IO644 - Receive
IO644 - Receive — Receives cyclic data from the
CANopen master
Library
Simulink Real-Time - Speedgoat

Description
This block is used to receive data from the CANopen master.
Your model can contain only one Receive block for each
I/O module in your target machine.
Ports
Outputs
One vector of data type UINT8 which the block reads from the RX area
of the dual-port memory. This area contains data which has been received
from the CANopen master. Use Byte
Unpacking blocks to extract specific data. The Number of Bytes parameter sets the length of
this vector.
The RX area has a length of 512 bytes. Each byte is represented by a
RX application object in the CANopen object dictionary.
The slave receives data via process data objects (PDO). The maximum
number of RX PDOs is 64. One PDO can contain up to 8 application objects
and therefore has a maximum length of 8 bytes. The link of an
application object to a position in a process data object is stored in
the PDO mapping configuration. The I/O module retrieves the PDO mapping
from the master during the connection process. The corresponding manual
of the master device describes how to configure communication objects in
the master.
The RX PDOs are included in the CANopen object dictionary from
addresses 0x1400 to 0x143F. The mapping information for each RX PDO is
stored in the CANopen object dictionary from 0x1600 to 0x163F.
Type:
scalar | vector
Data Type:
uint8
Inputs
This block does not have any inputs ports.
Parameters
-
Module ID
This ID defines the link to the corresponding Setup block
-
Number of Bytes
The number of bytes that should be read from the RX data area. This
parameter sets the length of the output port.
-
Sample Time
Defines the base sample time at which this driver block gets its sample hit. This
parameter can also be set to -1 for inherited
sample time. The units are in seconds.
![[Caution]](images/caution.png) | Caution |
|---|
All blocks that interface with the same I/O module must have identical
sample times. |