Siemens SIMATIC S7-1500 System Manual page 376

Glossary
Parameters, static
In contrast to dynamic parameters, you cannot change static parameters of modules with the
user program but only by configuring in STEP 7, e.g. input delay of a digital input module.
PELV
Protective Extra Low Voltage = grounded extra low voltage with safe isolation
PLCopen
With these standardized instructions, you can use OPC UA client functions executed in an S7-
1500 CPU in your user program.
Process image (I/O)
The CPU transfers the values from the input and output modules to this memory area. At the
start of the cyclic program the signal states of the input modules are transmitted to the
process image of the inputs. At the end of the cyclic program the process image of the
outputs is transmitted as signal state to the output modules.
Product version (PV) = Function version (FV)
The product version or function version provides information on the hardware version of the
module.
PROFIBUS
PROcess FIeld BUS, process and fieldbus standard that is specified in IEC 61158 Type 3. It
specifies functional, electrical and mechanical characteristics for a bit-serial field bus system.
PROFIBUS supports the protocols DP (= Distributed I/O), FMS (= Fieldbus Message
Specification), PA (= Process Automation), or TF (= Technological Functions).
PROFIdrive Integrated
PROFIBUS profile specified by the PNO (PROFIBUS user organization) for speed-controlled and
position-controlled drives.
PROFINET
PROcess FIeld NETwork, open Industrial Ethernet standard which further develops PROFIBUS
and Industrial Ethernet. A cross-manufacturer communication, automation, and engineering
model defined by PROFIBUS International e.V. as an automation standard.
PROFINET IO
Communication concept for the realization of modular, distributed applications within the
scope of PROFINET.
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SIMATIC Drive Controller
System Manual, 11/2023, A5E46600094-AD