Rockwell-automation 1769-SM2 Compact I/O DSI/Modbus Communication Modu Instrukcja Użytkownika Pobierz pdf (Strona 112)

7-10 CompactLogix Example Ladder Programs

Since CH2 and CH3 ladder routines are similar to the CH1 routine, they

are not provided.

The ladder example provided in this section is based on a 1769-SM2

module in slot 1 with five PowerFlex 4/40 drives connected to CH1 and

to CH2, and one PowerFlex 70 connected to CH3 (Figure 7.4

). The

ladder example demonstrates the following functionality for each

channel’s drives:

• Send a Logic Command to control the drive (for example, start, stop).

• Send a Reference to the drive and receive Feedback from the drive.

• Receive Logic Status information from the drive.

• Write and read parameters.

Explicit messaging (parameter read/write) capability varies between the

RSLogix software packages and controllers:

• Explicit messaging can be used with enhanced CompactLogix

processors, such as the -L31, -L32E, and -L35E.

• CompactLogix -L20 and -L30 processors do NOT have explicit

messaging capability.

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Rockwell-automation 1769-SM2 Compact I/O DSI/Modbus Communication Modu Instrukcja Użytkownika Strona 112