System Manual – MOVIDRIVE® compact Drive Inverters
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Starting the inverter with PROFIBUS-DP (MC_41A)
Startup
Programming
with PROFIBUS-
DP
Taking the example of the WRITE service, the following figure represents a process of
setting parameters between the controller and the drive inverter via PROFIBUS-DP
(
→
Figure 147). To simplify the process, Figure 147 only the management byte of the
parameter channel is displayed.
The parameter channel is only received and returned by the drive inverter 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 pro-
cesses the write service, but continues to answer all messages 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 controller 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.
Parameter data
format
When parameters are set via the fieldbus interface, the same parameter coding is used
as with the serial RS-485 interfaces or the system bus.
The data formats and value ranges for the individual parameters are listed in the
"MOVIDRIVE
®
Serial Communication" manual available from SEW.
00152BEN
Figure 147: Parameter setting procedure
0
0110010
00110010
0
0110010
0
0110010
0
0110010
00110010
01110010
00110010
0
1110010
0
1110010
01110010
0
1110010
01110010
Higher level automatic system
Drive inverter
(Slave)
PROFIBUS-DP
Parameter setting
channel is prepared
for WRITE service
Parameter setting
channel is received
but not evaluated
Parameter setting
channel is received
but not evaluated
Service acknowledge
received, as send and
receive handshake
bits the same again
Handshake bit is
toggled and service
transferred to
drive inverter
Write service
is processed
Write service is executed,
handshake bit is toggled
0
0
I
Summary of Contents for MOVIDRIVE compact MCH41A
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