I185 GB 06 15
LRX D01
46
TIMER MODE 7 (FLASH CASCADE WITHOUT RESET)
Mode 7 Timer is a Flash Timer which using two Timers in a cascade configuration without reset. The second Timer number follows the first
Timer. The cascade configuration connects the timer status bit of first timer to enable the second timer. The second timer will time up to its
preset value then flash and its timer status bit will enable the first timer. Additionally, the Timer current value will reset to zero when Timer is
disabled. In the example below, timer status T01 will be ON after it completes its timing sequence of 2.5 seconds. Timer 2 will then begin its
timing sequence of 1 second. When the current time value of Timer 2 reaches its preset of 1 second, its status bit T02 will flash and Timer 1
will begin timing again. This type of cascade timer is often used in combination with a counter in applications where it is necessary to count
the number of time cycles completed.
The two Timers used in Timer Mode 7 cannot be reused as Timers for other modes in the same program.
2
1
4
5
3
6
– The current value of Timer cannot be kept on a loss of power to LRD.