Exchanging Data With Scada Software - Omron CS1W-LC001 Operation Manual

Exchanging Data with CX-Process Monitor/SCADA Software and with Other Nodes Section
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Exchanging Data with SCADA Software

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5) CX-Process Monitor specifies the tag number from this area to read data
via the Data Link.
For details on how to use the Node Terminals that use the Controller Link
Data Link, see Appendix 2 How to Use the Node Terminal Block.
For details on data exchange between CX-Process Monitor and the Loop
Control Unit, see CX-Process Monitor Operation Manual.
Loop Control Unit
Node Terminal block
At each
operation
cycle
Control block
PID etc.
To read Loop Control Unit function block data using SCADA software, the
Send All Blocks function block (block model 462) is used to transfer specific
ITEMs in Control Blocks, Operation Blocks, and External Controller Blocks to
specified words in I/O memory in the CPU Unit. CSV tags (tags that can be
created with the CX-Process Tool) are then used to specify ITEMs so that
SCADA software be used read the ITEM data from the I/O memory of the
CPU Unit.
To write Loop Control Unit function block data using SCADA software, CSV
tags are then to specify ITEMs so that SCADA software can be used to write
data to words to the I/O memory of the CPU Unit. The Receive All Blocks
function block (model 461) is then used to transfer specific ITEMs in Control
Blocks, Operation Blocks, and External Controller Blocks from the specified
words in I/O memory to the Loop Control Unit.
For items that are not handled by the Send All Blocks function block and
Receive All Blocks function block, an Expanded CPU Unit Terminal function
block is used to read and write ITEM data in the same way, again using CSV
tags.
CX-Process Monitor
CPU Unit
Data Memory (D)
for Node Terminal
Area to send to
Sending of data
computer
for CX-Process
Monitor
Set Point change
and other
operations
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