-
If a large number of LWA instructions are used, a WDT (watch dog time) error may occur. Attention must be paid when using LWA instructions since WDT errors affect the scan time.
An LWA instruction stops the logic for the time specified in S1. If a flicker occurs while a movie is being played, use the LWA instruction.
You can use LWA instructions to prevent flickering while a movie is played. The flow of execution Power always passes through the LWA instruction.
If a large number of LWA instructions are used, a WDT (watch dog time) error may occur. Attention must be paid when using LWA instructions since WDT errors affect the scan time.
Restrictions on use
If a large number of LWA instructions are used, a WDT (watch dog time) error may occur. Attention must be paid when using LWA instructions since WDT errors affect the scan time.
Only one LWA instruction can be placed in one rung.
An LWA instruction must be the last instruction on the rung, just to the left of the right power bar.
An LWA instruction can be used only in MAIN and SUB. They cannot be used in INIT.
Program Example
When the bit variable is turned ON, the LWA instruction will be executed.
When the LWA instruction is executed, the logic program stops for the time (1 to 10 ms) specified in operand S1.
After the specified time has elapsed, processing will continue on the next rung.