SEW-Eurodrive MOVIDRIVE compact MCH41A, System Manual

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352
System Manual – MOVIDRIVE® compact Drive Inverters
10
Starting the inverter with PROFIBUS-DP (MC_41A)
Startup
Control via
PROFIBUS-DP The inverter is controlled via the process data channel which is one, two or three I/O
words in length. These process data words may be mapped in the I/O or peripheral area
of the controller if a programmable controller is used as DP master and can be
addressed as usual (see following figure).
Control example
for Simatic S5
While the process input data (actual values) for a Simatic S5 may be read in via load
commands, the process output data (setpoints) can be sent with transfer commands.
Starting with Figure 145 the example shows the syntax for processing of the process
input and output data of the MOVIDRIVE
®
drive inverter. The factory setting for the
process data channel is displayed in the comment.
STEP7 sample
program In the example, the MOVIDRIVE
®
unit is configured using the '3 PD' process data
configuration to the input addresses PW156 ... 161 and output addresses PW156 ...
161. The consistent access may take place in the sequence 'Last byte first.'
The CPU type will mainly determine data consistency in Simatic S5. You will find further
information on correct programming with data consistency in the manuals on CPU or DP
master components in Simatic S5.
02906AEN
Figure 145: Assignment of the I/O area in the PLC
PW160
PW158
PW156
PW154
PW152
PW150
PW148
PO1 PO2 PO3
PI1 PI2 PI3
PW160
PW158
PW156
PW154
PW152
PW150
PW148
E
Q
Parameter channel
Parameter channel
PLC
address area
Output data
Input data
//Consistent input of actual values
L PW 160 //Load PI3 (no function)
L PW 158 //Load PI2 (actual speed value)
L PW 156 //Load PI1 (status word 1)
//Consistent output of setpoints
L KH 0
T PW 160
Write //0
hex
to PO3 (without function)
L KF +1500
T PW 158
Write //1500
dec
to PO2 (speed setpoint = 300 1/min)
L KH 0006
T PW 156
Write //6
hex
to PO1 (control word = enable)
0 0
I