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5-12
MicroLogix 1500 Ladder Example Program
Parameter Read/Write Example
In this example, a read and a write of PowerFlex 70 drive parameter 101
- [Preset Speed 1] is being performed.
The Message Configuration screen in RSLogix 500 for the message
doing the read operation is shown in
Figure
5.6. It is assumed that the
1769-SM1 occupies slot number 1, and that the PowerFlex 70 drive is
connected to the 1769-SM1 channel 1.
Refer to
Table 5.A on page 5-11
for a description of the content in each
box.
Figure 5.6 RSLogix 500 Parameter Read Message Configuration Screen
The response data for the message is stored at Data Table Address N7:0.
The Size in Bytes of the response data is 2 bytes because the data size for
PowerFlex 70 drive parameter 101 - [Preset Speed 1] is 2 bytes (1 word).
No Data Table Address is specified for the request data since the Read
Parameter service has no request data.
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