Details of explicit exchange language objects for the AS-i function
(Original Document)
About us
At a glance
The tables below present the language objects allowing management of the operating mode of the AS-i function and the parameters of the slaves present on the AS-i bus. These objects are not built into the IODDT’s.
Operating mode object
This word type object is used to manage the switch to Offline mode or Data Exchange Off mode of the AS-i master.
NOTE: Use of this object requires a thorough knowledge of AS-i communication principles.
Description
The table below presents the coding of bits 0 to 3 of the %MWr.m.c.24 word providing access to the various modes.
Bit 3
Bit 2
Bit 1
Bit 0
Function
0
0
0
0
Normal Operating Mode
0
0
0
1
Activation of offline mode
0
0
1
0
Deactivation of offline mode
0
0
1
1
Ineffective
0
1
0
0
Activation of data exchange off mode
1
0
0
0
Deactivation of data exchange off mode
1
1
1
1
Ineffective
NOTE: Offline mode has priority over Data Exchange Off.
Parameter objects
These objects are used to manage the parameters of slave devices. They can be modified without stopping the AS-i function.
Description
The table below provides the meaning of the different bits of words %MWr.m.c.25 to %MWr.m.c.56.
Number
Type
Access
Indicates
%MWr.m.c.25
INT
R/W
Not significant.
%MWr.m.c.26 to 56
INT
R/W
Contain the parameter values of slaves 1 to 31 respectively.