Siemens S7-400 Benutzerhandbuch

13-50

S7-400, M7-400 Programmable Controllers Module Specifications

A5E00069467-07

Below are listed the steps required for cyclic conversion of the ADC channels:

1. Set the AC bit in control register 1 to “1” (offset address “08

H

”).

2. Wait for interrupt.

3. Read the values at the relevant address (offset addresses “00

H

” to “06

H

”).

4. Acknowledge the interrupt by writing to the offset address “0E

H

”, data bits 0 to

15 are irrelevant here.