Rockwell-automation 1760-DNET Pico DeviceNet Communications Module Use Bedienungsanleitung PDF herunterladen (Seite 53)

Publication 1760-UM003A-EN-P - September 2005

Application Examples for Pico 6-9

Local analog inputs: IA1 – IA4

The analog inputs on the Pico basic unit (I7, I8, I11, I12) can be read

directly via DeviceNet. The 16-bit value is transferred in Intel format

(Low Byte first).

Table 6.14 Byte 3 to 4 (master) or Byte 4 to 5 (slave): Data 1 to 2

Data 1 Bit76543210

I1 0/1

I2 0/1

.. ..

I8 0/1

Data 2 Bit76543210

I9 0/1

I10 0/1

.. ..

I16 0/1

Table 6.15 Telegram Structure

Byte Meaning Value (hex), sent by

Master Slave Master Slave

Attribute ID: Read 88 –

0 Response:

Read successful – C2

Command rejected –

(1)

(1) Possible causes <bullets>a page 45

0 1 Len 02 02

1 2 Type 8C 8C

2 3 Index

00 – 03

(2)

00 – 03

(2)

(2) 00 = Analog input I7

01 = Analog input I8

02 = Analog input I11

03 = Analog input I12

3 4 Data 1 (Low Byte) 00 Table 6.16

4 5 Data 2 (High Byte) 00 Table 6.16

5 – 6 6 – 7 Data 3 – 4 00 00

1 2 ... 48 49 50 51 52 53 54 55 56 57 58 ... 167 168

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Rockwell-automation 1760-DNET Pico DeviceNet Communications Module Use Bedienungsanleitung Seite 53