Local analog inputs: ia1 – ia4 – Rockwell Automation 1760-DNET Pico DeviceNet Communications Module User Manual User 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 <bullets>a page 45
0
1
Len
02
02
1
2
Type
8C
8C
2
3
Index
00 – 03
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
4
5
Data 2 (High Byte)
00
5 – 6
6 – 7
Data 3 – 4
00
00