Siemens Simatic S7-300 CPU 31xC Series User Manual

Glossary
S7-300, CPU 31xC and CPU 31x: Installation
Operating Instructions, Edition 08/2004, A5E00105492-05
Glossary-9
Interrupt, process
See Process interrupt
Interrupt, status
A status interrupt can be generated by a DPV1 slave and causes OB 55 to be called on the
DPV1 master. For detailed information on OB 55, see the
Reference Manual System
software for S7-300/400: System and Standard Functions
.
Interrupt, time-of-day
The time-of-day interrupt belongs to one of the priority classes in
SIMATIC S7 program processing. It is generated at a specific date (or daily) and time-of-day
(e.g. 9:50 or hourly, or every minute). A corresponding OB will be processed.
Interrupt, update
An update interrupt can be generated by a DPV1 slave and causes OB56 to be called on the
DPV1 master. For detailed information on OB56, see the
Reference Manual System
software for S7-300/400: System and Standard Functions
.
Interrupt, vendor-specific
A vendor-specific interrupt can be generated by a DPV1 slave. It causes OB57 to be called
on the DPV1 master.
Detailed information on OB 57 can be found in the
Reference Manual "System Software for
S7-300/400: System and Standard Functions
.
IO controller
See PROFINET IO Controller
See PROFINET IO Device
See PROFINET IO Supervisor
See PROFINET IO System
IO device
See PROFINET IO Controller
See PROFINET IO Device
See PROFINET IO Supervisor
See PROFINET IO System

Siemens Simatic S7-300 CPU 31xC Series Specifications

General

Series	S7-300 CPU 31xC
Power Supply	24 V DC
Communication Interfaces	MPI, PROFIBUS DP
Programming Languages	LAD, STL, FBD, SCL
Operating Temperature	0°C to +60°C
Memory	48 KB - 512 KB
Dimensions	40 x 125 x 130 mm (varies by model)