Siemens SIMATIC ET 200M Operating Instructions Manual page 256

Glossary
Grounding
Grounding involves connecting an electrically conductive part with the ground electrode
through a grounding system.
GSD file
The properties of a PROFINET device are described in a GSD file (Generic Station Description),
which contains all required information for the configuration.
You can integrate PROFINET devices in STEP 7 using a GSD file similar to PROFIBUS devices.
In the case of the PROFINET IO the GSD file is in XML format. The structure corresponds to ISO
15734, the worldwide standard for device specifications.
For PROFIBUS, the GSD file is in ASCII format (according to IEC 61784-1:2002 Ed1 CP 3/1).
Hardware interrupt
A hardware interrupt is triggered by interrupt-enabled S7-300 modules when a specific event
occurs within the process. The hardware interrupt is reported to the CPU. Depending on the
interrupt priority the associated organization module will be processed.
In SIMATIC S7 / M7: Assigning parameters to a top and bottom threshold, for example,
defines a working range. If the process signal (e.g. temperature) of an analog input module
leaves this working range, the module will trigger a process interrupt (if interrupts are
enabled). The CPU then interrupts the user program or any lower priority classes and starts
processing the process interrupt block (OB 40).
In SIMATIC PCS 7: If the IM 153-2 reports a process interrupt, this means that at least one
data record contains messages concerning time-stamped signal changes or special messages.
The DP master CPU can read and evaluate the data record(s).
In SIMATIC S5: The process interrupt is simulated in the device-specific diagnostics. Cyclic
scanning of the relevant bits in the device-specific diagnostics will enable you to detect
process interrupts, such as upper threshold exceeded.
I&M data
→ Identification and maintenance data
I/O bus
Part of the → S7-300 backplane bus in the automation system. Optimized for rapid signal
exchange between the IM 153-x and the signal modules. The I/O bus is used to transfer
→ user data (such as the signal module's digital input signals) and system data (such as the
signal module's default parameter datasets).
I/O modules, single-channel
A single-channel I/O module scenario means that – unlike redundant I/O modules – the I/O
module is available only once for each process signal. The connection can be unidirectional or
in series.
256
Operating Instructions, 04/2022, EWA-4NEB7806006-09
ET 200M