Rockwell-automation 1769-SM2 Compact I/O DSI/Modbus Communication Modu Instrukcja Użytkownika Pobierz pdf (Strona 71)

Understanding Explicit Messaging 5-7

RSLogix 5000 Parameter Read/Write Examples

In this example, a read and a write of PowerFlex 40 drive Parameter 78

- [Jog Frequency] is being done.

The RSLogix 5000 Message Configuration example screen to read a

parameter is shown in Figure 5.5

. It is assumed that the 1769-SM2

module occupies slot 1 and is operated in Single mode, and that the drive

is connected to CH1.

See Table 5.B

for descriptions of the message configuration data.

Figure 5.5 RSLogix 5000 Example Message Setup Screen to Read a Parameter

The response data for the message is stored in CH1_Read_Value. The

“Get Attribute Single” Service Type (Service Code “e”) is used to read a

single parameter. Class “f” refers to the CIP Parameter Object on

page C-4 and Instance “78” is drive Parameter 78 - [Jog Frequency].

Instance Attribute “1” is the parameter value.

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Rockwell-automation 1769-SM2 Compact I/O DSI/Modbus Communication Modu Instrukcja Użytkownika Strona 71