SMAC CBC-EIP - Implicit (IO) Messaging

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Example: to obtain the value of object Max torque through Explicit messaging → service code:
0x0E, Class: 0x64, Instance: 0x6072, Attribute: 0x00
2.2.4 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 5 and 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 if a different object mapping is desired.
Table 5. Default mapping between CBC-EIP and input data assembly.
CBC-EIP object
Description
Input data byte location
(total: 26 bytes)
Status word
Actuator motion status
0 - 1
W4
Macro status
2 - 5
Position actual value
Encoder actual position
6 - 9
Current actual value
Force/current value
10 - 13
Following error value
Position error value
14 - 15
Error code
Actuator fault code
16 - 19
W5
Reserved
20 - 21
W6
Reserved
22 - 25
Table 6. Default mapping between CBC-EIP and output data assembly.
CBC-EIP object
Description
Output data byte location
(total: 24 bytes)
W30
Macro-specific parameter
0 - 3
W31
Macro-specific parameter
4 - 7
W32
Macro-specific parameter
8 - 11
W33
Macro-specific parameter
12 - 15
W34
Macro-specific parameter
16 - 19
W35
Macro-specific parameter
20 - 23