Rockwell Automation 1785-Lx0C15 ControlNet PLC-5 Programmable Controllers User Manual - Manual (Page 56)

1785-UM022C-EN-P - February 2008
2-18 Planning to Use Your ControlNet PLC-5 Processor
Supported ControlNet I/O Sizes
The following table shows the maximum I/O map entries allowed in
the ControlNet I/O map table:
Table 2.D Maximum I/O Map Entries
Each map-table entry corresponds to one transfer—input only, output
only, or both input and output—of data between the ControlNet
processor and an I/O rack, an I/O module, or another ControlNet
processor.
Table 2.E Files That You Configure with the I/O Map for Scheduled I/O Usage
Processor:
Number of
Mappings: Number of DIF
Files:
Number of DIF
Words:
Number of DOF
Files:
Number of DOF
Words:
PLC-5/20C15 64 2 2000 2 2000
PLC-5/40C15 96 3 3000 3 3000
PLC-5/46C15 96 3 3000 3 3000
PLC-5/80C15 128 4 4000 4 4000
File Description
ControlNet Status File User-specified integer data table file containing status information about this processor’s scheduled I/O
map-table entries. Each I/O map table entry has a status-file offset field pointing to three status words
associated with that entry. Refer to Appendix D for more information on I/O map-table entry status words.
ControlNet Diagnostics File User-specified integer data table file containing diagnostics about the ControlNet network (not required).
See Appendix F.
Data Input File (DIF) User-specified integer data-table file with a maximum of:
• 2000 words for the PLC-5/20C processor (spanning two contiguous data table files)
• 3000 words for the PLC-5/40C processor (spanning three contiguous data table files)
• 3000 words for the PLC-5/46C processor (spanning three contiguous data table files)
• 4000 words for the PLC-5/80C processor (spanning four contiguous data table files)
This file is typically used for non-discrete input data and peer-to-peer input. Discrete input data may be
mapped to DIF as well.
Data Output File (DOF) User-specified integer data-table file with a maximum of:
• 2000 words for the PLC-5/20C processor (spanning two contiguous data table files)
• 3000 words for the PLC-5/40C processor (spanning three contiguous data table files)
• 3000 words for the PLC-5/46C processor (spanning three contiguous data table files)
• 4000 words for the PLC-5/80C processor (spanning four contiguous data table files)
This file is typically used for non-discrete output data and peer-to-peer output. Discrete output data may
be mapped to DOF as well.
Configuration File User-specified integer data-table file used to store non-discrete I/O data transfer configuration data. This
configuration data is sent to the target device each time the connection is opened.