9300 Servo PLC
Connection
3-48
9300ServoPLC EN 1.4
3.4.6 Process data
For therapid exchangeof data between drivecontrollers,orwith ahigher-levelcontrol system, there
are3 process-data objects (PDO)availableforinput information, and 3 PDOs for output information.
With these PDOy ou can transmit simple binary signals, such as the states of digital input terminals,
or even complete values in 16 or 32 bits, such as analog signals.
These data objects are stored as system blocks under the inputs and outputs.
(The PDOs are included in the 93XX drive controller as CANx_IO system blocks).
Cyclical process-data objects
For rapid cyclical data communication, there is a PDO available for input signals and a PDO for
outputs signals, each with 8-byte user data.
These data are intended for higher-level control systems, such as a PLC (system block CAN1_IO).
Event-controlled process-data objects
For event-controlled data communication, there are 2 PDOs available for input signals and 2 PDOs
for outputs signals, each with 8-byte user data.
The data will always be transmitted if a value changes in the user data. These PDOs are especially
suited for the data communication between drive controllers, and for decentralised terminal
expansion.
However, they can also be used by a higher-level control system (system blocks CAN2_IO and
CAN3_IO).
To Next Page
Loading...
