Chapter 6 – Communication
6-9
Installation and Start-up Guide for NPBA-01
Example
In this example, cyclic Read and Write commands are used to set
ACS 600 Parameter 22.2 ACCELER TIME 1 (= PROFIBUS Parameter
402) to 3.0 seconds. Also, a Start command and a reference (1000
rpm) are given.
In the request message, the first two bytes are used for parameter
identification. The first digit (2) denotes the function PARAMETER
VALUE WRITE (see the table on previous page). The second digit
along with the second byte (1 and 92) indicate PROFIBUS Parameter
No. 402 (Hex 192). Bytes 7 and 8 (00 1E = Dec 30) is the parameter
value (30 meaning 3.0 seconds). The last four bytes are the Control
Word and a Reference value (see pages 6-10 and 6-11). Control Word
value 04 7F starts the motor, while 34 15 (Dec 13333) signifies
1000 rpm, providing that Parameter 11.5 is set to 1500 rpm (the default
value).
In the response message, the first digit (1) indicates the function
PARAMETER VALUE UPDATED (see previous page). The last
four bytes are the Status Word and an Actual value (see pages 6-12
and 6-13).
The first digit (1) in the request message denotes the function
PARAMETER VALUE READ. The Control Word and the Reference
value are in the Write command above.
The response message bytes 7 and 8 indicate the parameter value, set
with the Write command as described above.
Response Label Fault Codes
0
Illegal parameter
1
Parameter is read-only
2
Value is outside limits
3
Invalid subindex
4
Not an array
5
Invalid data type
9
Description data not defined
103
Request not supported
301
Fault in internal (DDCS) communication
18
Other
Write:
Request
21
92
00
00
00
00
00
1E
04
7F
34
15
Response
11
92
00
00
00
00
00
00
03
37
34
15
Read:
Request
11
92
00
00
00
00
00
00
04
7F
34
15
Response
11
92
00
00
00
00
00
1E
03
37
34
15
