Safe Transmission Of Joystick Angle Position; Safe Finger Function (Button Auto-Guidance); Monitoring Of Force Feedback Direction; Monitoring Of Operator Notification - Danfoss PLUS+1 JS1-H User And Safety Manual

User and Safety Manual
PLUS+1® JS1-H Steer by Wire
Functional Safety
18 | © Danfoss | December 2022
Monitoring Function
1. Monitor Direction of Force Feedback
2. Monitor Operator Notification

Safe transmission of joystick angle position

The joystick's single axis angular position in range of -30° to +30° is transmitted periodically via CAN (see
CAN Protocol on page 11).

Safe finger function (Button auto-guidance)

The state of the Safe Finger Function is transmitted periodically via CAN (see

Monitoring of force feedback direction

A monitoring function that monitors force and direction of the grip torque.
Note: This function prevents the motor shaft from moving more than a defined amount in the
unintended direction. (IEC 61800-5-2:2016, sec. 4.2.4.11)

Monitoring of operator notification

A monitoring function that monitors the operator notification to ensure that the machine operator is
correctly notified, in case of a failures only.

Joystick safety perameters

Safety parameter
SIL
PFH
Component type
SFF
DC
Architecture /category
Architecture /category
Monitoring of Force Feedback
Proof test interval/mission time
Reliability handbook
B10d Joystick
B10d Safe Finger Function (Button
Auto-Guidance)
AgPL/PL
MTTFd
DCavg
Category
Category for
Monitoring of Force Feedback
Fault reaction/risk mitigation
1. Signal Safety Error
3. Force Feedback Safe Stop
1. Signal Safety Error
Specification Description
2
4,2 ∙ 10-8 [1/h]
B
98 %
IEC 61508:2010
98 %
1oo2D
1oo1
8 Hours
Siemens SN29500 Calculations are performed at an average temperature
equal to 80 °C
17.000.000 Mechanical Joystick
[cycles]
1.000.000 [cycles] Mechanical Joystick Safe Finger Function (Button Auto-
Guidance)
d Maximum achievable performance level
513 years
ISO 13849:2014/2015
ISO 25119:2018/2019
98 % ISO 13849:2014/2015
3
ISO 13849:2014/2015
ISO 25119:2018/2019
2
ISO 13849:2014/2015
ISO 25119:2018/2019
Safety Response Time
370 ms
170 ms + OPN pattern period (8s)
CAN Protocol on page 11).
AX436683569858en-000101