Rockwell Automation 1760-DNET Pico DeviceNet Communications Module User Manual - Manual (Page 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,
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 –
0 Answer
Read successful – C2
Write successful – C1
Command rejected – C0
0 1 Len 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 00
5 – 6 6 – 7 Data 3 – 4 00 00