237-00156 SofTec Microsystems SRL, 237-00156 Datasheet - Page 75

• 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 74
Parameter Name
Final Current
Final Duty Cycle
Alignment
Duration
Mechanical
Acceleration
Rate
Duty Cycle
Current
Number of Z
Events Before
Autoswitched
Mode
Step Number
without Z
detection
Table 6.3: AK-ST7FMC Control Panel: BLDC Motor Start-Up Settings
In Current mode, sets the final current at the end of the programmed
alignment time.
MCPVH and MCPVL compare registers.
In Voltage mode, sets the final duty cycle at the end of the
programmed alignment time.
MCPUH and MCPUL compare registers.
The alignment duration is the duration of the alignment phase.
MCOMP (data) and MPRSR (clock) registers.
The acceleration phase is a phase during which synchronous rotation
is forced on the motor with a fixed acceleration rate in order to get
BEMF information and switch from the forced mode to the
autoswitched mode as soon as possible.
Forced mode: MCRA register, SWA bit at 0.
Autoswitched mode: MCRA register, SWA bit at 1.
To achieve mechanical acceleration, a 64-step acceleration ramp is
built, based on this parameter. 64 steps are usually more than enough
to safely reach Autoswitched mode. If Autoswitched mode cannot be
reach by the end of the acceleration ramp, the motor will stop and the
“Start-Up Fails” or “Motor Stalled” (if rotor blocked) red icon turns on.
This value can be set in Hz/s or RPM/s (click the “Hz” or “RPM”
button next to the edit box to switch between units).
Constant duty cycle applied during the acceleration phase.
MCPUH and MCPUL compare registers.
Constant current reference applied during the acceleration phase.
MCPVH and MCPVL compare registers.
Number of consecutive Z events that must be detected to switch to
Autoswitched mode.
Number of first steps of the ramp which are blanked (no BEMF
reading). During the very first steps of the acceleration, the BEMF may
be too low to be detected. During these first steps, the BEMF detection
should be inhibited.
Parameter Description