BECKHOFF AX2000 PROFIBUS DP communication profile - Manual (Page 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)