Rockwell-automation 1760-DNET Pico DeviceNet Communications Module Use Manual de usuario descargar pdf (Pagina 96)

Publication 1760-UM003A-EN-P - September 2005

7-16 Pico GFX Control Commands

Local analog output: QA1

The commands provided can be used to access the local analog

output of the Pico GFX or GFX basic unit. When writing to the analog

output (only possible from Pico GFX, device version 04) the value will

only be output if the respective device is in RUN mode and if the

respective image is not written by the actual program,

<bullets>a section “Read/write image data”on page 7.

Example:

The analog output should output a value of approx. 5 V.

500 = 01F4

hex

Byte 4 – Data 1 (LowByte) : F4

hex

Byte 5 – Data 2 (HighByte): 01

hex

Table 6.91

Byte Meaning Value (hex), sent by

Master Slave Master Slave

Attribute ID

Read 91 –

Write

(1)

(1) Writing is only possible from Pico GFX, version 0.4, see page 7-2.

B1 –

0Answer

Read successful – C2

Write successful – C1

Command rejected – C0

01Len 02 02

1 2 Type 05 05

2 3 Index 00 00

3 – 4 4 – 5 Data 1 – 2

Read operation 00 see example

below

Write operation see example

below

5 – 6 6 – 7 Data 3 – 4 00 00

1 2 ... 91 92 93 94 95 96 97 98 99 100 101 ... 167 168

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Rockwell-automation 1760-DNET Pico DeviceNet Communications Module Use Manual de usuario Pagina 96