Rockwell Automation 1404-M4_M5_M6_M8 Powermonitor 3000 User Manual, Firmware rev. 3.0 or LATER - Manual (Page 306)

306 Publication 1404-UM001F-EN-P - November 2009
Appendix C Sample Applications
A command byte of 1 is used first to start the explicit message. After a
response has been received from the scanner, a command byte of 4 is
used to remove this transaction from the scanner. If the command
byte of 4 is not written to the SLC 500 DeviceNet Scanner, then it does
not process further transactions.
Word M0:1.225
A port number and transaction body size is needed for this word. The
port number is the DeviceNet scanner port that handles this
transaction; an SLC 500 controller uses port 0 and the PLC-5 controller
uses port 0 or 1. The size is the number of bytes (2 bytes = 1 word) in
the transaction body which is 6 (6 bytes = 3 words).
Word M0:1.226
A service code and MAC ID is needed for this word. The service code
is the DeviceNet network service that can be used on the Class 4
assembly instances; these are the valid service codes.
•
14 = Get_Attributes_Single
•
16 = Set_Attributes_Single
Word M0:1.224
TXID Cmd
TXID x 256 + Cmd
20 x 256 + 1
5121
Word M0:1.225
Port Size
Port x 256 + Size
0 x 256 + 6
6