User Manual

• Monitoring the diesel engine speed
At diesel engine speeds below the idle speed, the drive is
switched to a fixed low output speed.
• Monitoring the inputs and outputs
The lines for setpoint inputs and outputs and the proportional
solenoid outputs are monitored for wire breaks and short
circuits.
In case of an error or if the safety switch is actuated, the
drive is turned off immediately.
An error lamp also lights up if there is an error.
Important features
• It is possible to switch between two joysticks for the setpoint
specification.
• The acceleration and deceleration times can be set sepa-
rately for the joystick deflection (without the intervention of
the open loop speed control) and open loop speed control
intervention.
• A switch in the vehicle can be used to switch the open loop
speed control on or off.
• The actual value of the diesel engine speed is acquired by a
speed sensor or via the CAN bus.
• The behavior of the drive is monitored by safety functions
such as the start condition and the diesel engine speed
monitor.
• The inputs and outputs of the controller (e.g. joystick) are
monitored for cable breaks and short circuit. In case of an
error or if the safety switch is actuated, the drive is turned off
immediately.
• Errors can be displayed via the connected error lamp.
• All errors that occur can be output with protocol SAE J1939
via the CAN bus interface.
• All errors that occur are stored in the controller and can
also be read out later in plain text using the BODAS service
diagnostic tool.
Figure 2: Typical configuration for the SPCA, open hydraulic circuit, diesel engine with CAN bus interface
Power supply
Ignition
switch
Controller RC2-2/21
with SPCA software
BODAS service
PC software
Diagnostics
socket
Error lamp
Safety switch
Engine
Variable pump
A11VO or
A7VO or
KVA
RS232
Fixed motor
A2FM or
A2FE or
A4FM or
A10FM or
MCR
Joystick 1
Joystick 2 active
Open loop speed control off
Forwards
Backwards
Joystick 2
CAN bus interface
4/16 Bosch Rexroth AG
Open and Closed Loop Speed Control SPC RE 95300/12.07