112
Manual – MOVIDRIVE® MDX60B/61B Communication and Fieldbus Unit Profile
7
Setting the inverter parameters
SEW Unit Profile
Using the WRITE service as an example, the following figure represents a process of
setting parameters between the controller and inverter using a cyclic PDU type. To sim-
plify the sequence, only the management byte of the parameter channel is shown here.
The drive inverter only receives and returns the parameter channel while the controller
is preparing the parameter channel for the write service. The service is not activated until
the moment when the handshake bit is changed (in this example, when it changes from
0 to 1). The drive inverter now interprets the parameter channel and processes the write
service, but continues to respond to all telegrams with handshake bit = 0. The executed
service is acknowledged with a change of the handshake bit in the response message
of the drive inverter. The master now detects that the received handshake bit is once
again the same as the one which was sent. It can now prepare another parameter
setting procedure.
00152BEN
0 110010
0
0 110010
0
0 110010
0
0 110010
0
0 110010
1
0 110010
0
0 110010
1
0 110010
0
0 110010
1
0 110010
1
0 110010
1
Higher level automatic system
RS-485
Drive Inverter
(Slave)
Parameter setting
channel is prepared
for WRITE service.
Handshake bit is
toggled and service
transferred to
drive inverter.
Service acknowledge
received, as send and
receive handshake
bits the same again.
Parameter setting
channel is received
but not evaluated.
Write service is executed,
handshake bit is toggled.
Write service
is processed.
Parameter setting
channel is received
but not evaluated.
Summary of Contents for MOVIDRIVE MDX60B
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