12
Mirka® AIROS • 77 mm (3"), 125 mm (5") & 150 mm (6") • Electrical manual
Example sequence for starting and stopping the tool:
• Write 4 (0x0004) to the “Operation” register, this will set the motor drive to ON-state.
• Write 4000 (0x0FA0) to the “Speed set-point” register, this will set the set-point speed to 4,000 rpm.
• Write 1 (0x0001) to the “Operation” register, this will set the motor drive to RUN-state and the tool will start running.
• Write 2 (0x0002) to the “Operation” register, this will set the motor drive to STOP-state and the tool will stop running.
• Write 8 (0x0008) to the “Operation” register, this will set the motor drive to OFF-state.
Digital interface
The motor drive can also be controlled via the digital interface instead of Modbus RTU, but with the added drawback
that there is no feedback when using the digital interface. To enable the digital interface, the JP12 jumper needs to be
set. Make sure that the JP8, JP9, JP10 and JP11 jumpers are set as well.
Connector J5 is used as input for the digital interface. The input is considered high if a voltage between 15–33 VDC is
applied to the input pin. The input is considered low if the voltage is below 12 VDC or if the input is left floating. The
GND pin of connector J6 must be connected between the systems. The J6 connector can also be used to provide a 15
VDC control voltage if needed.
Digital interface operations
J5.1 – DI1
J5.2 – DI2
J5.3 – DI3
J5.4 – DI4
Operation
0
0
0
0
Stopped
1
0
0
0
4,000 rpm
0
1
0
0
4,500 rpm
1
1
0
0
5,000 rpm
0
0
1
0
5,500 rpm
1
0
1
0
6,000 rpm
0
1
1
0
6,500 rpm
1
1
1
0
7,000 rpm
0
0
0
1
7,500 rpm
1
0
0
1
8,000 rpm
0
1
0
1
8,500 rpm
1
1
0
1
9,000 rpm
0
0
1
1
9,500 rpm
1
0
1
1
10,000 rpm
0
1
1
1
Run, no speed change
1
1
1
1
Run, no speed change
Self-test function
While holding down the S1 button the motor drive will perform a quick self-test. The alarm status flag will be set to
6 (self-test running). The indicators D4 and D14 will blink green if temperatures and voltages are within the limits. If
the temperatures or voltages are not within the limits then the indicators will blink red.
Reset function
The reset button S2 can be pressed momentarily to reset the motor drive. This is essentially the same as turning the
power off and on again.
