Rockwell Automation 1760-DNET Pico DeviceNet Communications Module User Manual - Manual (Page 56)

Publication 1760-UM003A-EN-P - September 2005
6-12 Application Examples for Pico
Table 6.19 Telegram Structure
Byte Meaning Value (hex), sent by
Master Slave Master Slave
Attribute ID: Read 88 –
0 Response:
Read successful – C2
Command rejected –
C0
(2)
(2) Possible causes page 6-34
0 1 Len 01 01
1 2 Type
M marker 86 86
N marker 87 87
2 3
Index
(1)
(1) There are 16 M markers and 16 N markers. The markers are addressed by Type and Index: Use Type to select
the M or N marker. Use Index to select the marker number
00 00
3 4 Data 1 (Low Byte) 00 Table 6.20
4 5 Data 2 (Low Byte) 00 Table 6.20
5 – 6 6 – 7 Data 3 – 4 00 00
Table 6.20 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
m N
M1 N1 0/1
M2 N2 0/1
... ... ...
M8 N8 0/1
Data 2 Bit 7 6 5 4 3 2 1 0
M9 N9 0/1
M10 N10 0/1
... – ...
M16 N16 0/1