turck BL20 - Representation of Process Input Data

D301087 0308 - BL20 CANopen 4-257
I/O-Module Objects
4
Representation of process input data
The process input data of the BL20-E-1SWIRE modules is repre-
sented by objects 6000
hex
, 6020
hex
, 6021
hex
, and 6022
hex
, 6100
hex
or
6120
hex
for digital input channels of a BL20 station.
The user can choose between 4 different formats for representing
the values:
 Only one bit represented by each SUB-index (objects 6020
hex
,
6021
hex
and 6022
hex
), see page 4-118.
 8 bits represented by each SUB-index (object 6000
hex
), see page
4-117.
 16 bits represented by each SUB-index (object 6100
hex
), see
page 4-119.
 32 bits represented by each SUB-index (object 6120
hex
), see
page 4-120.
PDO mapping of object 6000
hex
is always executed by default and
automatically for the first 8 sub-indexes.
This corresponds to the 64 bits of the SWIRE feedback interface. If
more than 64 process input data items are present, the PDO
mapping must be carried out by the user. A total of 36 groups of 8
bits each can be displayed (288 bits).
If the representation of the data bits is not required with the object
6000
hex
or if another arrangement of the mapped objects is required,
PDO mapping must be carried out by the user.