Siemens SIMATIC S7-1500 System Manual page 380

Glossary
Time-delay interrupt
You can find relevant information in the entry "Interrupt, delay".
Time-of-day interrupt
You can find relevant information in the entry "Interrupt, time".
Timer
Timers are components of the system memory of the CPU. The operating system
automatically updates the content of the "timer cells" asynchronously to the user program.
STEP 7 instructions define the precise function of the timer cell (for example on-delay) and
trigger its execution.
U/f control
Speed control with output voltage setting on the basis of a V/f characteristic.
Update interrupt
You can find relevant information in the entry "Interrupt, update".
User program
SIMATIC differentiates between the operating system of the CPU and user programs. The user
program contains all instructions and declarations as well as data for the signal processing
that enable a plant or process to be controlled. The user program is assigned to a
programmable module (e.g. CPU) and can be structured in smaller units.
Value status
The value status is additional binary information of a digital input or output signal. The value
status is entered simultaneously with the process signal in the process image input and
provides information about the validity of the signal.
Vector control
Speed control with sublevel closed-loop control of flow and torque.
Warm restart
You can find relevant information in the entry "Restart".
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SIMATIC Drive Controller
System Manual, 11/2023, A5E46600094-AD