Rockwell Automation 1757-ABRIO Process Remote I/O (RIO) Communication Interface Module - Manual (Page 146)

144 Publication 1757-UM007D-EN-P - December 2008
Appendix B Operational Comparison Between the 1757-ABRIO Module and a PLC-5 System
. Equivalent Modes
1757-ABRIO
Module PLC-5
Controller Description
ACTIVE Run Data is transferred and diagnostics are
enabled.
INACTIVE Program Inputs are updated and outputs are treated the
same as PLC-5 Program mode.
CONFIG Program Inputs are held and outputs are treated the
same as PLC-5 Program mode.
FORCED ACTIVE Inputs are updated and outputs are set by the
user through AbRioCfg software.
TIP
Any data “read tag” refers to data being read by a controller.
Any data “write tag” refers to data being written by a controller.
Normal Operational Comparison Between a PLC-5 System and a 1757-ABRIO Module
1757-ABRIO ACTIVE or
PLC-5 RUN Modes From the PLC-5 Perspective From the 1757-ABRIO Perspective
Digital inputs Digital output data updates. Data update in the
PLC data table is asynchronous to the I/O update,
based on the PLC I/O scan. Digital input data updates (in the 1757-ABRIO
module) based on the scan list. Data updates by the
controller asynchronously when the tag is read by the
controller.
Digital outputs Digital input data updates. Data update in the PLC
data table is asynchronous to the I/O update,
based on the PLC I/O scan. Digital output data updates (in the 1757-ABRIO
module) based on the scan list. Data updates by the
controller asynchronously when the tag is read by the
controller.
Block transfer read data Updates when the block transfer instruction
executes. Block transfers to the local rack are
faster than block transfers to the 1757-ABRIO
module. Updates the 1757-ABRIO module tag when the block
transfer cycle executes based on the scan list and
user configured Block Transfer Update time. Updates
in the controller when the tag data is exchanged.
Block transfer write data Updates on the module when the block transfer
instruction executes. Block transfers to the local
rack are faster than block transfers to 1757-ABRIO
module. Updates on the 1757-ABRIO module when the control
process exchanges data. Updates on the module
when the block transfer cycle executes.
1757-ABRIO INACTIVE and
or PLC-5 Program Mode From the PLC-5 Perspective From the 1757-ABRIO Perspective
Digital inputs Digital input data updates. Data update in the PLC
data table is asynchronous to the I/O update. Digital input data updates in the 1757-ABRIO module.
Data does not update in the host controller since tags
are not being read.
Digital outputs Digital output data does not update. Digital output data does not update.
Block transfer read data Block transfers do not execute. Block transfers do not execute.
Block transfer write data Block transfers do not execute. Block transfers do not execute.