Rockwell Automation 1760-DNET Pico DeviceNet Communications Module User Manual - Manual (Page 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 Bit 7 6 5 4 3 2 1 0
I1 0/1
I2 0/1
.. ..
I8 0/1
Data 2 Bit 7 6 5 4 3 2 1 0
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 –
C0
(1)
(1) Possible causes 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