ProSoft Technology MVI56-PDPMV1 - Manual (Page 38)

Start Here MVI56-PDPMV1 ♦ ControlLogix Platform
User Manual PROFIBUS DPV1 Master
Page 38 of 255 ProSoft Technology, Inc.
March 22, 2011
1.7.2 FLEX Sample Add-On Instruction Import Procedure
Note: This section applies only if the MVI56-PDPMV1 firmware version is 1.21 (or later) AND
configured in FLEX mode (U
SE L EGACY M ODE = N O )
Before You Begin
The following file is required before you start this procedure. Copy the file from
the ProSoft Solutions CD-ROM, or download it from
www.prosoft-technology.com.
File Name Description
PS56PDPMV1_FLEX_v*.L5X
(where * is the current sample
program version number)
L5X file containing Add-On Instruction, user-defined data types,
controller tags, and ladder logic required to set up the MVI56-
PDPMV1 module
Flexible Connection I/O Length Overview
This section describes the flexible backplane connection I/O concept.
The connection parameters may assume values within the following ranges:
Minimum Size
(16-bit) Maximum Size (16-
bit) Maximum PROFIBUS data count per
block (16-bit) Assembly
Instance
Input 12 250 [input size - 8] 1
Output 5 248 [bp output size - 5] 2
Configuration 0 0 not used 4
For applications where the module will be used in the local rack (the same rack
as the ControlLogix processor), use the maximum backplane I/O sizes.
For applications where the module will be used in a remote rack, use the
backplane I/O sizes that will provide optimal network performance (PROFIBUS
and ControlNet or EtherNet/IP).
The configured sizes will have an impact on the number of blocks required to
transfer the entire PROFIBUS I/O database between the ControlLogix processor
and the MVI56-PDPMV1 module. Reducing the number of words per backplane
block may improve the ControlNet or EtherNet/IP network performance.
However, doing so will increase the number of backplane block transfers and
have a negative effect on overall backplane data transfer efficiency.