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4.6 Direct Clock Pulse Output

3-237

Visual KV

Series

Chapter 4 High-speed Counters

4.6 Direct Clock Pulse Output

This section describes the outline and setting method for direct clock pulse output.

4.6.1 Outline of Direct Clock Pulse Output

Using the high-speed counter (CTH) and high-speed counter comparator (CTC), the

KV PLC can output clock pulses directly through output relays 0500 and/or 0501

without any delays caused by the scan time.

The period (frequency) and width of the pulses are determined by the period of the

internal clock used for the high-speed counter (CTH) and high-speed counter com-

parator (CTC).

The period of the clock pulse (frequency) can be changed with the program within

the following ranges.

Pulses of the internal clock are counted with the high-speed counter (CTH). When

the number of current pulses reaches the preset value of the high-speed counter

comparator (CTC), the ON/OFF status of output relays 0500 and/or 0501 is toggled

to output direct clock pulses.

Count value

Note 1: The operation of output relays 0500 and 0501 are determined by setting the

special utility relays.

Note 2: For more about setting special utility relays, refer to "4.2 Outline of High-

speed Counters" on page 3-206.

Note 3: The ON/OFF status when the direct clock pulse output is started is the

same as when the last direct clock pulse output is stopped. (Initial status: OFF)

Note 4: Output relays 0500 and 0501 cannot be used in a normal program during

direct clock pulse output.

CTC

ONON

tuptuOkco l cl an r e t n I)ycneuqe r F (do i r epes l upf oegnaR

0050

0 . 1 (0012 µ )s02 µ ) zH5 1 (sm5 . 56o t ) zHk05 ( s

0 . 01 (1012 µ )s02 µ )zH5.1(sm3.556ot)zHk05(s

0 . 001 (2012 µ )s002 µ )zH51.0(sm5.3556ot)zHk5(s

1050

0 . 1 (0022 µ )s02 µ ) zH5 1 (sm5 . 56o t ) zHk05 ( s

0 . 01 (1022 µ )s02 µ )zH5.1(sm3.556ot)zHk05(s

0 . 001 (2022 µ )s002 µ )zH51.0(sm5.3556ot)zHk5(s

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Keyence Visual KV Series Manual de usuario Pagina 261