Beckhoff CX8050, Документация

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CAN
CX8050, CX8051 - Embedded-PCs for
CANopen and CAN 127 Version: 1.4
Analog inputs
Index Sub-index Name Type Attribute Mapping Default
value Meaning
0x6401 0 Number of
elements Unsigned8 ro N Depending
on type and
fittings Number of
analog
input
channels
available
1 1
st
input Unsigned16 ro Y 0x0000 1
st
input
channel
... ... ... ... ... ... ...
0XFE 254
th
input Unsigned16 ro Y 0x0000 254
th
input
channel
The analog signals are displayed left aligned. The representation in the process image is therefore
independent of the actual resolution. Detailed information on the data format can be found at the relevant
signal type.
Analog outputs
Index Sub-index Name Type Attribute Mapping Default
value Meaning
0x6411 0 Number of
elements Unsigned8 ro N Depending
on type and
fittings Number of
analog
output
channels
available
1 1
st
input
block
Unsigned16 rw Y 0x0000 1
st
output
channel
... ... ... ... ... ... ...
0XFE 254
th
input
block
Unsigned16 rw Y 0x0000 254
th
output
channel
The analog signals are displayed left aligned. The representation in the process image is therefore
independent of the actual resolution. Detailed information on the data format can be found at the relevant
signal type.
Event driven analog inputs
Index Sub-index Name Type Attribute Mapping Default
value Meaning
0x6423 0 Global
Interrupt
Enable Boolean rw N FALSE (0) Activates
the event-
driven
transmissio
n of PDOs
with analog
inputs.
Although, in accordance with CANopen, the analog inputs in TxPDO2..4 are by default set to transmission
type 255 (event driven), the event (the alteration of an input value) is suppressed by the event control in
object 0x6423, in order to prevent the bus from being swamped with analog signals. It is recommended that
the flow of data associated with the analog PDOs is controlled either through synchronous communication or
through using the event timer. In event-driven operation, the transmission behavior of the analog PDOs can
be parameterized before activation by setting the inhibit time (object 0x1800ff, sub-index 3) and/or limit value
monitoring (objects 0x6425) and/or delta function (object 0x6426).