Instruction manual

17
0228 Creep Speed Not Reached Before Stop Angle
Fault - During a stop-on-top sequence, the creep
speed is not reached before the press reaches
the stop angle.
When any stop now fault is generated, the CES
controller functions in the following manner.
A stop now fault will be issued to the press control
immediately upon sensing any of the above faults. The
press control should initiate an emergency stopping
sequence that includes setting the holding brake and
removing the enable from the CES controller (among
other items). Speed reference will be set to zero. The
clutch converter is inhibited. The clutch contactor drop
out timer is initiated immediately upon detection of a stop
now fault. The timer will cause the clutch contactor to
drop out in 450 milliseconds by removing the clutch ON
command to the contactor. The brake will be energized
by the negative speed error, while the speed is above
zero, to provide decelerating torque.
Stop-On-Top Faults
- There are 8 stop-on-top faults.
They will cause the CES controller to execute a normal
stop upon reaching the top of the press stroke. These
faults do not require an emergency stop, but should stop
the press at the top during the next cycle in order for the
problem to be investigated. Each of these faults is
described as follows:
0313 Under-speed Fault - If the tach signal is 3% less
than the speed reference, an under-speed fault
will exist. The time allowed to be under speed is
adjustable from 0 to 5 seconds. Reset at speed
error within 3%.
0314 Clutch and Brake Current Overlap - If clutch and
brake current are present at the same time, a
clutch and brake current overlap fault will exist.
The overlap time allowed is 0.5 second and the
amount of overlap allowable is 5%.
0315 Clutch Current Fault - If clutch current is present
for too long, a clutch current fault will exist. The
time allowed is adjustable from 3 to 20 seconds
and the current allowable is 20%. The CES
controller cannot be enabled until cool down
time has expired.
0316 Brake Current Fault - If brake current is present
for too long, a brake current fault will exist. The
time allowed is adjustable from 3 to 20 seconds
and the current allowable is 20%. The CES
controller cannot be enabled until cool down tine
has expired.
0317 Inch Change Fault - If the inch command signal
is changed while enable is present, an inch
change fault will exist.
0318 Micro Inch Change Fault - If the micro inch
command is changed while enable is present, a
micro inch change fault will exist.
0319 Reverse Change Fault - If the reverse command
is changed while enable is present, a reverse
change fault will exist.
0329 Parameter Out of Limits Fault - If a downloaded
parameter is outside of established limits a
parameter out of limits fault will exist. When
commanded to use the new parameters that
contain a parameter that is outside of the
established limits, the controller will operate at
the established limit of the incorrect parameter
and create a stop-on-top fault.
When any stop-on-top fault is generated, the CES
controller functions in the following manner:
A stop-on-top fault output is issued to the press control.
A normal stop sequence will be initiated (normal stop-on-
top operation). At the completion of this sequence, the
drive will be in a fault mode condition and cannot be
restarted without resetting the fault. If the press does
not reach the stopping angle in 1.5 times the press cycle
period, the CES controller will issue a stop now fault.
Control Faults
- A microprocessor watchdog timer
monitors the microprocessor and the power supply for
proper operation. The CES controller issues a control
failure fault any time either one fails or goes out of
tolerance. This type of fault will produce a Stop Now
stop.
FAULT PRIORITY ENCODER
Various conditions have been selected to be monitored
as faults. The faults, in order of priority, are as follows:
- Run Signal is Present
0 Push Reset
1 External
2 Brake Free Wheel
3 Low Line
4 Brake Over-current
5 Clutch Free Wheel
6 Line/Microprocessor
7 Clutch Over-current
In order to read these faults accurately, a PWM Fault
Indicator board, No. 15-775-2, must be plugged into the
corresponding header on the DMR. For a quick
reference during operation, refer to Table 3-3.
VII. SET-UP/TEST MODE
The test mode can only be accessed when the main
motor is OFF and press power is padlocked OFF. In
order to enter, use, and exit the test mode, the following
steps must be followed in the order given: