ProSoft Technology MVI46-PDPMV1 - Manual (Page 115)

MVI46-PDPMV1 ♦ SLC Platform Reference
PROFIBUS DPV1 Master User Manual
ProSoft Technology, Inc. Page 115 of 160
March 25, 2011
6.2.2 Backplane Data Transfer
The MVI46-PDPMV1 module communicates directly over the SLC backplane.
Data is transferred between the module and the SLC processor across the
backplane using the processor's M1 and M0 files.
Data received from PROFIBUS slaves and module status data are copied from
the module's internal memory database into the processor's M1 file by the
module's backplane driver. Ladder logic is then used to copy this data from the
M1 file into SLC data tables, so that it may be more easily used in customer
application process logic.
Process logic is also used to move data from application data tables into the M0
output file to be transferred to the module. The module's firmware program
extracts the data and places it in the module's internal database.
To read data from the module, use the COP instruction to copy data from the
processor’s M1 file to a user data file. To write data to the module, use the COP
instruction to copy data from a user file to the processor’s M0 file.
The M1 and M0 data files are structured to provide movement of:

PROFIBUS DPV0 or V1 Cyclic Input data from PROFIBUS slave devices to
the SLC

PROFIBUS DPV0 or V1 Cyclic Output data from the SLC to PROFIBUS
slave devices

MVI46-PDPMV1 module configuration and status from the module to the
processor

PROFIBUS DPV1 Acyclic requests (Mailbox Messages) from the processor
through the module to PROFIBUS slaves

PROFIBUS DPV1 Acyclic responses (Mailbox Input Messages) from
PROFIBUS slaves through the module to the processor
Note: The sample ladder provided for the MVI46-PDPMV1 module automatically copies the M1 file
to the N11 file. You can edit this instruction so that the M1 data is copied to any suitable file of your
choice.