Curtis 1298 Manual, OS 11
99
parameter Pump_Max_PWM. The VCL variable Pump_Throttle is displayed
in the 1311 Monitor
» Inputs menu. Next the signal goes through the HPD
checking block, which checks for HPD conditions according to the setting of
the Hyd_Inhibit_Type parameter. The signal will be switched to zero if the main
contactor has not been pulled in (Main State = 5) or if the 1298 FET bridge
has not been enabled (Main State = 10 and Main Enable = Off). The signal
then continues to the Current Limit Processing block and to a final switch block
where a fault action (Shutdownpump) can shut down the pump output. The
final output to the pump motor is a VCL variable called Pump_Output and is
displayed in the 1311 Monitor
» Inputs menu as Pump PWM.
The following hydraulic throttle processing variables are accessible by
VCL:
VCL VARIABLE ACCESS DESCRIPTION
Pot2_Raw Read Only Voltage measurement at pin 17, scaled
for the proper wiring
Brake_Pot_Output Read Only Hydraulic pot input value afterbeing scaled
for the proper wiring; for use in VCL program
when Hyd Throttle Type = 5
OS_Hyd_Throttle Read Only Hydraulic pot value after mapping, to be
used in VCL when VCL Hyd Throttle Enable
= On and Hyd Throttle Type = 1–4
VCL_Hyd_Throttle Read/Write VCL-accessible hydraulic throttle command
Hyd_Throttle_Multiplier Read/Write Multiplies or divides the throttle signal
Hyd_Throttle_Offset Read/Write Provides a +/- offset to the throttle signal
Mapped_Hyd_Throttle Read Only Hydraulic throttle pot value after mapping
Pump_Throttle Read Only Pump command resulting from hydraulic
throttle processing
Hyd_Inhibit_Type Read/Write Decides which type of HPD check is
performed on the hydraulic throttle signal
DC_Pump_Current_Limit Read/Write Current limit for the DC pump
Pump_Output Read Only Final pump command
7 — VCL
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