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4.2 Outline of High-speed Counters

3-208

Visual KV

Series

Chapter 4 High-speed Counters

■ Other special utility relays

■ Data memory

Note 1: As with the internal register, the contents of data memory are stored as 16-

bit binary data.

Note 2: The contents of data memory are stored even when the Visual KV is turned

off or "ALL DATA MEMORY CLEAR" is executed. It is stored more than 20 days

with the KV-10xx, and more than two months with other models.

Specifications of high-speed counters

• The high-speed counter is a hardware-based up/down counter that counts from 0

to 65535 with an auto-reset function.

• The following operands can be specified for count inputs.

• High-speed counters CTH0 and CTH1 store current values only.

• When input relays 0004 and 0005 are selected as operands, they can be used as

high-speed counters with a response frequency of 30 kHz.

• When special utility relays 2100 through 2102 and 2200 through 2202 are se-

lected as operands, the high-speed counters can be used as high-speed timers.

• When relay 0500 is selected as an operand for CTH1, CTH1 can count the clock

pulses produced by CTH0.

• CTH0 and CTH1 can be used as 24-bit high-speed counters when the MEMSW

instruction is set.

➮

"MEMSW instruction" (p. 3-92), "4.4.1 24-bit High-speed Counter" (p. 3-221), "4.3.4 Count Input

Method" (p. 3-212), "When using comparator output from other counters as count input" (p. 3-213).

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Keyence Visual KV Series Manual do Utilizador Página 232

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