Datasheet

Commisioning INSYS GSM 4.2 LOGO!
8 Dezember 06
3 Function Descriptions
3.1 Description of Terms
3.1.1 PA Buffer/PA-SMS
3.1.1.1 PA Buffer (Process Image Buffer)
The PA buffer contains the current I/O states or values of the Siemens LOGO! and
its expansion modules:
- Digital inputs (I1 ... I24)
- Digital outputs (Q1 to Q16)
- Digital bit memory (M1 to M24)
- Shift register inputs (S1 to S8)
- LOGO! operator buttons (arrow keys ÕÖ×Ø)
- Analog inputs (AI1 to AI8)
- Analog outputs (AQ1 to AQ2)
- Analog bit memory (AM1 to AM6)
The PA buffer contains the maximum possible I/O elements of a Siemens LOGO!
system (including expansion modules).
The number of actual I/O elements in the system is dependent on the respective
LOGO! Basic module version and the utilized expansion modules.