Hi everyone,

My project is using s7-300 and siemens hmi using tia portal.
Anyone can give me idea how to set timer value from hmi to plc?.

You will want to include a variable in the HMI that has a word address in the PLC. This will be the timer setpoint that can be changed from the HMI. Then, configure the PT parameter of an IEC timer in the PLC to be the word variable defined in the HMI as the timer setpoint.

If you are using s5 timers , you can set the tag in the HMI as word , then in the PLC you must first convert that tag from integer to BCD and finally you can transfer the output of that conversion to the timer set value