Rockwell Automation MD65 Profibus Communication Card - Manual (Page 55)

Using Explicit Messaging (Parameter Protocol) 7-1
C
HAPTER
7
Using Explicit Messaging
(Parameter Protocol)
Chapter 7 provides information and examples that explain how to
use Explicit Messaging to monitor and configure the module and
connected MD65 drive, as well as other peripherals.
7.1 About Explicit Messaging
Explicit Messaging is used to transfer data that does not require
continuous updates. With Explicit Messaging, you can configure
and monitor a slave device’s parameters on the PROFIBUS
network.
To be able to use the parameter protocols in the PROFIBUS
module, the Parameter Access module must be added to the
master configuration when configuring the network.
!
ATTENTION: The examples in this publication are
intended solely for purposes of example. There are
many variables and requirements with any
application. Rockwell Automation does not assume
responsibility or liability (to include intellectual
property liability) for actual use of the examples
shown in this publication. Failure to observe this
precaution could result in bodily injury or damage to
equipment.
ATTENTION: If Explicit Messages are programmed
to write parameter data to Non-Volatile Storage
(NVS) frequently, the NVS will quickly exceed its life
cycle and cause the drive to malfunction. Do not
create a program that frequently uses Explicit
Messages to write parameter data to NVS. Datalinks
do not write to NVS and should be used for frequently
changed parameters. Failure to observe this
precaution could result in damage to, or destruction
of, equipment.