Siemens M7-400, S7-400 Cyclic Conversion of the ADC Channels

Interface Submodules
13-50 S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07
Cyclic Conversion of the ADC Channels
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 “08H”).
2. Wait for interrupt.
3. Read the values at the relevant address (offset addresses “00H” to “06H”).
4. Acknowledge the interrupt by writing to the offset address “0EH”, data bits 0 to
15 are irrelevant here.