Wesley BC-620-4CA - Manual (Page 112)

108 Curtis 1234/36/38 Manual,
OS
11
SETUP_POT_FAULTS()
This function sets the upper and lower wiper fault voltages for a given pot input and
sets the replacement wiper voltage value that will be used if there is a fault. The
valid range for the function parameters is 0–6.25 V (0–400 counts). If this function
is not run, the default thresholds depend on the 1311 Throttle Type (or Brake Type)
parameter setting; see table below. If the Throttle Type = 5 (or Brake Type = 5), the
VCL function Setup_Pot will determine what fault thresholds are used.
THROTTLE TYPE LOW FAULT THRESHOLD HIGH FAULT THRESHOLD
1 0.1 V 5.5 V
2 none 5.5 V
3 0.1 V 5.5 V
4 0.1 V 5.5 V
5 (ONE_WIRE) none 5.5 V
5 (TWO_WIRE) 0.1 V 5.5 V
5 (THREE_WIRE) 0.1 V 5.5 V
Syntax Setup_Pot_Faults(Pot_ID,Low_Fault,High_Fault,
Fault_Value)
Parameters
Pot_ID identifies the throttle whose fault limits are being set:
THROTTLE_POT
BRAKE_POT
Low_Fault
Specifies the lower threshold voltage limit.
Scaling: 1 V = 64 counts.
High_Fault
Specifies the upper threshold voltage limit.
Scaling: 1 V = 64 counts.
Fault_Value
The value that is used for the pot input when there is a fault (0–32767).
Scaling: ±32767 = ±100%.
Returns
0 – Setup did not execute.
1 – Setup successful.
Error Codes
Bad_ID is returned when an incorrect pot ID is used.
Param_Range is returned when the voltage value is not within range.
Example Setup_Pot_Faults(THROTTLE_POT,19,320,4000)
For the throttle pot, this will set the lower pot voltage at 0.3 volts (19/64) and the
upper pot voltage at 5.0 volts (320/64). When there is a pot fault, the value of 4000
will be used. That is 4000/32767 of the full output, or roughly 12%.
7 — VCL