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