Rockwell Automation 20-COMM-ER 20-COMM-ER Dual-Port EtherNet/IP Communication Adapter User Manual - Manual (Page 116)

116 Rockwell Automation Publication 20COMM-UM015B-EN-P - July 2013
Chapter 6 Using Explicit Messaging
ControlLogix Controller Example Ladder Logic Program to Write Multiple
Parameters, RSLogix 5000 Software, All Versions
A Scattered Write message is used to write to multiple parameters. This write
message example writes the following values to these five parameters.
See DPI Parameter Object on page 198 (Class code 0x93) for parameter
numbering.
Important: See Table 17 on page 106 for limitations of PowerFlex 7-Class
drives when using Class code 0x93 for explicit messaging.
Table 21 - Example Controller Tags to Write Multiple Parameters
Figure 43 - Example Ladder Logic to Write Multiple Parameters
Important: If the explicit message scattered write must be written
continuously, then use a separate explicit message single write
for each parameter using DPI Parameter Object Class code
0x93 and attribute A (10 decimal; see
page 123 ). Attribute A
writes to RAM—not NVS (EEPROM) memory. This example
scattered write message using attribute 0 writes to NVS. Over
time, continuous writes will exceed the EEPROM life cycle and
cause the drive to malfunction.
PowerFlex 7-Class
Drive Parameter
Write Value
141 - [Accel Time 2] 11.1 Sec.
143 - [Decel Time 2] 22.2 Sec.
105 - [Preset Speed 5] 33.3 Hz.
106 - [Preset Speed 6] 44.4 Hz.
107 - [Preset Speed 7] 55.5 Hz.
Operand Controller Tags for Write Multiple Message Data Type
XIC Execute_Scattered_Write_Message BOOL
MSG Scattered_Write_Message MESSAGE