
UK
Output Module CR2011
21
PDO
Process Data Object; in the CANopen network for transfer of process data in real time;
such as the speed of a motor PDOs have a higher priority than SDOs; in contrast to the
SDOs they are transferred without confirmation� PDOs consist of a CAN message with
identifier and up to 8 bytes of user data�
PDO Mapping
describes the application data transferred with a PDO�
Pre-Op
Preoperational; operating state of a CANopen participant� After application
of the supply voltage each participant automatically goes into this state�
In the CANopen network only SDOs and NMT commands can be transferred
in this mode but no process data�
Prepared
(also stopped) operating state of a CANopen participant
In this mode only NMT commands are transferred�
Rec PDO
(Rx PDO)
Receive Process Data Object
ro
read only (unidirectional)
rw
read-write (bidirectional)
RX-Queue
reception buffer
s16
data type signed 16 bit
SDO
Service Data Object;
With this object direct access to the object directory of a network participant is possible
(read/write)� An SDO can consist of several CAN messages�
The transfer of the individual messages is confirmed by the addressed participant�
With the SDOs devices can be configured and parameters can be set�
Server SDO
process and parameter set to make the object directory of a network participant
available to other participants (clients)�
S-Idx
(SIdx)
Subindex within the object directory of a CANopen device
Start Guarding
start node guarding
str
data type string (variable for strings such as text "load")
Sync Error
missing Sync OBJ in the adjustable communication cycle
Sync OBJ
synchronisation object for simultaneous update in the complete network or
for accepting process data of the respective parameterised PDOs�
Sync Windows
time during which the synchronous PDOs have to be transferred
Time Stamp
time stamp to align existing clocks in network participants
Trans Type
type of process data transmission; synchronous, asynchronous
Trans PDO
(Tx PDO)
transmit process data object
Trans SDO
(Tx SDO)
transmit service data object
Tx-Queue
transmit service data object
u8 (16, 32)
data type unsigned 8 (16, 32) bits
wo
write only