Joystick safety
For a system to operate safely it must be able to differentiate between commanded and uncommanded
inputs. Take steps to detect and manage joystick and system failures that may cause an erroneous
output.
For safety critical functions Danfoss recommends you use an independent momentary action system
enable switch. You can incorporate this switch into the joystick as an operator presence switch or can be
a separate foot or hand operated momentary switch. Disable all joystick functions that the joystick
controls when this switch is released.
Ensure the control system looks for the appropriate system enable switch input before the joystick is
displaced from its neutral position. Enable functions only after receiving this input.
Applications using CAN joysticks should continuously monitor for the presence of the CAN messages on
periodic basis. Messages are to be checked frequently enough for the system or operator to react if the
CAN messages lose priority or are no longer received.
PWM joystick outputs will return to zero output if the joystick’s embedded microcontroller detects a
measurement error between the redundant shaft position sensors. Applications using the PWM joystick
option should be designed to ensure a safe machine state exists in the event a joystick output goes to
zero due to an error.
JS6000 connector pin assignments general information
JS6000 Joystick base pin assignments are a function of the following options:
•
Type of shaft position sensor (potentiometer or Hall)
•
Electrical output (analog or CAN)
•
Grip type
Base pin and connector assignments are different for the potentiometer and Hall sensor options.
In all cases, grip pin assignments are dependent on the type of grip and the number of grip options that
are selected.
Refer to
CAN output connector pin assignments
on page 35.
Refer to
CAN+ and PWM output connector pin assignments
on page 36.
Refer to
Potentiometer sensor with analog output connector pin assignments
on page 38.
Refer to
Hall effect sensor with analog output pin assignments
on page 40.
Technical Information
JS6000 Joystick Base
Product installation
34
520L0760 • Rev 1102 • November 2015
