Keyence Visual KV Series Bedienungsanleitung PDF herunterladen (Seite 42)

1.3 Device Configuration

3-18

Chapter 1 Programming

1.3.9 Timers and Counters

Timers and counters can be set in a program, and their outputs can be used as

contacts elsewhere in the program. [There is no restriction on the contact type (N.O.

or N.C.) and the order of use.]

A same number can be assigned to only one timer or counter. For example, T005

and C005 cannot be used in the same program.

Timer/Counter list

Description

■ Timers

• When 0.1-s timers (TMR) and high-speed 0.001-s timers (TMS) are used as

contacts, the "Tnnn" No. is used for both types. However, the form for setting is

different. "TMRnnn#ddddd" is used for 0.1-s timers, "TMHnnn#ddddd" is used for

high-speed 0.01-s timers, and "TMSnnn#ddddd" is used for high-speed 1-ms

timers (nnn = timer No, ddddd = timer set value).

• In a single program, different timer Nos. must be assigned to each of TMRnnn,

TMHnnn, and TMSnnn.

• When the PLC is stopped, all timers are reset and their current values become

equivalent to set values.

■ Counters

• When counters (C) and up/down counters (UDC) are used as contacts, the

"Cnnn" No. is used for both types. However, the form for setting is different.

"Cnnn#ddddd" is used for counters, while "UDCnnn#ddddd" is used for up/down

counters.

• In one program, different numbers must be assigned to each of the counters and

up/down counters.

• Even when operation is stopped, each counter stores whatever value it has at

that time.

➮

"TMR instruction" (p.3-67), "TMH instruction" (p.3-68), "TMS instruction" (p.3-69), "C instruction" (p.3-

72), "UDC instruction" (p.3-76).

■ High-speed counters and high-speed counter comparators

The Visual KV Se ries is equipped with two high-speed counters (CTH0 and CTH1)

and four high-speed counter comparators (CTC0, CTC1, CTC2, and CTC3) with a

30-kHz input response speed (frequency), two phases, and size of 16 or 24 bits.

Note: When a high-speed counter or high-speed counter comparator will be used as

a 24-bit device, a set value is required to be stored in a data memory using the

MEMSW instruction.

➮

For details about high-speed counters and high-speed counter comparators, refer to "Chapter 4 High-

speed Counters" (p.3-203).

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