237-00156 SofTec Microsystems SRL, 237-00156 Datasheet - Page 73

• Manufacturer Part Number: 237-00156
• Description: BOARD ISOLATION FOR ST7
• Manufacturer: SofTec Microsystems SRL
• Type: Optoisolation Boardr

Specifications of 237-00156

• Contents: *
• For Use With/related Products: STMicro ST7FMC Motor Control Device
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

6
AK-ST7FMC Control Panel Features
Page 72
Parameter Name
Driving Mode
Current
Limitation
Speed
Regulation
Sensor 60°
Current Mode
Voltage Mode
When using Voltage mode, a programmable current limitation can be
set. The AK-ST7FMC Control Panel doesn't allow to set this value in
real time (the motor needs to be stopped each time). However, in the
actual application, the maximum current value can be programmed
and modified by software in real time (by varying the 8-bit ARTimer or
12-bit PWM duty cycle and connecting the 8-bit ARTimer or 12-bit
PWM output to the proper RC circuit, this RC circuit being connected
to the current comparator input).
MCPVH and MCPVL compare registers.
Open Loop
Parameter Values/Description
To run the motor in Sensor mode you need to
properly set jumpers W14, W15, W16. For the
AMETEK motor the wiring of sensors provided is
compatible with the firmware to control the motor
in Sensor mode. For other motors you need to
connect sensors and respect sensor wiring (and
modify jumper settings accordingly).
MCRA register, bit SR at 1.
In this mode, a current reference is set either by
the user (in Open Loop mode) or by the PI
(Proportional Integral regulator) to reach or
maintain target speed (in Closed Loop mode).
The ST7FMC motor control peripheral
automatically adapts the PWM duty cycle to
maintain the current in the motor at the level of
the current reference.
MCRA register, bit V0C1 at 1.
Voltage mode is preferred in applications
requiring high torque at start-up and applications
with significant load variations. In this mode, a
PWM duty cycle is set by the user (in Open Loop
mode) or by the PI (Proportional Integral
regulator) to reach or maintain target speed (in
Closed Loop mode).
MCRA register, bit V0C1 at 0.
No speed regulation (no Proportional Integral
regulation) is available. The motor is controlled
directly by the user through duty cycle (voltage
mode) or current reference (current mode).
Useful to fine tune the start-up parameters and
the BEMF rising and falling edge coefficients.