Siemens SIMATIC S5-115F User Manual page 123

S5-115F Manual
Table 5-1. Order of Suboperations for Direct Access to Digital Modules
First The accumulator is loaded
Then
Note
If you use direct access to call an address whose slot is unoccupied, the CPU goes into
the "STOP" mode with the "QVZ" (time-out) error message.
EWA 4NEB 811 6148-02
Read Write
The I/O byte/word is output
The PIQ byte/word is overwritten with
the new I/O byte/word.
Addressing
5-9