SMAC CBC-EIP, Руководство пользователя, Страница: 15 / 42

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2.2.3 Connecting with a PLC
See Appendix A for more information about this.
2.2.4 Explicit messaging
The CBC-EIP supports up to 6 simultaneous Class 3 connections. The explicit messaging
service provides access to standard Ethernet/IP objects such as Identity, TCP/IP Interface
and Ethernet Link, as well as all the objects belonging to the drive functionalities of CBC-EIP,
as can be found from object dictionary list in the embedded motion control library manual
(
https://www.smac-
mca.com/documents/PDFs/Embedded%20Motion%20Control%20Library.pdf ).
The supported explicit message CIP service codes are:
•
0x0E: Get attribute single
•
0x10: Set attribute single
Meanwhile, the mapping between CIP addressing and the CBC-EIP objects are:
•
Class ID: 0x64
•
Instance ID: CBC-EIP object Index from Embedded Motion Controller Library manual
•
Attribute ID: CBC-EIP object Subindex from EMCL manual
Example: to obtain the value of object Max torque through Explicit messaging
→
service
code: 0x0E, Class: 0x64, Instance: 0x6072, Attribute: 0x00
2.2.5 Implicit (IO) messaging
The CBC-EIP supports a simultaneous class 1 connection type of exclusive owner , with the
specifications:
•
Input data assembly (T
→
O, Target to Originator): Instance 100
o
Max. number of mapped objects: 8
o
Max. mapping length: 32 bytes
•
Output data assembly (O
→
T, Originator to Target): Instance 150
o
Max. number of mapped objects: 8
o
Max. mapping length: 32 bytes
SMAC has defined a default mapping between the above IO data assemblies and CBC-EIP
objects to allow the execution of macros discussed in section 2.2.1 of this manual. The default
mapping is presented in
Tables 2.5 and 2. 6 , which have been tailored to work with Add-on
instructions in the programming environment of Allen-Bradley PLCs, as further described in
Section 3 of this manual. Please contact SMAC sales/tech representative if a different object
mapping is desired.