BECKHOFF EL6900-FB - Manual (Page 72)

Function blocks
70 Function blocks for TwinSAFE logic terminals
3.12 The TON function block
3.12.1 Functional description
FB TON is used to realize a switch-on delay. Logic 1 at input TonIn is transferred to the output with a set
delay time. The output is not activated if the input is set to 0 again before the delay time has elapsed. The
error output is inactive since the block sets no errors.
The maximum switch-on delay is 6000 x 100 ms (10 minutes).
Figure 3-31: TON function blocks
Note
KL6904
The TON block is not available in the KL6904.