Beckhoff AX2000 PROFIBUS DP communication profile Manual de usuario descargar pdf (Pagina 19)

4 Using the parameter channel (PKW)

The digital servo amplifiers of the AX2000/2500 series have to be adapted to the circumstances of

your machine. The parameters for the controllers are set using either the setup software or via the

PROFIBUS.

4.1 Read/write an amplifier parameter

Read (AK = 1) or write (AK = 3) amplifier parameters

To read or write an amplifier parameter through PROFIBUS, the corresponding PNU must be used.

The parameters that are written to the AX2000/2500 can be transferred to the non-volatile memory

by using the command “non-volatile parameter save” (PNU 971).

Telegram layout:

Request Response

PKE/AK 1 (read) / 3 (write) 2 (OK) / 7 (error)

PKE/PNU see 4.2.1 as transmitted

PWE

for AK = 3 see p.20ff for data type

for AK = 1 data type irrelevant

for AK = 3 returns the PWE of the request

for AK = 1 see p.20f for data type

4.2 Summary of the parameter numbers

All the parameter numbers (PNUs) for AX2000/2500 are listed in numerical order in the table on

page 20ff, with a short description. The parameter numbers in the range 900 – 999 are profile-spe

cific for the PROFIBUS drive profile PROFIDRIVE. Parameter numbers > 999 are manufacturer-

specific.

For better understanding, you can look up the ASCII commands which are in the column “ASCII

command” in the online help the setup software. A description of all ASCII commands can be found

in the ASCII reference lists (referring to the servo amplifier type) located on the product CDROM

and on our website.

Parameter numbers >1600 use the object channel (see p.31ff).

Note!

Some amplifier parameters (e.g. GV) have 2 PNU numbers in the AX2000/2500. Both of them

can be used to read and write the parameter (e.g. PNU 1200 and PNU 1672).

PROFIBUS for AX2000/2500 19

BECKHOFF 12/05 Using the parameter channel (PKW)

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Beckhoff AX2000 PROFIBUS DP communication profile Manual de usuario Pagina 19