Rockwell-automation 20-COMM-ER 20-COMM-ER Dual-Port EtherNet/IP Commun Instrukcja Użytkownika Pobierz pdf (Strona 128)

128 Rockwell Automation Publication 20COMM-UM015B-EN-P - July 2013

Chapter 6 Using Explicit Messaging

MicroLogix 1100/1400 Controller Example Ladder Logic Program to Write a

Single Parameter Using Read/Write Parameter Service

A Write Parameter message is used to write to a single parameter. This write

message example writes a value to parameter 140 - [Accel Time 1] in a PowerFlex

7-Class drive.

Figure 57 - Example Ladder Logic to Write a Single Parameter

Important:If the explicit message single write must be written

continuously, use DPI Parameter Object Class code 0x93 and

attribute A (10 decimal; see page 133

). This writes to RAM—

not NVS (EEPROM) memory. This example single write

message using Class code F writes to NVS. Over time,

continuous writes will exceed the EEPROM life cycle and

cause the drive to malfunction.

MicroLogix 1100/1400 Controller – Formatting a Message to Write a Single

Parameter Using Read/Write Parameter Service

Figure 58 - Write Parameter Message Configuration Screens

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