8-33
8 CIP Message Communications
NY-series Industrial Panel PC / Industrial Box PC Built-in EtherNet/IP Port User’s Manual (W563)
8-3
CIP Com
m
u
n
ica
tion
Server Fu
ncti
ons
8
8-3
-1 CIP Message S
tructure for
Accessing CIP Object
s
This section shows how to specify messages to access CIP objects.
The CIP objects to access are expressed by connecting the segments that are defined in the CIP Com-
mon specifications in the request path field in a CIP explicit message.
Example: Performing the Reset service (0x05) to the Instance (01 hex) of the Identity object (class: 01
hex)
This section shows how to specify messages to access variables.
The variables to access are given by connecting the segments that are defined in the CIP Common
specifications so that explicit message can be set in the request path field.
The following elements are combined to make the specification.
Specifying the variable to access: The elements are stored in the CIP segments and then joined to
make the message.
Example: Reading the Present Value of One Member of the
VarAA.MemB[1.2]
Structure Variable
Example for Using the CIP Read Data Service for a Variable Object
8-3-1
CIP Message Structure for Accessing CIP Objects
8-3-2
CIP Message Structure for Accessing Variables
CIP Explicit Message (Request)
[1]
(20 01)
[2]
(24 01)
Service
Code
(0x05)
Request
Service
Data
(num of
elem)
Request
Path Length
(02)
Request Path
Logical Segment
(Class ID)
Logical Segment
(Instance ID)
Specify the performed service
code. Refer to
for information about
the service codes.
Specify the Class ID and
Instance ID to access.
Specify the Request Data
according to the service.
CIP Explicit Message for a Request
“MemB”
(91 04 4D 65 6D 42)
[1]
(28 01)
[2]
(28 02)
ANSI Extended Symbol Segment
Logical Segment
(Member ID)
Service
Code
(4C hex)
Request
Service
Data
(num of
elem)
Request
Path Length
(09)
“VarAA”
(91 05 45 61 72 41 41 00)
Request Path
Refer to
for infor-
mation about the service codes.
for information about how to
specify variables names.
for details about how to specify
data formats.
Summary of Contents for Sysmac NY512-1300
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