: ...E Reference Materials EWA 4NEB 812 6120 02b ...
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Страница 535: ...F Siemens Addresses Worldwide EWA 4NEB 812 6120 02b ...
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Страница 543: ...Index EWA 4NEB 812 6120 02b ...
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