Rockwell Automation 20-COMM-Q ControlNet Adapter - Manual (Page 136)

6-8 Using Explicit Messaging
20-COMM-C/Q ControlNet Adapter User Manual
Publication 20COMM-UM003F-EN-P
Write a Single Parameter
ControlLogix Controller Example Ladder Logic Program to Write a Single Parameter
Using RSLogix 5000 Software, Version 15.00 or Later
A Parameter Write 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.
Important: Parameter Object Class code 0x0F is not supported in
PowerFlex 750-Series drives. To do a single parameter write,
follow the RSLogix 5000 software (any version) single write
example on
page 6-10 .
Table 6.D Example Controller Tags to Write a Single Parameter
Figure 6.6 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 or
Host DPI Parameter Object Class code 0x9F and attribute A (10
decimal; see
page 6-11 ). 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.
Operand Controller Tags for Single Write Message Data Type
XIC Execute_Single_Write_Message BOOL
MSG Single_Write_Message MESSAGE