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A-17
Appendices
CJ-series EtherNet/IP Units Operation Manual for NJ-series CPU Unit (W495)
A-4 V
ariab
le Mem
o
ry
Allocation
Meth
od
s
App
A-4-1
V
ar
iab
le Memor
y
Allocation Rules
Example: The alignments and the amounts of memory that are allocated for the four variable declara-
tions given in the following figure are given in the following table.
Variable
Alignment [bytes]
Amount of memory that is allocated [bytes]
E
2
4
F
2
4
G
2
8
H
2
8
Data Type Definitions
Name
Structure STR_C
a
b
Data type
STRUCT
ARRAY[0..7] OF BOOL
BYTE
Variable E,
4 bytes
Variable F,
4 bytes
Variable G,
8 bytes
Variable H,
8 bytes
E.a[0] to E.a[7]
E.b
F.c
F.d[0] to F.d[7]
G[0].a[0] to G[0].a[7]
G[0].b
G[1].a[0] to G[1].a[7]
G[1].b
H[0].c
H[0].d[0] to H[0].d[7]
H[1].c
H[1].d[0] to H[1].d[7]
Bytes
Memory
First byte
First byte + 1
First byte + 2
First byte + 3
First byte + 4
First byte + 5
First byte + 6
First byte + 7
First byte + 8
First byte + 9
First byte + 10
First byte + 11
First byte + 12
First byte + 13
First byte + 14
First byte + 15
First byte + 16
First byte + 17
First byte + 18
First byte + 19
First byte + 20
First byte + 21
First byte + 22
First byte + 23
Variable Table
Name
Variable E
Variable F
Variable G
Variable H
Data type
Structure STR_C
Structure STR_D
ARRAY[0..1] OF STR_C
ARRAY[0..1] OF STR_D
Name
Structure STR_D
c
d
Data type
STRUCT
BYTE
ARRAY[0..7] OF BOOL
First byte +
(integer multiple of 2)
First byte +
(integer multiple of 2)
First byte +
(integer multiple of 2)
First byte +
(integer multiple of 2)
Not used.
Not used.
Not used.
Not used.
Not used.
Not used.
Not used.
Not used.
Not used.
Not used.
Not used.
Not used.
Not used.
Содержание SYSMAC CJ1W-EIP21
Страница 8: ...Manual Structure 6 CJ series EtherNet IP Units Operation Manual for NJ series CPU Unit W495...
Страница 10: ...Sections in this Manual 8 CJ series EtherNet IP Units Operation Manual for NJ series CPU Unit W495...
Страница 20: ...Read and Understand this Manual 18 CJ series EtherNet IP Units Operation Manual for NJ series CPU Unit W495...
Страница 42: ...Revision History 40 CJ series EtherNet IP Units Operation Manual for NJ series CPU Unit W495...
Страница 68: ...1 Introduction 1 26 CJ series EtherNet IP Units Operation Manual for NJ series CPU Unit W495...
Страница 80: ...2 Installing Ethernet Networks 2 12 CJ series EtherNet IP Units Operation Manual for NJ series CPU Unit W495...
Страница 130: ...6 Testing Communications 6 4 CJ series EtherNet IP Units Operation Manual for NJ series CPU Unit W495...
Страница 206: ...7 Tag Data Link Functions 7 76 CJ series EtherNet IP Units Operation Manual for NJ series CPU Unit W495...
Страница 246: ...8 Message Communications 8 40 CJ series EtherNet IP Units Operation Manual for NJ series CPU Unit W495...
Страница 266: ...9 FTP Server 9 20 CJ series EtherNet IP Units Operation Manual for NJ series CPU Unit W495...
Страница 374: ...13 Troubleshooting 13 56 CJ series EtherNet IP Units Operation Manual for NJ series CPU Unit W495...
Страница 431: ...Index 1 CJ series EtherNet IP Units Operation Manual for NJ series CPU Unit W495 I Index...
Страница 436: ...Index 6 CJ series EtherNet IP Units Operation Manual for NJ series CPU Unit W495 Index...
Страница 437: ......