Hi，rdoliveira

Got it. Quite clear.

Do you have some manual for TIA PORTAL WINCC HMI/RT, I try to source some user manual, but what I found from the internet are quite general, not so useful for me.

Really appreciate your immediate help. 

Regards

Steven

rdoliveira

Yes, the time base is 200ms and then multiplies by 25 = 5000

Parameter

Tag

The tag whose value is changed.

Cycle

The factor by which the basic cycle of 200 milliseconds is multiplied. The cycle defines when the tag value is changed by the specified value. Possible cycles between 1 and 32767.

Maximum value

The maximum value that the tag can assume during simulation. The maximum value must be greater than the minimum value but less than / equal to 32767.

Minimum value

The minimum value that the tag can assume during simulation. The minimum value must be lower than the maximum value but greater than / equal to -32768.

Value

The value by which the tag value is changed during each cycle. Possible values between -32768 and 32767.

• A positive value increases the tag value. When the maximum value is reached, the tag value is set to the minimum value after the next update cycle.

• A negative value reduces the tag value. When the minimum value is reached, the tag value is set to the maximum value after the next update cycle.

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