User guide

Using Multi-Drive Mode

8-7

Important: MDCOMM-ENET parameters can be set using MDI

peripheral (OIM) ONLY when the Operating Mode

Switch is in the Single

8.5 Example Multi-Drive Ladder Logic

Program

The ladder logic program example demonstrates using Multi-Drive

mode with five drives. See figure 8.2 for a system layout diagram.

8.5.1 Function of Example Program

The example program provided is for the ControlLogix, but other

controllers can also be used. This example program enables you to:

• View status information from the drives such as Ready, Fault, At

Speed, and Feedback.

• Control the drives using various Logic Command bits (Stop, Start,

etc.) and Reference.

• Perform a single parameter read and write for each drive. The

example uses drive parameter 39 (Accel Time) for both so you

can see (read) the change after a write is performed.

8.5.2 Module Settings for the Example Program

• The Operating Mode Switch (SW1) on the module is set to the

Multi-Drive operation position. Table 8.4 shows the module

parameter settings.

Table 8.4 – Module Parameter Settings

Parameter Value Description

22 (MDI I/O Cfg) 4 “Drives 0-4” - 5 drives on 1 node

24 (Drv 0 Addr)

The settings for these parameters must match the Parameter A104

(Comm Node Addr) settings in the respective drives.

1 Modbus address of Drive 0

25 (Drv 1 Addr)

2 Modbus address of Drive 1

26 (Drv 2 Addr)

3 Modbus address of Drive 2

27 (Drv 3 Addr)

4 Modbus address of Drive 3

28 (Drv 4 Addr)

5 Modbus address of Drive 4