110
Manual – MOVIDRIVE® MDX60B/61B Communication and Fieldbus Unit Profile
7
Setting the inverter parameters
SEW Unit Profile
Since this is a read service, the sent data bytes (bytes 4 - 7) and the data length (in the
management byte) are ignored and do not need to be set.
The inverter now processes the read service and sends the service confirmation back
by changing the handshake bit.
7.6.4
Example: Writing a parameter (WRITE)
A parameter is written as it is read via the fieldbus interface (see figure below).
Byte 0: Management
7
6
5
4
3
2
1
0
0
0/1
1
1
0
0
0
1
Service identifier:
0001 = Read
Data length:
11 = 4 bytes
Handshake bit:
Must be changed with every new job.
Status bit:
0 = No error while executing service
1 = Error while executing service
X = Not relevant
0/1 = Bit value is changed
54675BEN
WRITE (8470: 2.5 s)
OK
Error + return code
CLIENT
SERVER
Write
request
Write
confirmation
Write error
confirmation
OR
Negative
write response
Write response
Write indication
2b. Error occurred!
No data written
2a. Parameter index
8470 is set to
2.5 s.
1. Write request (e.g. write parameter value 2.5 s to index 8470 = ramp t11 up CW)
3a. Write service is responded with the data (e.g. 0.5 s)
3b. Write service faulty, e.g. because parameter value to high
Summary of Contents for MOVIDRIVE MDX60B
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