Phoenix Contact IL PB BK DI8 DO4/EF-PAC, Руководство пользователя

Страница: 27 / 80

Acyclic communication (DP/V1 and PCP)
7725_en_01 PHOENIX CONTACT
3-3
Parameters of a frequency
inverter
As an electrical drive controller, a key feature of a frequency inverter is that changes can be
made to process variables (e.g., speed, position, and torque) using analog or digital
signals. Additional information is required to optimize the adaptation of the drive controller
and motor to the process. As well as setpoint information, the frequency inverter also
requires information about the motor type point, the minimum and maximum permissible
speed of the system, the maximum speed variation during acceleration and deceleration,
starting ramp, starting current, etc.
These types of additional information are device-specific parameters, which can be
modified via the parameter data channel.
The parameter values for all PCP devices are the subject of communication via the
parameter data channel. To enable the individual parameters to be distinguished during
communication, each parameter has a number, the index.
Index The index is the address of the communication object. It is required to identify the object.
Object description
The object description includes all the properties of the object, such as data type, object
type, name, etc.
Object types There are various different object types:
Simple variable – Simple variable type objects.
Examples include measured values, the time or status of a terminal.
Array – Array type objects, i.e., several "simple variable" objects of the same type, which are
grouped to form one object. Each element can be accessed individually.
An example of an array is a range of the same type of measured values.
Record – Record type objects, i.e., several "simple variable" objects of different types, which are
grouped to form one object. As for the array type, each element of a record can be
accessed individually. An example of a record is the group of data in a test report, which
contains not only the actual measured value, but also additional information, e.g., the
time of the measurement.
Program invocation – Program invocation type objects, i.e., program sequences that can be run.
Table 3-1 Object description (example)
Object description (OD)
Index Type Object Name
... ... ... ...
60 4A
hex
Ramp Record Speed quick stop
60 4B
hex
Integer16 Array Setpoint factor
... ... ... ...
For additional information about PCP communication, please refer to the
IBS SYS PCP G4 UM E user manual, Order No. 2745169.