Rockwell Automation 1404-M4_M5_M6_M8 Powermonitor 3000 User Manual, Firmware rev. 3.0 or LATER - Manual (Page 321)

Publication 1404-UM001F-EN-P - November 2009 321
Sample Applications Appendix C
N7 SCNR_FILE
The following items are of importance in file N7:0.
While other words in the N7 SCNR_FILE are important to
communication these values are copied from file N9 CIP_SETUP to file
N7.
N9 CIP_SETUP
This file is the CIP message setup file. The importance of the
following words should be noted.
File N7:0
Bit # Importance N7:0 Read/Write
N7:0/15 EN - Written to by the ladder to enable
communication transaction. R/W
N7:0/14 Unused N/A
N7:0/13 DN bit - Response received R
N7:0/12 ER bit - Error bit returned form SCNR
scanner R
N7:0/11 CO - Continuous mode Not used N/A
N7:0/10 EW - Message taken into account by
1747 - SCNR scanner R
N7:0/9 SUCCESS - Used by ladder for notification
of successful communication transfer. R
N7:0/8 TO - The message transaction has timed
out. R
N9 CIP
Word
# Description of Function
N9:0 Not used by CIP_SETUP.
N9:1 Target MAC ID (Power monitor MAC ID)
N9:2 Communication transaction timeout setting in ms. (2048 recommended)
N9:3 Complex IOI size. Not used and set to 0.
N9:4 Service code. 0xE for Get Attribute Single or 0x10 Set Attribute single.
N9:5 Class code of Instance Object. Power monitor class 4 assembly instance.(4)