Siemens SIMATIC S7 Manual page 61

T
Tool
Transmission Rate
U
Upload
User Program
V
Variable
W
Work Memory
MODBUS / TCP communication via the integrated PN interface of the CPU
2XV9450-1MB02; Manual edition 2.1
A tool is a piece of software that is capable of accessing operating
system functions in a programming device.
According to DIN 44302, this is the number of binary decisions
transmitted per time unit. The unit is bps. he set or selected
transmission rate depends on various conditions, for example the
distance across
Uploading means loading objects (e.g. code blocks) from the load
memory of the PLC into the programming device.
The user program contains all instructions and declarations for signal
processing, by means of which a system or a process can be
controlled. The user program for SIMATIC S7 is structured and is
divided into smaller units called blocks.
A variable is an operand (e.g. E 1.0) which can have a symbolic name
and can therefore also be addressed symbolically.
The work memory is a RAM on the PLC which the processor accesses
while processing the user program.
Glossary - 5