Rockwell-automation 20-COMM-ER 20-COMM-ER Dual-Port EtherNet/IP Commun Manual de usuario descargar pdf (Pagina 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

1 2 ... 111 112 113 114 115 116 117 118 119 120 121 ... 237 238

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Rockwell-automation 20-COMM-ER 20-COMM-ER Dual-Port EtherNet/IP Commun Manual de usuario Pagina 116