NORD Drivesystems BU0090 - Manual (Page 46)

NORDAC AS-Interface Manual
46 BU 0090 GB
Examples of direct parameters:
Writing the parameter P102 start-up time with value 1s (with 0.01 resolution 100
dec
= 64
hex
)
-00 54 00 64 (2 words) transferred as a Write order
Writing the functions in parameter P480 for BusIO In Bits 0 and 1
(Bit 0: enable right = 1; Bit 1: Error acknowledgement = 12)
-00 6C 00 01 00 0C (3 words) transferred as a Write order
Reading of parameter P509 interface and P513 telegram down time
-00 8C (1 word) transferred as a Write order
-transfer Read command and evaluate the value for P509, interface
-transfer Read command and evaluate the value for P513, telegram down time
5.3.2 PKW Parameter-String
The data after the index 00 02
hex
correspond to the PKW component of the USS protocol. Further information
regarding the structure and meaning of the individual data words of the parameter range (PKW) is described in
Section 5.5. In principle, all parameters of the frequency inverter can be read and written with this (insofar as
they can be changed).
0 1 2 3 4 5 6 7 8 9
Index PKW data, 3 or 4 words
0002
hex
PKE IND PWE1 PWE2
There are permissible lengths of a total of 4 and 5 words, corresponding to integer (16 Bit) and long (32 Bit)
parameters. Write orders with other lengths are ignored by Index 00 02
hex
. This causes the index to be reset to
00 00
hex
. If a Write order is transferred in order to read a parameter, this must also have the corresponding
length (integer/long). The parameter value for the Read command is only updated once by the frequency
inverter, i.e. if at a later time only the Read command is carried out (without a previous Write order), the
parameter value read is not the current one. If e.g. an information parameter (P7xx) is to be regularly read, this
must always be started with a new Write order and a subsequent Read command.
Examples of PKW parameter strings:
Writing (command of parameter P102 start-up time (P102 = 66
hex
; Subindex = 0; Integer) with the value 1s
(with 0.01 resolution 100
dec
= 64
hex
)
-00 02 20 66 00 00 00 64 (4 words) transferred as a Write order
-perform the Read command repeatedly until the parameter number and the subindex in the order agree. If
these are identical, the response label and the parameter value must be checked.
Reading (order label =1) of the module status parameter (P746 = 2EA
hex
; Subindex = 0; Integer)
-00 02 12 EA 00 00 00 00 (4 words) transferred as a Write order
-perform the Read command repeatedly until the parameter number and the subindex in the order agree. If
these are identical, the response label must be checked. Reading of a current value must be once again
started with a Write order.
Reading (order label = 1) of actual position parameter (P601 = 259
hex
; Subindex = 0; long)
-00 02 12 59 00 00 00 00 00 00 (5 words) transferred as a Write order
-perform the Read command repeatedly until the parameter number and the subindex in the order agree. If
these are identical, the response label must be checked.