Rockwell Automation 25B PowerFlex 525 Embedded EtherNet/IP Adapter - Manual (Page 76)

76 Rockwell Automation Publication 520COM-UM001B-EN-E - March 2013
Chapter 6 Using Explicit Messaging
CompactLogix Example Scattered Read Request Data
In this message example, we use the data structure in Figure 101 in the source tag
named Scattered Read Request to read these five 16-bit parameters in a
PowerFlex 525 drive:
• Parameter b001 [Output Freq]
• Parameter b003 [Output Current]
• Parameter b004 [Output Voltage]
• Parameter b005 [DC Bus Voltage]
• Parameter b017 [Output Power]
Example Scattered Read Request Data
CompactLogix Example Scattered Read Response Data
The Scattered Read Request message reads the multiple parameters and returns
their values to the destination tag (Scattered_Read_Response).
Example
Scattered Read Response Converted Data on page 76 shows the parameter
values.
Example Scattered Read Response Converted Data
In this message example, the parameters have the following values:
(4) In this example, we are reading five 16-bit parameters. Each parameter being read requires two contiguous INT registers. Therefore,
a controller tag was created with its Data Type field set to “INT[10].” Also, the Source Length field on the Message Configuration
screen must correspond to the selected Data Type in bytes (for this example, 20 bytes for an INT[10] array). Scattered read messages
always assume that every parameter being read is a16-bit parameter, regardless of its actual size. Maximum message length is 256
bytes which can read up to 64 parameters, regardless of their size.
(5) The controller tag for “Scattered_Read_Response” must be the same size as the controller tag for “Scattered_Read_Request” (for
this example, 20 bytes), but can be a different data type.
PowerFlex 525 Drive Parameters Read Value
b001 [Output Freq] 50.00 Hz
b003 [Output Current] 0.01 Amp (No load)
b004 [Output Voltage] 179.6V AC
b005 [DC Bus Voltage] 349V DC
b017 [Output Power] 0 kW (No load)