Chapter 4. CPU module
4 - 5
4.2.5 Timer Processing
The CPU module timer is on incremental timer which increase its present value according to the measuring
time. Three types of On Delay Timer(TON), Off Delay Timer(TOF) and Pulse Timer(TP) are available.
Its measuring range is 0.001 to 4,294,967,295 sec (1,193 hours) by 1 ms. For details, refer to ‘GLOFA-GM
Programming’.
1) On Delay Timer Process Time Change and Contact On/Off)
Timer Process time is newly changed when the timer function block is executed. When the process time
reaches the setting time (process time = setting time), the Timer output contact turns on.
On Delay Timer Timing Diagram is shown as below.
2) Off Delay Timer Process Time Change and Contact On/Off
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If input condition turns on, timer output contact(Q) turns on. If input condition turns off, timer process time
change starts.
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The process time is newly changed when the timer function block is executed. When the process time
reaches the setting time (process time = setting time), the contact (Q) turns off. The following diagram
shows Off Delay Timer Timing.
