WIKA Mobile Control LP  
1540 Orchard Drive 
Chambersburg, PA 17201 
 
qSCALE maestro (PLC v01.00.00) Service Manual / Issue E (HMI v1.0.0) 04/2018 / rbm.
 
Service : (717) 217-2250 
Parts / Sales : (717) 217-2269 
www.wika-mc.com 
 
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HIRSCHMANN MCS 
3  Description of the System 
The maestro system (also referred to as ‘RCL’) is a CAN bus system comprised of a central 
microprocessor unit, operating console, angle sensor, tilt sensor, load pin, and anti-two block 
switch.  All components and sensors are equipped with CAN bus controllers.  
 
When limits are reached an overload warning signal is generated at the operator’s console. At 
the same time, the Function Kick Out (FKO) outputs are deactivated thus ‘locking out’ the opera-
tor and stopping aggravating machine movements. The fixed data regarding the machine (ex. 
capacity charts, boom weights, centers of gravity, etc.) are stored in memory chips in the central 
processor unit. This data is the reference information used to calculate the operating conditions.