Festo Контроллер двигателя SFC-ST - Manual (Page 58)

4. Parametrizing blocks
4−4
Festo P.BE−SFC−DC−PB−S7−E N en 0604NH
4.1.1 Control and parametrizing methods
DPV0 Parametrizing with the DPV0 is carried out via the Festo paraĆ
meter channel (FPC, further 8 I/O bytes), see manual for the
SFC−DC−...−PB.
DPV1 Die Parametrizing with the DPV1 is carried out via the paraĆ
meter channel as per PROFIdrive V3.1. This protocol is a comĆ
patible extension of the PKW protocol within the DPV1 work
data. This means that the parameters can be addressed with
PNU, subindex etc.
4.1.2 Method of operation of the blocks
With all blocks a parameter is clearly defined by the PNU
(parameter number), the subindex and the length in bytes.
With the blocks named under 4.1 only one parameter can be
transferred in each case. With the bit RD_WR you can define
whether the parameter is to be read or written. When the
parameters are transferred, a distinction is made between
three data types: Byte, Word, Double word or length 1, 2, 4.
How the parameter is to be interpreted can be found in the
description of the relevant parameter, see manual for the
controller used.
An overview of the parameters can be found in appendix B.1.
It is not necessary to specify the length of the parameter in
order that it can be read.
A positive edge at the start input triggers the transfer. When
the transfer is completed, this will be shown at the output
Done. The result of the transfer is shown all the time the start
bit is set to 1.
The reply to an incorrect parameter entry depends on the
transmission method.