Rockwell Automation 1760-DNET Pico DeviceNet Communications Module User Manual - Manual (Page 57)

Publication 1760-UM003A-EN-P - September 2005
Application Examples for Pico 6-13
The markers N3, N11 and N16 are set.
Operating hours counters: O1 – O4
The following commands are used to read the logic state of the
operating hours counters O1 – O4.
Table 6.21 The N Markers are Read
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 49
0 1 Len 01 01
1 2 Type
N marker 87 87
2 3 Index 00 00
3 4 Data 1 (Low Byte) 00 04
4 5 Data 2 (Low Byte) 00 84
5 – 6 6 – 7 Data 3 – 4 00 00
Table 6.22 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 page 6-34
0 1 Len 01 01
1 2 Type EF EF
2 3 Index 00 00
3 4 Data 1 (Low Byte) 00 Table 6.23
4 – 6 5 – 7 Data 2 – 4 00 00