TPM
207-D533-NN User Manual
33
PDI
Physical Device Internal
Interface
A set of elements that allows access to DL-Service from the AL
PDO
Process Data Object
Objects that are sent and received in cyclic communications.
PDO mapping
Definitions
Process Data Object
Mapping
Definitions of the applications objects that are sent with
PDOs.
SDO
Service Data Object
Objects that are sent and received in mailbox communications.
PREOP
PRE-OPERATIONAL
The Pre-operational state in the EtherCAT state machine.
RXPDO
Receive Process Data Object The process data received by the ESC.
TXPDO
Transmit Process Data
Object
The process data sent by the ESC.
SM
Sync. Manager
The ESC unit that coordinates data exchange between the master and
slaves.
ro
Read only
COE Object just can be read only
rw
Read & write
COE Object just can be read and written.
SAVE
Save to flash memory
There is flash memory on K121 which can be used to save retain
variables.
STLD
Step Loss Detection
Function is used to detect the loss of stepper motor when it is running.
FoE
File transfer over EtherCAT
File can transfer over EtherCAT like Ethernet operation.
4.2
Data Types
The following table lists the data types and ranges that are used in this manual
Symbol
Data Type
Range
BOOL
Boolean
True or False
I8
Signed 8-bit integer
-128 to 127
I16
Signed 16-bit integer
-32,768 to 32,767
I32
Signed 32-bit integer
-2,147,483,648 to 2,147,483,627
U8
Unsigned 8-bit integer
0 to 255
U16
Unsigned 16-bit integer
0 to 65535
U32
Unsigned 32-bit integer
0 to 4,294,967,295
F32
32-bit float
F64
64-bit double float
STRING
Character string
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