Keyence Visual KV Series Manual do Utilizador descarregar pdf (Página 386)

100

101

9.5 Programming Examples

KV-10/80 Series Only

KV-300

KV-10/80

Chapter 9 KV-AD4/DA4 Analog I/O Unit

1-362

1. DM0996 is initialized when the power is turned ON.

(That is, #2000 is written to DM0996.)

2. #7500 (7.5 V) is written to DM0000.

3. ((DM0000 ÷ 5 mV) + 2000) is calculated when input 0000 is ON, and the calcula-

tion result is written to DM0001.

4. (2000 - (DM0000 ÷ 5 mV)) is calculated when input 0000 is OFF, and the calcula-

tion result is written to DM0001.

5. Before the digital data is written to data memory for D/A conversion, check that

the data is #4095 or less.

Note: An unsteady value will be output if a value outside the range 0 to 4095 is

written to data memory for D/A conversion.

6. The output data will be updated at the rising edge of special utility relay 2800. (As

internal relay 1000 switches ON/OFF at each scan, the output data will be

updated every two scans.)

Example 1: Outputting Analog Voltage (-10 to +10 V)

• Data that has been written to DM0000 is converted to digital data for analog

output.

• The digital data is sent to analog output V0 on the KV-DA4.

(Digital data is written to data memory DM0996.)

• +7.5 V is output when input 0000 is ON.

• -7.5 V is output when input 0000 is OFF.

2007

#07500

DM0000

0000

#00000

LDA

TM00

STA

#00005

DIV

#02000

ADD

DM0001

STA

DM0001

STA

#02000

LDA

DM0001

SUB

DM0001

STA

DM0000

LDA

0000

1000

1500

#00000

LDA

TM00

STA

#00005

DIV

DM0000

LDA

1000

2800

2008

#02000

LDA

DM0996

STA

1500

2002 2011

DM0001

LDA

#04095

CMP

DM0001

LDA

DM0996

STA

( )

KVHKA Chap 09.p65 08.3.11, 11:20 AM362

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