SETTING TIMER SET TIME USING VARIABLE IN DATA BLOCK PART9 скачать в хорошем качестве

SETTING TIMER SET TIME USING VARIABLE IN DATA BLOCK PART9

This part explains how to set the timer preset value (set time) using a variable stored in a Data Block (DB) in a Siemens S7-1200 PLC. Instead of writing a fixed time directly inside the timer block (like T#5s), the preset time is taken from a DB variable. This allows the timer value to be changed from an HMI, SCADA, or program logic without editing the PLC code. How it works: A timer (TON, TOF, or TP) is used in the program. The PT (preset time) input of the timer is linked to a variable inside a data block. The operator or program writes a new value to this DB variable. The timer automatically uses the new time value during operation. Example tags: DB_Timer.SetTime → Timer preset value (TIME type) DB_Timer.TimerEnable → Start signal DB_Timer.TimerDone → Timer finished output Advantages: Timer value can be adjusted from HMI/SCADA. No need to download program after changing time. Better structure and flexibility for training and real projects. Useful for delays, motor start timing, alarms, and process control. Typical use: Conveyor delay, pump delay, alarm delay, or machine sequence timing where the delay must be adjustable by the operator in projects using **Siemens TIA Portal and S7-1200 PLCs.