Keyence DL-DN1 Manual do Utilizador descarregar pdf (Página 46)

3-2 I/O Communication

3-16

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

Communicating with the GT2 series

The following describes how the DeviceNet mas ter unit commu nicates with the DL-

DN1 (slave u nit) using I/O communication (polling).

"Reading an output from a sensor amplifier" (page 3-16)

"Entering an external input into a sensor amplifier" (page 3-17)

"Reading comparator values (P.V. values) from sensor amplifiers" (page 3-18)

"Changing the Bank Number

of Sensor A

mplifiers" (page 3-19)

"Rewriting a Setting Value of a Sensor Amplifier" (page 3-20)

For the communication methods us ing explicit messaging, see "Explicit

Messaging" (page 3-21).

The button operation of the sensor amplifier is locked for approximately 10

seconds after the end of each of the operations listed below. The screen

displays "COM-Lock" for 2 seconds while switching to the locked state or

when button operation is attempted dur

ing the locked sta te. T

he screen

displays "COM-Unlock" for 2 seconds while unlocking. However, the initial-

ization screen appears when an initialization reset is executed. The initial-

ization screen remains displayed if any of the following operations is

repeated.

•External input

•Cha nging a bank

•Rewriting a setting value(s)

Reading an output from a sensor amplifier

Available outputs: HIGH, LOW, GO, HH, and LL

Device assignments: "Output" (page 3-9)

This example reads the HIGH output from the sensor amplifier of ID01.

It assumes that the operating mode assigned to the device is 3-ou tput mode.

(1)The output from the sensor amplifier is brought into the IN area by I/O

communication.

When using HH output or LL output, set the "special output setting"

of the sensor amplifier to "5-output."

Communication Methods

Reference

PLC

Output of sensor amplifier

IN area [n+1]Bit0

Sensor amplifier

(1)

Output

HIGH output of ID 01

OFF

Point

1 2 ... 41 42 43 44 45 46 47 48 49 50 51 ... 81 82

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