Rockwell Automation 1336-GM6 Enhanced DeviceNet Communications Module - Manual (Page 80)

7-10 Using DeviceNet Explicit Messaging
The following table display data sent to and received from the
scanner. Values are in hexadecimal.
In this example, there were four entries in the fault queue. Notice the
following about the data:
Refer to Appendix C, DeviceNet Objects, for more information on
object descriptions.
Using Messages to Control
SCANport Products Explicit messages provide multi-purpose, point-to-point
communication paths between two devices. It is possible to control
SCANport devices through explicit messaging on DeviceNet by
following particular guidelines and by writing to various register
objects that are buffering the I/O data. The guidelines are as follows:
• The adapter cannot be allocated by a master/scanner in order to
allow explicit writes to the register object.
Offset 0 1 2 3 4 5 6 7 8 9
N20:0 4 0 0 0 0 0 0 0 0 0
N20:10 201 6 E02 97 0 1 0 0 0 0
N20:20 0 0 0 0 0 0 0 0 0 0
N20:30 0 0 0 0 0 0 0 0 0 0
N20:40 0 0 0 0 0 0 0 0 0 0
N20:50 201 6 8E02 4 0 0 0 0 0 0
N20:60 0 0 0 0 0 0 0 0 0 0
N20:70 0 0 0 0 0 0 0 0 0 0
N20:80 0 0
Location Value Meaning
N20:10 0x0201 TXID of 2. Command 1 (Execute)
N20:11 0x0006 Port 0. Size = 6 bytes (N30:3 – 5)
N20:12 0x0E03 Service E (Get Attribute Single) Node 3
N20:13 0x0097 SCANport Pass-Through Fault Object
N20:14 0x0000 Instance 0 (Class Access)
N20:15 0x0001 Attribute 1 (Number of Fault Queues)
N20:50 0x0201 TXID of 2. Status 1 (Success)
N20:51 0x0006 Port 0. Size = 6 bytes (N30:3 – 5)
N20:52 0x8E03 Service 8E (Get Attribute Single Response)
N20:53 0x0004 4 fault queues