High Country Tek HFS-J-Bus - Manual (Page 21)

Electronic Controller Solutions for the Global Fluid Power Industry
Hydraulic Fan System Controller with SAE J1939 Interface
HFS-J User Guide
Part No:- 021-00158 Rev C HFS-J Hydraulic Fan System Controller User Guide Page | 21
Controller Set-up Cont:
• PWM Freq ( Hz):
This is the ‘dither’ frequency that will be applied to the fan
speed control valve and should be selected to suit the
manufacturers data for the valve type and size selected for
the system. Input 33Hz to 500Hz
• Temp Units:
This setting selects either Degrees Farenhieght or Degrees
Centigrade and ripples through all the settings that deal with
temperature.
• Reverse Speed:
This window allows the user to set a fixed speed when the fan
goes into reverse ( purge or de-ice) mode
Input 0 to 100% of forward fan speed set by I Max & I Min.
• Dwell Time:
Set in Seconds, this is the time that the controller allows for the fan to get to minimum speed before changing
direction when entering or leaving the reverse mode.
Input 0 – 60 Seconds.
• Time in Reverse:
This is set in seconds and the time the fan will spend in the reverse mode.
Input 0 to 120 seconds
• Auto Reverse Time ( min ):
These are set in minutes and is the period between fan reverse cycles.
Set this to zero (0m) to turn OFF the
fan AUTOMATIC reverse feature.
Input – 0 to 1440 minutes .
• Reverse acting valve:
Select this button if you choose to use an inverse operating valve that defaults to full pressure with NO drive
current. If you have a valve that defaults to zero with NO drive current, de-select this option.
• Retry all faults:
Selecting this option will allow the controller to continue with normal operation after an intermittent fault has
occurred and cleared itself. During the fault condition, the fan will be driven to full speed, returning to desired
speed when the fault is cleared. If this option is NOT selected, the fan will go to full speed and remain there
even if the fault clears, until the power to the unit is cycled.
• Unit Disabled:
The controller is shipped in a disabled state and should be enabled by the OEM or user by using the GUI.
Once this button is selected, the date from the enabling PC is taken and used as the ‘Born Date’ when
warranty starts.
• Alarm Active High:
This sets the default state of the alarm output to allow normally OFF or normally ON devices to be driven.
When enabled, the output is HIGH when alarm condition exists and LOW with NO alarm condition.
When NOT enabled, the output is LOW when an alarm condition exists and HIGH with NO alarm condition
e.g. If the user uses a interlock system for alarms, then they can power the interlock system with the alarm in
ACTIVE LOW, Otherwise, ACTIVE HIGH means that voltage is supplied when there is an alarm condition
• Enable J1939:
This option MUST be clicked if the unit is to understand the J19349 Bus information. If this button is NOT
clicked, all J1939 features are disabled in the controller.