Glossary
Glossary-5
Programmable Logic Controllers S7-300 Module Data
A5E00105505-03
Integration time
Parameter in STEP 7 for analog input modules. The integration time is the in-
verse value of the → Interference frequency suppression in ms.
Interface, multipoint
→ MPI
Interference frequency suppression
Parameter in STEP 7 for analog input modules. The frequency of the AC net-
work can interfere with the measured value, especially with measurements in low
voltage ranges and with thermocouples. This parameter is used by the user to
specify the prevailing line frequency on his system.
Interrupt
The SIMATIC S7 is familiar with 28 different run-time level, which govern running
of the user program. These run-time levels include interrupts such as hardware
interrupts, among other things. When an interrupt occurs, the operating system
automatically calls an assigned organization block in which the user can program
the reaction he wants (for example, in an FB).
Interrupt, diagnostic
→ Diagnostic Interrupt
Interrupt, end-of-scan-cycle interrupt
→ Hardware interrupt
Interrupt, hardware
→ Hardware interrupt
Linearity error
The linearity error identifies the maximum deviation of the measured/output value
from the ideal linear relationship between the measuring/output signal and the
digital value. The data is a percentage and relates to the rated range of the ana-
log module.
Logic block
In a SIMATIC S7 context, a logic block is a block that contains a part of the
STEP 7 user program. By contrast, a data block only contains data. There are
the following logic blocks: organization blocks (OBs), function blocks (FBs), func-
tions (FCs), system function block (SFBs), system functions (SFCs).
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