Omron E5ZN-DRT, Operation Manual

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Allocation Method Overview Section 4-1
4-1-2 Allocation Procedure
Follow the two steps below to allocate I/O for remote communications
between the master and DeviceNet Communications Unit.
Step 1: Set the Slaves
Set in the DeviceNet Communications Unit which Temperature Controller data
or DeviceNet Communications Unit data to allocate in the Master. Use either
of the following two methods (1 or 2) to set the data allocation method.
Note 1. When the Configurator is used to allocate I/O, and the master is a CS/CJ-
series DeviceNet Unit, the IN Area can be divided into two areas (IN Area
1 and IN Area 2). Any allocation data from the list of parameters can be
selected and allocated in each area. (For example, operation data and sta-
tus data can be separated and allocated into different locations.) To use
this function, however, set two connection methods between the master
and DeviceNet Communications Unit under User Setup in the Edit Device
Parameters Window for the master. For details, refer to Setting Connec-
tions when Dividing IN Area in Two under 4-4-2 User-set Allocations.
2. The size of allocated data is determined according to the allocation meth-
od used, as shown in the following table.
Step 2: Allocate Data
in the Master
Specify the I/O memory of the master (CPU Unit) to allocate for the data
determined in step 1. Whether the setting for allocating data in the master is
set to simple I/O allocation or allocation from the Configurator, either of the fol-
lowing two methods can be used.
• Fixed allocations
• User-set allocations
Method for setting
allocation data
Rear panel DIP
switch pin 1
Contents Applications
1) Simple I/O allo-
cation
ON The predetermined set of
parameters is automati-
cally set. Used to allocate in the master basic data only, such
as the Temperature Controller SPs, PVs, and alarm
outputs.
2) I/O allocations
from the Configu-
rator
OFF The Configurator is used
to select any data for allo-
cating in the master from
the list of parameters. • Used to allocate parameters and statuses in the
master other than the Temperature Controller SPs,
PVs, and alarm outputs.
• Used to allocate data in any order.
• Used to allocate in the master only the data that is
always required for remote I/O communications,
without allocating data that is not required.
• To divide the IN Area into two areas for allocating
data (see note 1).
Setting
method
Number of
allocated blocks
Size of allocated data
Simple I/O
allocation IN Area: 1 block
OUT Area: 1 block
IN Area: 16 to 46 words (32 to 92 bytes)
(= 16 + n × 2 words)
OUT Area: 8 to 38 words (16 to 76 bytes)
(= 8 + n × 2 words)
n: The highest unit number of the con-
nected Temperature Controllers (0 to 15)
set with the DeviceNet Unit's rear panel
rotary switch.
I/O allocations
from the Con-
figurator IN Area: 1 or 2
blocks
OUT Area: 1 block
IN Area: 0 to 100 words (0 to 200 bytes)
OUT Area: 0 to 100 words (0 to 200 bytes)
(Depends on the quantity of allocation data
selected.)