Keyence DL-DN1 Manual de usuario descargar pdf (Pagina 48)

3-2 I/O Communication

3-18

- DeviceNet Compatible Network Unit DL-DN1 User’s Manual (GT2) -

Communicating with the GT2 series

Reading comparator values (P.V. values) from sensor amplifiers

Comparator values (P.V. values) are read by reading the IN areas which are assigned

the ID numbers of sensor amplifiers.

Device assignments: "Comparator Value (P.V. Value)" (page 3-10)

This example illustrates how to read the comparator values from the sens or amplifiers

of ID 01, 02, and 03.

It assumes that th

e operating mode assigned to the devices are "3-output mode +

current value, without extension."

(1) When the comparator value of a sensor amplifier is updated, the new comparator

value is entered into the IN area via I/O communication.

If the judgment value is correct, the parameter range is - 199.9999 to 199.9999.

If the current value is over range, under range, or

invalid, the previous value is

retained without updating the current value. Use the value with the judgment value

property.

(2) The property of the comparator value is entered. If the comparator value of a

sensor amplifier is "over", "under," or "invalid," the bit corresponding to the ID

number of that sensor amplifier flips to 1.

If the calculation setting is set to the calculation mode and the appli-

cation is set to other than standard difference, the main unit cannot

read the comparator value (P.V. value). Both the main unit and the

expansion unit read the raw value (R.V. value).

When you read the comparator value (P.V. value) from the main unit,

use explicit messaging or the calculation-only mode.

PLC

(2)

Comparator value property

Each bit of IN [n+4]

Comparator value of ID 01

1234 4567 6789

IN area [n+5 to 6]

Comparator value of ID 02

2345 5678 7890

IN area [n+7 to 8]

Comparator value of ID 03

3456 8901

IN area [n+9 to 10]

Sensor amplifier

Comparator value of ID 01

1234 4567 6789

Comparator value of ID 02

2345 5678 7890

Comparator value of ID 03

3456 8901

(1)

Point

1 2 ... 43 44 45 46 47 48 49 50 51 52 53 ... 81 82

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