Rockwell Automation Publication 750COM-UM009A-EN-P - May 2017 103
Using Explicit Messaging Chapter 5
Ladder Logic Program to Read Multiple Parameters
A Scattered Read message is used to read the values of multiple parameters.
This read message example reads the values of these floating point parameters
(five 32-bit REAL) in a PowerFlex 755T drive:
• 10:001 - [Output Frequency]
• 10:003 - [Output Current]
• 10:002 - [Output Voltage]
• 10:004 - [Output Power]
• 0:003 - [DC Bus Volts]
See DPI Parameter Object on page 145
(Class code 0x93) or Host DPI
Parameter Object on page 163 (Class code 0x9F) for parameter numbering.
Table 12 - Example Controller Tags to Read Multiple Parameters
Figure 23 - Example Ladder Logic to Read Multiple Parameters
Operand Controller Tags for Scattered Read Message Data Type
XIC Execute_Scattered_Read_Message BOOL
MSG Scattered_Read_Message MESSAGE
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