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Mode of operation of the PL7_TOF timer function
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Original instructions
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Mode of operation of the PL7_TOF timer function
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Original instructions
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Effect...
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Description
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of a cold restart
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(%S0=1), causes a reset to zero of the current value, a reset to 0 of the Q output and the preset value is reset to the value defined in the configuration.
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of a warm restart
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(%S1=1) has no effect on the current value of the timer or on the preset value. The current value does not change during a power outage.
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a change to stop, deactivation of a task or execution of a breakpoint
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Does not freeze the current value.
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of a program jump
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The fact of not scanning the instructions where the timer block is programmed does not freeze the current value ET which continues to increase towards PT.
Similarly bit Q retains it normal function and can thus be tested by another instruction. On the other hand the output, directly cabled to the output Q, is not activated as it is not scanned by the PLC
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of modifying the preset
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A modification to the preset value by instruction or adjustment is only taken into account the next time the timer function is activated.
A modification of the preset value in the variables editor is only taken into account after a cold restart (%S0=1).
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