Multi-Drive Mode Explicit Messaging - Allen-Bradley 22-COMM-E FRN 1.xxx User Manual

7-20 Using Multi-Drive Mode
Figure 7.11 Drive 4 Control Routine (Continued)

Multi-Drive Mode Explicit Messaging

Parameter addressing for Explicit messaging is different in Multi-Drive
than with Single mode. In Single mode, the Instance value in the
message equals the desired parameter number in the drive. In
Multi-Drive mode, an Instance table is used to account for the
parameters in the adapter and up to 5 drives. The parameters in the
adapter and each of the drives are offset by 400 hex (1024 decimal):
Instance (Hex.)
4000 - 43FF
4400 - 47FF
4800 - 4BFF
4C00 - 4FFF
5000 - 53FF
5400 - 57FF
For example, to access Parameter P39 - [Accel Time 1] in each of the
drives, the following Instances would be used:
Drive 0 Instance = 17447 (17408 + 39)
Drive 1 Instance = 18471 (18432 + 39)
Drive 2 Instance = 19495 (19456 + 39)
Drive 3 Instance = 20519 (20480 + 39)
Drive 4 Instance = 21543 (21504 + 39)
(Dec.) Device
16384 - 17407 22-COMM-E
17408 - 18431 Drive 0
18432 - 19455 Drive 1
19456 - 20479 Drive 2
20480 - 21503 Drive 3
21504 - 22527 Drive 4
Parameter
0 - 1023
0 - 1023
0 - 1023
0 - 1023
0 - 1023
0 - 1023