9.8 SUMMARY

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Latch and unlatch instructions will hold outputs on, even when the power is turned off.

Timers can delay turning on or off. Retentive timers will keep values, even when inactive. Resets are needed for retentive timers.

Counters can count up or down.

When timers and counters reach a preset limit the DN bit is set.

MCRs can force off a section of ladder logic.