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 
 
6.2  Initial System Inspection 
 
 
 
 
 
 
Check all CAN cables for breaks, cuts or damage of any 
kind. 
 
 
 
 
 
 
Check connections at sensors and at the CAN Junction Box 
 
 
 
 
 
 
Check for water across the terminals in the CAN bus or 
inside the Junction Box 
 
 
 
 
 
 
Cycle System Power. A Waiting for Connection error can be 
caused by cycling the system power off and on too quickly. 
There must be a minimum of 10 seconds between powering 
off and back on again. 
  
 
 
 
 
 
 
Low system voltage can cause CAN bus errors. 
 
 
Off 
 
… Wait 10 Seconds… 
On