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CMA USER MANUAL
E-VLMB-TT005-E April 2019 www.eaton.com
CMA User Manual
7.4 VSM replacement
Replacement of the VSM requires no additional steps from
the user. The entire replacement procedure is automatic
(assuming successful completion). If the replacement was
not successful (for the VSM or any other device) an error
message will be generated.
7.5 Pilot valve fault masks
Each pilot valve has some built in fault masks that allow the
user to override an error that is being generated. In normal
use it is not recommended to override the fault masks,
they are only available to assist in debugging any problems
that may arise. Each port has its own fault mask. Each fault
can be isolated to give the user the most flexibility. The
following is a list of the fault masks:
0 = Mask all faults
1 = Minimum temperature fault
2 = Null position warning
4 = Stroke check warning
8 = PWM offset pressure side warning
16 = PWM offset tank side warning
32 = Training System ID warning
64 = Negative pressure sensor warning / Training
Timeout Fault
128 = Negative pressure sensor error / No Edge
Detection during PV Replacement Training
256 = Position control error
512 = Null Position error
1024 = Pressure error
The fault masks are set up in powers of two to allow the
user to turn on or off any combination of the masks. As an
example, if the user wants to see only position error faults
and minimum temperature faults, they would set the fault
mask to 513 (1000000001b).
7.6 Inlet controller fault masks
Similarly to the pilot valves, the inlet controller also has
fault masks. The following is a list of the inlet controller’s
fault masks:
0 = Mask all faults
1 = Variable displacement training ramp timeout error
2 = Invalid variable displacement training parameters
4 = Spool not moving during airbleed
8 = Pressure control error
16 = Pump margin different than during training error
32 = Spool stroke error
64 = PWM offset error
128 = PWM offset training timeout error
256 = Position control error
512 = Negative pressure sensor warning
1024 = Negative pressure sensor error
