Schneider Electric DS301 Cell Phone User Manual


 
0198441113586, V2.01, 11.2008
IL•1F CANopen DS301 6 Operation
Fieldbus interface 59
6 Operation
6.1 Overview
The programming examples show hands-on applications for network
operation. There are 2 access methods via the CANopen fieldbus: SDO
"Service Data Objects" and PDO "Process Data Objects".
Using SDOs An SDO access is a write or a read access to an individual object. The
available objects are described in the product manual and also summa-
rized in a table in the chapter "Parameters". This chapter describes the
use of SDOs on the basis of just a small number of objects since this
type of communication can be used with all available objects and the
structure is very similar in all cases.
Using PDOs PDOs are recommended for positioning mode because the information
is transmitted much more efficiently. The chapter provides various
hands-on examples of the application of PDO4 supported by the product
and describes the general procedure.
The PDO from the master to the product is referred to as "R_PDO".
The PDO from the product to the master is referred to as "T_PDO".
@ WARNING
UNINTENDED OPERATION
Do not write values to reserved parameters.
Do not write values to parameters unless you fully understand the
function. For more information see the product manual.
Run initial tests without coupled loads.
Verify that the system is free and ready for the movement before
changing parameters.
Verify the use of the bits with fieldbus communication: bit 0 is far
right (least significant). Bit 15 is far left (most significant).
Verify the use of the word sequence with fieldbus communication.
Do not establish a fieldbus connection unless you have fully
understood all communications principles.
Failure to follow these instructions can result in death, serious
injury or equipment damage.