Siemens Simatic S7-200 System Manual page 337

Setting Up the MicroMaster 3 Drive
Before you connect a drive to the S7-200, you must ensure that the drive has the following system
parameters. Use the keypad on the drive to set the parameters:
1. Reset the drive to factory settings (optional). Press the P key: P000 is displayed. Press the up or
down arrow key until the display shows the P944. Press P to enter the parameter.
P944=1
2. Enable the read/write access to all parameters. Press the P key. Press the up or down arrow key
until the display shows P009. Press P to enter the parameter.
P009=3
3. Check motor settings for your drive. The settings will vary according to the motor(s) being used.
Press the P key. Press the up or down arrow key until the display shows the motor setting for your
drive. Press P to enter the parameter.
P081=Nominal frequency of motor (Hz)
P082=Nominal speed of motor (RPM)
P083=Nominal current of motor (A)
P084=Nominal voltage of motor (V)
P085=Nominal power of motor (kW/HP)
4. Set the Local/Remote control mode. Press the P key. Press the up or down arrow key until the
display shows P910. Press P to enter the parameter.
P910=1 Remote control mode
5. Set the Baud Rate of the RS–485 serial interface. Press the P key. Press the up or down arrow key
until P092 appears. Press P to enter the parameter. Press the up or down arrow key until the
display shows the number that corresponds to the baud rate of your RS–485 serial interface. Press
P to enter.
P092 3
4
5
6
7
6. Enter the Slave address. Each drive (a maximum of 31) can be operated over the bus. Press the P
key. Press the up or down arrow key until P091 appears. Press P to enter the parameter. Press the
up or down arrow key until the display shows the slave address you want. Press P to enter.
P091=0 through 31.
7. Ramp up time (optional). This is the time in seconds that it takes the motor to accelerate to
maximum frequency. Press the P key. Press the up or down arrow key until P002 appears. Press P
to enter the parameter. Press the up or down arrow key until the display shows the ramp up time
you want. Press P to enter.
P002=0–650.00
8. Ramp down time (optional). This is the time in seconds that it takes the motor to decelerate to a
complete stop. Press the P key. Press the up or down arrow key until P003 appears. Press P to
enter the parameter. Press the up or down arrow key until the display shows the ramp down time
you want. Press P to enter.
P003=0–650.00
Using the USS Protocol Library to Control a MicroMaster Drive
(1200 baud)
(2400 baud)
(4800 baud)
(9600 baud – default)
(19200 baud)
Chapter 11
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