U90 Ladder offers 64 On Delay Timers. Timers have a preset value, a current value, and a bit value. Timers always count down from the Preset Value. The timer value is 14 bits.
Click on the Timers folder in the Program Navigation pane to display the complete list of Timers. Scroll down to view the complete list.
To place a Timer in your program, place a direct coil in a net, and select T.
Timer resolutions |
10mS (0.01S)(from 00:00:00.01 to 00:02:43.83 ) |
100mS (0.1S)(from 00:00:00.10 to 00:27:18.30) |
1000mS (1.0S)(from 00:00:01.00 to 04:33:03.00 ) |
10000mS (10.0S)(from 00:00:10.00 to 45:30:30.00) |
The first 14 bits (from the LSB) of the Timer register contains the value. The two most significant bits contain the Timer resolution.
Note that:
A Timer value can be displayed in a Display as a current or elapsed value/
The Resolution field is Read-only. The resolution is a function of the Timer Preset Value.
You cannot change the resolution of a timer when the application is running.
A timer's current value can be changed at any time, including when the timer is active. The new value can be either greater or smaller than the previous value; storing 0 into a timer's current value stops it immediately.
A change of Timer Preset value without changing the resolution will take effect when the timer restarts.
Changing the resolution of the timer's preset value does not affect the current resolution; it is therefore recommended that the resolution not be changed while the timer is active.
During Stop mode, timers continue to run.