Ladder Logic
MVI46-S3964R
♦
SLC Platform
Siemens 3964R Protocol
ProSoft Technology, Inc.
Page 29 of 74
3 Ladder
Logic
In This Chapter
Introduction............................................................................................ 29
Commands ............................................................................................ 30
Ladder logic is required for application of the MVI46-S3964R module. Tasks that
must be handled by the ladder logic are module data transfer, special block
handling and status data receipt. Additionally, a power-up handler may be
needed to handle the initialization of the module's data and to clear any
processor fault conditions.
The sample ladder logic, on the ProSoft Solutions CD-ROM, is extensively
commented, to provide information on the purpose and function of each rung. For
most applications, the sample ladder will work without modification.
3.1 Introduction
The example programs mentioned in the following paragraphs illustrate the
principle of how to communicate between an MVI46-S3964R and a SLC
processor. All programs mentioned were tested with appropriate communication
partners.
It is up to the programmer to examine the programs in detail and integrate them
into the SLC processor application.
The following setups/limitations are to be observed in the example
programs:
Changes according to the requirements of your SLC system are recommended
for setups only. Limitations must not be changed.
Setup:
The MVI46-S3964R resides in slot 1 of the SLC chassis.
Setup:
The 1747-L series controller resides in slot 0 of the SLC chassis.
ATTENTION: You must be trained in programming and operating Rockwell
Automation 1747-L series controllers and SLC environment. Otherwise, incorrect
use may lead to personal injury or death, property damages or economic loss.
3.1.1 Explanations
About the Example Programs
MVI46_3964R.RSS
is the general S3964R communication program used for the
following types of 3964R jobs:
April 17, 2008
