Rockwell Automation MD65 EtherNet/IP Communication Module - Manual (Page 87)

Using Multi-Drive Mode 8-23
The Class Code is “f” for the Parameter Object and the Instance
Attribute is “1” to select retrieving the parameter value. (See
Appendix C for more information.) The Instance value is “17441” to
access parameter 39 (Accel Time 1).
The Explicit messages for Drive 1 to Drive 4 are identical except for
the Instance values:
Drive 1 Instance = 18471 (18432 + 39)
Drive 2 Instance = 19495 (19456 + 39)
Drive 3 Instance = 20519 (20480 + 39)
Drive 4 Instance = 21543 (21504 + 39)
Figure 8.13 – Parameter Write Message Configuration