Omron SmartSlice GRT1 Series Operation Manual page 32

Unit Numbers and I/O Allocations
I/O Allocation
Example
Input area
Word
15 8
Communications Unit status
First word
Unused #3 #2
+1
+2
#4
+3
Some areas may be unused
when data is allocated.
Note
Allocated Data
Patterns
Data Allocated in Master
Note
I/O data is allocated to the I/O Units in the order that they are connected to the
Communications Unit, regardless of the I/O Units' models. Unless special
allocation data settings are selected with the Communications Unit's Pro-
gramming Device, data is allocated from the first word starting with the Com-
munications Unit's status flags and then the leftmost I/O Unit's data.
Data in the Master's input and output areas is allocated to the Slice I/O Units
based on their unit numbers.
#1 #2
Communi-
ID4 ID4
cations
Unit
0
#1
I/O Units with bit allocations (such as the GRT1-ID4/OD4) are allocated data
in 2-bit units. I/O Units with word allocation (such as the GRT1-AD2) are allo-
cated data in 1-word units. The following example shows the allocations to
Output Units.
#1
Communi-
OD4
cations
Unit
15
Word
+0
+1
+2
+3
The following kinds of data can be allocated in the Master. The Programming
Device can be used to freely select the kinds/combination of data allocated. If
the Programming Device isn't used to select the data pattern, the default set-
ting is used, which is I/O data + Communications Unit status flags (pattern
number 1 in the following table).
1 I/O data (inputs) + Communications Unit status flags
2 I/O data (inputs and outputs) only
3 Communications Unit status flags only
4 Slice I/O Unit Communications Participating/Withdrawn Flags only
The Communications Unit's status flags and Slice I/O Units' Communications
Participating/Withdrawn Flags cannot be allocated in the output area.
#3 #4 #5 #6
ID4 AD2 OD4 ROS2
Slice I/O Terminal configuration
#2 #3 #4
OD4 OD4 2
ROS
Data is allocated in 2-bit units
to I/O Units that require 4 bits,
so there may be unused areas
as shown in the following table.
8
#5 #4
#3 #2
Unused
#6
Allocated data pattern
Section 2-2
Output area
Word
15 8
First word Unused
#6
#5 #6
OD4 DA2
0
#1
#5
0
#5
13