OFF-Delay Timer:
Preset value: It is multiplied by the time base of the timer to specify the time delay.
Accumulated value: It specifies the time from the moment that was disabled up to the current moment. The address is for accumulators as follows T4: 0.ACC Enabled bit is set when the line is true, indicates that the timer is enabled. It is clear when the line is false. The address for these bits is T4: 0 / EN.
Timing timer bit is set in the time interval that occurs between the timer is disabled and when the accumulated value reaches the preset(here=180 seconds) value. The rest of the time this bit is clear. The address for these bits is T4: 0 / TT. Done bit is set when the accumulated value is equal to the preset value and the timer is disabled. It is clear when the timer is enabled. The address for these bits is
for example T4: 0 / DN.
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