Omron PROFINET NX-PNC202 User Manual page 184

9 Setting Up the PROFINET Coupler Unit
• One block of mapped output data and one block of mapped input data are maintained in the
PROFINET Unit.
• Refer to 9-6 NX Unit IO Allocation on page 9-27 for details about IO allocation and PROF-
INET Coupler Unit Status.
• Bit-sized NX Units (digital IO types, up to 8 points), e.g. NX-ID3317, NX-OC2633 are
grouped together in words. They are mapped from the right-most bit to the left-most bit.
• Word-sized NX Units (analog IO types) and 8 points or higher Bit-sized NX Units, e.g.
NX-AD2203, NX-DA203, NX-ID4342 (8 points Input), NX-OD5121 (16 points output) are
mapped in word units, from the low to the high word address.
• The combined total size of mapped input data can be up to 512 bytes.
• The combined total size of mapped output data can be up to 512 bytes.
 IO Mapping Example
IO data is mapped to the PROFINET Coupler Unit's IO data blocks in the same order the NX Units
are connected to the PROFINET Coupler Unit, regardless of the NX Units' models.
The example below shows the IO data mapping to the Input / Output blocks.
Input area
Word
15 8
PROFINET Coupler Unit Status
+1
Unused #3
+2
#4
+3
Some areas may be unused
when data is mapped.
The following example shows the mapping of NX Output Units.
PROFINET
Coupler Unit NX-OD3121
Additional Information
• Refer to the appropriate NX-series User's Manual for more information on NX Unit data allo-
cation sizes.
• Refer to 9-2 Setting IO Device Terminal Parameters on page 9-5 for more information about
status data configuration.
9 - 28
0
#2 #1
PROFINET #1
Coupler
NX-ID3317 NX-ID3317 NX-ID3317 NX-AD2203 NX-OD3121 NX-OC2633
Unit
PROFINET IO Device Configuration
#1 #2
NX-OD3121 NX-OD3121
15
Word
8
+0 #5 #4 #3
+1
Unused
+2
#6
+3
#2 #3 #4
#3 #4 #5
NX-OC2633 NX-OD3121
Data is allocated in 2-bit units
to NX Units which require 4 bits.
There may be unused areas
as shown in the following table.
0
#2 #1
#5
NX-series PROFINET Coupler Unit User's Manual (W623)
Output area
Word
15 8
First word Unused
#6 #5
#6
#5
#6
NX-DA2203
0