Keyence DL-PD1 Instrukcja Użytkownika Pobierz pdf (Strona 45)

3-5 Overview of PROFIBUS DP Communication

3-23

- PROFIBUS DP Compatible Network Unit DL-PD1 User's Manual (IG) -

Executing Communication

Communication Methods

The following describes how the master cyclically communicates with the DL-PD1

(cyclic communication).

• "Reading an output from a sensor amplifier" (page 3-23)

• "Entering an external input to a sensor amplifier" (page 3-24)

• "Reading comparator values (P.V. values) from sensor amplifiers" (page 3-25)

Reading an output from a sensor amplifier

Available outputs: High, Low, Go

This example shows how to read the High output from Slot 1 (ID01).

 In the monitor mode

(1) The output from the sensor amplifier entered into Bit 0 of the input octet 2 via cyclic

communication. (In the big endian format)

This example shows how to read the High output from the sensor amplifier ID01.

 In the I/O mode

(1) The output from the sensor amplifier entered into Bit 1 of the input octet 1 via cyclic

communication. (In the big endian format)

Output

High output of ID01

Sensor amplifier

Master

Slot 1

Bit 0 of the input octet 2

OFF

(1)

Master

DL-PD1 (Slot 0)

Bit 1 of the input octet 1

Sensor amplifier

Output

High output of ID01

OFF

(1)

1 2 ... 40 41 42 43 44 45 46 47 48 49 50 ... 73 74

Brak uwag

Keyence DL-PD1 Instrukcja Użytkownika Strona 45