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 | 29
If the set up procedure does not achieve the desired results, double check the
wiring and perform the following tests. Record the test results.
Tools required
A PC running Windows XP and the correct HFS-J software are required for initial
set-up, programming or observation of the controllers operation through the
RS232 port ( directly or via a USB to serial converter cable ) .
The PC can also be used for uploading the configured program to new HFS-J modules for series
production.
A battery operated multi meter is always a good idea for measuring and confirming analog signals and an oscilloscope
would be useful for looking at fast moving or digital signals on the system.
Check the power input:
The module will not function correctly unless the +POWER supply is at least 10 VDC when driving the coils.
If the supply voltage is below 10VDC, there is a risk of:
a) Module shutting down, b) Module continuously trying to reset or c) Low drive current to valves.
If the supply voltage is more than 30 VDC there is a risk of:
a) Blown in-line AGC5 fuse, b) Module internal damaged or c) Coil damage due to excessive drive voltage.
Check the control inputs:
Verify any analog control inputs are the correct polarity and are hooked up correctly and to the correct module
terminals by monitoring their status with the HFS-J software or testing with a voltmeter or oscilloscope.
Ensure the J139 Bus is terminated correctly ( 120 ohm resistors ) and that the engine is running to ensure good data.
Ensure that any external control or command inputs have their respective sources 0V or GND connected to the
modules power supply 0V or GND terminal.
Verify the coil is not shorted or open:
Disconnect the wires going to the +COIL and -COIL terminals and measure the resistance between the wires. Verify it
is in the expected Ohmic range for the type and voltage of coil being driven. Verify that there is no voltage between
either wire and power or ground (indicating a short circuit to either power or ground).
If a +COIL or -COIL is short circuited or open circuited while being driven, the controller will shut down its outputs until
the user carries out a ‘Power-on-reset’ or disables the module.
(170 pagine)
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