Nematron Pointe Controller - Manual (Page 353)

Pointe Controller User Guide Appendix C: Ladder Diagram Block Reference
351
Param Name Config Var Type Description
PT Preset
Time opt %IUD
%QUD
%MUD
Numeric
The length of the pulse, in msecs. If
no Preset Time is defined, then the
preset value of Timer variable is
used instead.
ET Elapsed
Time opt %QUD
%MUD
The time elapsed since the Input
State became on, in msecs. In most
instances, the Elapsed Time equals
the current value of the Timer
variable.
C.2.2 Timer, ON Delay (TON)
When used in a Ladder Diagram, the TON block turns on the output state after a
specified time delay has elapsed.
Select the tool (from the Timers and Counters Blocks toolbar) and click on a
ladder rung to insert the following block:
Once the block is inserted, you can double-click on it to configure it.
Functional Description
When the Input State (IN) becomes on, the associated Timer variable (TIMER) is
started and continues while IN remains on. When the Timer equals the Preset
Time input (PT), the Output State (Q) is turned on.
When IN becomes off, Q is turned off and the Timer is reset to 0.
If IN becomes off while the Timer is counting but before it equals PT, then the
Timer is reset to 0 and Q remains off.
The Elapsed Time output (ET) shows the time passed since IN became on; in other
words, it shows the current value of the Timer itself. When the Timer reaches PT,
ET remains equal to PT until it is reset. When the Timer is reset to 0, ET is reset to
0.