Siemens SIMATIC S7-300 Manual page 502

Glossary
Monoflop time
STEP 7 parameter for the SM 338; POS-INPUT position detection module. The monoflop
time is equivalent to interval between two SSI message frames ( → Absolute encoder.)
MPI
Multi-Point Interface. SIMATIC S7 interface for programming devices. Allows central access
to remote programmable modules (CPUs, CPs), Text Displays und Operator Panels. MPI
nodes can intercommunicate.
Noise suppression
STEP 7 parameter for analog input modules. The frequency of AC mains may corrupt
measured values, in particular in the low voltage ranges, and when thermocouples are being
used. At this parameter, the user defines the mains frequency prevailing on his system.
OB
→ Organization Block
Operating state
Operating states known to SIMATIC S7 automation systems: STOP, → STARTUP, RUN and
STOP.
Operational limit
Represents the measuring/output error of an analog module across the entire permissible
temperature range, based on the module's rating.
Organization block
OBs form the interface between the CPU operating system and the user program. The
sequential order of user program execution is defined in the organization blocks.
Parameter
1. Tag of a → Code block
2. Tag used to set one or several properties of a module. Each module is supplied with
PG
→ Programming device
Glossary-6
default parameters which users may edit in
STEP 7
.
S7-300 Automation System Module data
Manual, 08/2006, A5E00105505-04