DG-IRMCK203 Datasheet, PDF (42/67 Pages) International Rectifier – Application Developer’s Guide

Byte
Offset
7
0x18
0x19
IRMCK203 Application Developer’s Guide
Bit Position
6
5
4
3
2
1
0
StartLim (LSBs)
StartLim (MSBs)
VelocityControl Write Register Map
Field
Name
KpSreg
KxSreg
MotorLim
RegenLim
SpdScl
TargetSpd
AccelRate
DecelRate
MinSpd
StartLim
Access Field Description
(R/W)
W 15-bit velocity loop proportional gain, in fixed point with 5 fractional
bits. Range = 0 - 512.
W 15-bit velocity loop integral gain, in fixed point with 13 fractional bits.
Range = 0 - 2.
W Motoring torque current limit (4095 = rated motor current).16-bit
speed PI controller output positive limit.
W Regeneration torque current limit (4095 = rated motor current)16-bit
speed PI controller output negative limit (2’s complement)..
Motor Speed Scale factor. Spd value (in the VelocityStatus read
register group) is maintained in SPEED units of SpdScl * (Encoder
W counts / Velocity Loop Execution) or SpdScl * (RATE * Encoder
counts / PWM period). The user should set SpdScl = (64 * 16384) *
60 * PWMFREQ / (RATE * Max RPM * Encoder counts/revolution),
which will result in a Spd value ranging ±16384 corresponding to ±
Max RPM.
W Velocity loop speed setpoint in SPEED units, which are determined
by the user via the SpdScl register setting.
W Positive speedAcceleration rate limit.
W Negative speedDeceleration rate limit.
W Minimum speed protection. This parameter sets the minimum
reference speed.
W Drive start-up current limit. (4095 = rated motor current).
VelocityControl Write Register Field Definitions
4.2.6 FaultControl Register Group (Write Registers)
Byte
Offset
7
0x42
Bit Position
6
5
4
3
2
SPARE
FaultControl Write Register Map
1
FltClr
0
DcBusM
Enb
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