TON_FUN

This is a user-defined function from a system function block. TON_FUN allows you to program a switch-on delay.

Parameters

Input

start (BOOL)

timer ON

an internal timer is started for each rising edge detected at start

PT (TIME)

switch-on delay (PT = preset time)

16-bit value: 0–327.27s

32-bit value: 0–21,474,836.47s (32-bit value not available for FP3, FPC, FP5, FP10/10S)

resolution 10ms each

Input/output

dutInstance (TON_FUN_INSTANCE_DUT)

Internal memory containing the internal values and states, which corresponds to the instance memory of the associated FB.

Output

Q (BOOL)

signal output

set to TRUE if PT = ET

ET (TIME)

elapsed time

indicates the current value of the elapsed time

The value can be changed during counting operation by writing to the variable from the programming editor.

Remarks

• Q is set delayed with the time defined in PT. Resetting is without any delay.

• If the input start is only set for the period of the delay time PT or even for a shorter period of time (t3 - t2 < PT), Q will not be set.

Time chart