Dynamatic CES, Instruction Manual, Page: 13 / 38

13
The I/O board of the CES controller opens a solid-state
relay contact for the control failure fault signal to the
press control.
CLUTCH ON (SIGNAL):
The clutch ON is a 115-volt output that drives the CR1
relay. A NO CR1 relay contact is in series with the 115
VAC power provided by the press control and a TD
contact. Activating the CR1 relay and the TD relay will
allow the clutch contactor to pull in after the press control
has given the clutch ON command.
The CR1 contactor is activated by the following
conditions:
1. Brake contactor is ON
2. Enable is present
3. No fault is present
4. Clutch contactor ON signal is present
Note: if the brake contactor drops out or clutch ON is
removed, CR1 drops out immediately. If the enable is
lost or either of the two emergency stop faults occurs, a
450-millisecond timer will be started, after which CR1 will
be dropped out. CR1 is also dropped out 450
milliseconds after a normal stop.
TD RELAY:
A TD relay contact is in series with the CR1 contact
closure to provide a redundant path for dropping out the
ac contactor with the loss of the enable signal. The TD
contact is closed when the enable input is present, and it
drops out 600 milliseconds after the loss of enable.
PRESS CONTROL INTERFACE - SERIAL PORT
The serial interface assembly makes it possible for the
DMR to communicate with another microprocessor or a
main computer. This communication link is an RS-422
assembly that is mounted directly to the main DMR
printed circuit board and is connected to the main board
by a ribbon cable. It can be utilized to set references
(i.e., speeds and angles) and to communicate diagnostic
information, faults, etc.
SIGNALS FOR CUSTOMER’S RECORDER
The CES controller provides four different buffered
signals at the terminals. They are as follows:
1. Clutch current
2. Brake current
3. Speed reference
4. Speed feedback
ANALOG METERS
The CES controller contains four analog meters to
provide the service engineer with necessary operating
parameters. They are as follows:
1. Clutch ammeter
2. Brake ammeter
3. Speed indication (SPM)
4. Elapsed time for clutch ON time
BRAKE CONTACTOR
A brake contactor is provided which will be closed under
simultaneous conditions of control power ON being
available and brake current fault not being present. The
brake contactor is opened 10 seconds after stopping on
top when a brake current fault is present.
PRESS OPERATING MODES
The CES controller includes 9 operating modes, as
described in detail below. Among these are the four
basic modes, employed in various combinations, as
follows: Run, Fault, Test and Ready.
I. RUN MODE (NORMAL)
The CES controller is in the run mode if the following
conditions exist:
1. Enable signal is present
2. NO fault is present
3. Reverse is not present
4. Inch is not present
5. Micro inch is not present
6. Clutch contactor ON is present
7. Brake contactor is closed
When in the run mode, the CES controller functions in
the following manner.
A clutch ON command closes the clutch contactor.
Upon initiation of the run mode, the drive reference
signal ramps up from an initial value that is adjustable
from 0 to 3 strokes per minute, at the initial acceleration
rate, until the drive reference equals or exceeds the
programmed reference. After this, the controller uses
the operating acceleration/deceleration rates. The initial
value of 0 to 3 strokes per minutes is adjustable at the
keypad. It is parameter No. 48.
The operating accel and decel rates consist of three
separately adjustable rates to minimize overshoot and
undershoot of the slide speed. The first accel/decel
rates are programmed to start by selecting the proper
press angle. The second and third accel/decel rates are
programmed based on a delta stroke per minute from
the set point. The second rate is adjustable to start up to
25% of rated speed before the set point. The third rate
is adjustable to start up to 15% of rated speed before the
set point.
When in the run mode, the speed reference follows the
profile set by the angles and speeds stored in the
parameter locations as listed in Table 2-3 (also see
Figure 2-5). Every angle and every speed must have an
assigned value.