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68
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SSC-1500 Part Revolution Solid-State Control
SECTION 5—FAULT MESSAGES AND GENERAL MESSAGES
Fatal Fault Messages
(continued)
Table 5.1
(continued)
MESSAGE
DESCRIPTION/SOLUTION
RESOLVER NOT WORKING
Velocity is present but the resolver is not moving. Check for correct wiring to the
resolver connection on the SSC-1500 control module. Verify the resolver cable
is not run near high-voltage lines (motor leads). Possible circuit failure; consult
factory.
RESOLVER READ ERROR
Three successive reads of the resolver position failed to produce the same value.
Possible circuit failure; consult factory.
RESOLVER/SYNC FAULT
The resolver position doesn’t match the sync switch position as it should. During the
system setup reference cycle, the relationship of the resolver angle and the 30° sync
switch pulse is established. If this has changed, check the resolver chain or coupling
for tightness and make sure there is no backlash or slop. Check the resolver cable
and ensure that the sync switch input LED on the main control module is functioning
correctly. Rerun the press setup if necessary. See pages 50 - 51 for running the press
setup.
SYNC PROX CAN’T BE ON AT START
Reposition the resolver so the sync prox is not on at the top of the stroke. Make sure
the resolver shaft keyway if perpendicular to the base at TDC.
MOTION REFERENCE FAULT
The press cycle did not produce motion within the given reference time allotted.
Check that the press is running at full speed and the air pressure hasn’t dropped. If
this message persists, rerun the press setup from TDC and note the reference time
reported. Possible circuit failure; consult factory.
REFERENCE FAILED!
The palm buttons were released early during the reference cycle. Rerun the reference
cycle and hold the palm buttons until the press stops on its own. Verify resolver direction.
Put control in INCH mode and verify SPM is displayed when running.
REFERENCE FAILED!
SYNC PROX NOT DETECTED
The sync switch in the resolver housing did not come on during a cycle for the system
setup. The sync switch can only come on between 30° and 330°. The ideal location is
around 200° for most presses. Check the wiring for the resolver and check the LED on
the main CPU card for the sync switch input to ensure it is functioning. Ensure the press
is at TDC when doing the system setup. If needed, remove the chain or coupling from the
resolver drive and spin until the sync switch signal is not over top, and falls within 30° and
330°. Run the press setup again.
BATTERY FAILED
The battery back-up memory failed. Clear the fault. Turn off the power switch for 5 to
10 seconds. Turn it back on and proceed as normal. If message persists, the battery
may need to be replaced on the module. Possible circuit failure; consult factory.
LC CYCLE FLT
The light curtain cycle check wired to the MTS input on the light curtain(s) failed
to cycle on the upstroke. Check the LED for the K4 relay on the SSC-1500 control
module, and fuses F5 and F6 for the LC cycle output contacts.
