High Country Tek emc-3L - Manual (Page 34)

Current I
For the DVC hardware PI Loop regulating current, this is the I value
Range: 0 to 655.00
Dither Amp
How much current above and below set point to dither
Range: 0 to 100%
Dither Hz
The frequency setting of the dither
Range: 1Hz to 500Hz
High Side # Name
This will be the access word for the High Side Output. Set this ON or OFF in your application.
Range: 16 Characters with no spaces. Valid characters are A-Z, a-z, 0-9, and "_".
Rules: The first character cannot be a number. Compiler Keywords or other Names already in use are not
valid.
Min Cur
The Min Coil current setting for Coil A in Single and Dual Coil selections corresponding to 0% PWM
Range: 0 to 3 A
Note: the text on how to set this value in your application described in the Max Cur section below.
Max Cur
The Max Coil current setting for Coil A in Single and Dual Coil selections corresponding to 100% PWM
Range: 0 to 3 A
In the 5.2 release of the BIOS, Programming Tool and Program Loader Monitor, the Coil Current Gain constants
are available to allow you to set the Max Cur or Min Cur in your application. Coil current gains are the factors
the BIOS uses to calculate the actual current through a coil given all of the variances in the current sense
circuits internal to the DVC controller. The Coil current gain constants are loaded into the individual DVC
controller’s flash memory when the unit is tested at HCT’s manufacturing facility.
Setting the Max Cur and Min Cur through your application is done with statements like:
OutputGroupName.maxcura = (Current_in_milliamps * 100) / HC_Coil_Gain_OG1
OutputGroupName.mincura = (Current_in_milliamps * 100) / HC_Coil_Gain_OG1
For Dual Coils the second coils current setting is accomplished with statements like:
OutputGroupName.maxcurb = (Current_in_milliamps * 100) / HC_Coil_Gain_OG1
OutputGroupName.mincurb = (Current_in_milliamps * 100) / HC_Coil_Gain_OG1
Ramps
Enable Current Ramps allows you to specify the slew rate applied to the output. Ramps are applied after the
demand of the output is calculated by the application. Therefore, with ramps applied you would see the Current
shown on the PLM follow the slew rate at the desired ramp rate while the demand shown on the PLM would
indicate the fully demanded value that the output is ramping to.
Ramp Down
When the Enable Current Ramps is selected, Ramp Down is the ramp from Max to Min Current. Ramps are
applied for all current / PWM% changes.
Range: 0.0 to 65.00 s
P/N: 021-00163, Rev. A.0 - for V5.2 Tools Page | 34