Rockwell Automation 1760-DNET Pico DeviceNet Communications Module User Manual - Manual (Page 55)

Publication 1760-UM003A-EN-P - September 2005
Application Examples for Pico 6-11
Read marker: M1 – M16/N1 – N16
Unlike the write operation, the marker read operation reads the entire
marker area of a particular marker type (M or N) is read.
Command rejected –
C0
(3)
0 1 Len 01 01
1 2
Type
(1)
With M marker 86 86
With N marker 87 87
2 3
Index
2 00 – 0F 00 – 0F
3 4
Data 1 (Low Byte) (2) 00/01 00/01
4 – 6 5 – 7 Data 2 – 4 00 00
(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.
(2) The marker is set if a value is written to the data byte that does not equal zero. The marker is reset accordingly
if the value 0 is written to data byte Data 1.
(3) Possible causes page 6-34
Table 6.18 Marker M13 is Set
Byte Meaning Value (hex), sent by
Master Slave Master Slave
Attribute ID: Write 8C –
0 Response:
Write successful – C1
Command rejected –
C0
(1)
(1) Possible causes page 6-49
0 1 Len 01 01
1 2 Type
M marker 86 86
2 3 Index 0C 0C
3 4 Data 1 01 00
4 – 6 5 – 7 Data 2 – 4 00 00
Table 6.17 Telegram Structure
Byte Meaning Value (hex), sent by
Master Slave Master Slave