Rockwell Automation 25-COMM-D PowerFlex 525 DeviceNet Adapter - Manual (Page 82)

82 Rockwell Automation Publication 520COM-UM002A-EN-E - April 2013
Chapter 7 Using Multi-Drive Mode
Multi-Drive Mode Explicit
Messaging Parameter addressing for Explicit messaging is different in Multi-drive than with
Single-drive mode. In Single-drive 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 five drives.
The parameters in the adapter and each of the drives are offset by 400 hex (1024
decimal):
For example, to access [Accel Time 1] (parameter P041 in PowerFlex 525 and
P109 in PowerFlex 4M) in each of the drives, the following Instances would be
used:
• Drive 0 (PowerFlex 525) Instance = 17449 (17408 + 41)
• Drive 1 (PowerFlex 4M) Instance = 18541 (18432 + 109)
• Drive 2 (PowerFlex 4M) Instance = 19565 (19456 + 109)
• Drive 3 (PowerFlex 4M) Instance = 20589 (20480 + 109)
• Drive 4 (PowerFlex 4M) Instance = 21613 (21504 + 109)
Drive 1 Explicit Message Example
The Explicit message examples in the ControlLogix example program perform a
read and a write to PowerFlex 4M parameter P109 [Accel Time 1]. The
configuration for the read is shown in
Parameter Read Message Configuration on
page 83 and the write is shown in Parameter Write Message Configuration on
page 83 .
Instance (Hex.) Instance (Dec.) Device Parameter
0x0000...0x3FFF 0...16383 DeviceNet Adapter parameters 0...1023
0x4000...0x43FF 16384...17407 DeviceNet Adapter parameters 0...1023
0x4400...0x47FF 17408...18431 Drive 0 0...1023
0x4800...0x4BFF 18432...19455 Drive 1 0...1023
0x4C00...0x4FFF 19456...20479 Drive 2 0...1023
0x5000...0x53FF 20480...21503 Drive 3 0...1023
0x5400...0x57FF 21504...22527 Drive 4 0...1023
0x5800...0x5BFF 22528...23551 DeviceNet Adapter parameters 0...1023