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How to Use Function Blocks for Specific Operations
Section
1-4
48
1-4 How to Use Function Blocks for Specific Operations
To perform this specific operation
Perform the following
See page:
Direct exchange of large amounts
of data between the CPU Unit and
function blocks for data exchange
with a PT (Programmable Terminal)
for example
Use the Expanded CPU Unit Terminal
Blocks (Block Models 455 to 458).
Function Block
Reference Manual
Continuous data exchange with the
CPU Unit
Use the CPU Unit Terminal blocks (Block
Models 451 to 454).
3-3 Exchanging Data
with the CPU Unit
Read/write of specified data
(ITEMs) from a CPU Unit (including
a CPU Unit on a networked PC)
whenever necessary
Execute the CMND (DELIVER
COMMAND) instruction in the Step
Ladder Program, and issue the FINS
command (ITEM read/write command).
Continuous data exchange with a
Loop Control Unit at another node
Use Controller Link and the Node
Terminal blocks (Send Terminal to All
Nodes, Receive Terminal from All Nodes),
and execute the Controller Link Data Link
(at any setting).
3-4 Exchanging Data
with CX-Process
Monitor/SCADA
Software and with Other
Nodes
Appendix-2 How to Use
the Node Terminal Block
Continuous monitoring and
manipulation of all ITEM data in
multiple Control blocks (max. 4
blocks) on CX-Process Monitor
Use the Node Terminal blocks (4-Block
Send Terminal to Computer or 1-Block
Send Terminal to Computer).
3-4 Exchanging Data
with CX-Process
Monitorr/SCADA
Software and with Other
Nodes
Appendix-2 How to Use
the Node Terminal Block
Data
Exchange
Reading/writing specific ITEMs for
Control, Operation, and External
Controller Blocks with SCADA
software
Using Receive All Blocks (Block Model
461) and Send All Blocks (Block Model
462) to transfer Loop Control Unit data
using tags created with CX-Process Tool.
3-4 Exchanging Data
with CX-Process
Monitorr/SCADA
Software and with Other
Nodes
Instruction of run start/stop of the
Loop Control Unit (all function
blocks) from the CPU Unit
whenever necessary
Execute the CMND (DELIVER
COMMAND) instruction in the Step
Ladder Program, and issue the FINS
command (ITEM read/write command) to
change ITEM 014 (run/stop command) of
the System Common block. Or, use the
ITEM setting commands (Block Models
171 and 172) to stop ITEM 014 (run/stop
command) of the System Common block.
(In this case, operation cannot be started.)
Note: Operation can also be stopped or
started on CX-Process Tool and
CX-Process Monitor.
Instruction of operation stop/stop
cancellation on individual function
blocks from the CPU Unit whenever
necessary
Execute the CMND (DELIVER
COMMAND) instruction in the Step
Ladder Program, and issue the FINS
command (ITEM read/write command) to
change ITEM 000 (stop block operation
command) of the relevant block.
Note: Arithmetic operation stop/stop
cancel on a relevant block can also
be indicated by monitoring the run
status on CX-Process Tool.
3-2 Description of
Operation (page 84)
Execution of required processing
on the CPU Unit according to run
status (e.g. in RUN mode,
execution error, function block data
error) of the Loop Control Unit
Execute the required processing on the
CPU Unit taking bits 00 to 05 of the nth
leading words of the CPU Bus Unit as the
input conditions.
Run/
Stop
Execution of required processing
on the Loop Control Unit according
to run status (e.g. operation mode,
fatal error, Output OFF) of the CPU
Unit
Execute the required processing on the
Loop Control Unit using the Step Ladder
Program block based upon the CPU Unit
run status of ITEMs 007 to 011 and 013 in
the System Common block.
3-3 Exchanging Data
with the CPU Unit
High-speed
processing
High-speed processing of specific
function blocks
Set the operation cycle of the relevant
function block to a shorter value.
3-2 Description of
Operatio (page 84)