Omron EJ1 - 07-2008, Operation Manual

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73
Allocating Data in the Master Section 4-5
Example of Ladder
Programming
4-5 Allocating Data in the Master
The created allocation data can be allocated in the master using fixed or user-
set allocations.
4-5-1 Fixed Allocations
When fixed allocations are used, the location for allocated data is automati-
cally determined according to the node address of the DeviceNet Communi-
cations Unit.
Note 1. When I/O is allocated from the Configurator, up to 100 words can be allo-
cated in the IN Area and OUT Area, but only up to 64 words can be used
for the IN Area and OUT Area if fixed allocations are used (the maximum
number of words may be even less depending on the DeviceNet Unit and
PLC being used). Consider the number of words that can be used before
allocating data.
2. When fixed allocations are used, each node address is allocated one word.
The node addresses allocated in the words that are allocated to the De-
viceNet Communications Unit cannot be used by other nodes.
4-5-2 User-set Allocations
With user-set allocations, the Configurator can be used to allocate DeviceNet
Communications Unit data anywhere within the specified DeviceNet area.
Note 1. When performing user-set allocations from a DeviceNet Configurator, use
Ver. 2.44 or higher.
2. When the IN Area is divided into two blocks, the total number of words that
can be used for allocating data in the IN Area is still 100 words.
RSET
320000
000000
000000
END(001)
000006
END
MOV(021)
#001B
3202
ASL(025)
0000
3300
#0000
MOV(021)
#0064
3203
3300
#0001
SET
320000
ASL(025)
0000
000001
000010
=
=
Execution
condition
Checking the Output Completed Flags
Checking the Output Completed Flags
CIO 320000 (OUT Enable Bit) is turned OFF.
When bit 00 of CIO 3300 (Output Enable Bit) turns
OFF, CIO 3202 (Write Parameter) is set to
001B hex (allocation number for set point), and
CIO 3203 (Unit 0, ch1 set point) is set to
0064 hex (100
°
C).
The content of CIO 0000 is shifted one bit
to the left.
CIO 320000 (Output Enable Bit) is turned ON.
When CIO 3300 (OUT Enable Bit) is
0001 hex, the content of CIO 0000 is shifted
one bit to the left.