Dynamatic CES, Instruction Manual, Page: 10 / 38

10
CES DIGITAL MASTER REGULATOR (DMR)
The DMR Controller is a microprocessor based solid
state electronic control system operating in conjunction
with a CES press drive controller. It provides the
interface with the press manufacturer's control. It also
provides the safety circuits necessary to ensure proper
operation of the CES controller. Parameters are scaled
in user units when applicable.
Upon power-up in the field, the values will be set by the
factory. Some of these values will undoubtedly require
modification before the press will function properly. The
keypad must first be unlocked using the proper
password before these parameters may be changed.
See the instruction sheet for your particular EPROM to
learn how to unlock the keypad. The operator must next
present all of the operator alterable parameters from the
keypad programmer and/or they must be downloaded
from the serial interface. Once these values are set,
they are retained and need not be reentered unless the
values are to be changed or a new factory-programmed
NVRAM is installed. The NVRAM memory chip has a
battery internal to the chip that saves the information
stored in the memory during the powering down
situations of the control. This battery has a ten-year life.
However, the battery is only called upon to function
during periods where there is no power applied to the
control. Therefore, the life of the battery may greatly
exceed the ten-year period if there are no extensive
periods where the control is actually turned off. Once
the parameter values have been set, the system may be
run by activating the appropriate signals in the control
circuitry.
High voltage input and output signals for the
microprocessor are handled through optically isolated
solid-state relay modules, which are mounted on an
auxiliary relay mounting rack. All 120 VAC control
signals are converted to 5-volt TTL-logic levels, which
interface with the DMR. There are status LED’s located
next to each relay on the mounting rack. These LEDs
light up to indicate active (closed contact) inputs and
outputs. Refer to the electrical diagrams for the various
control functions passing through this relay mounting
rack.
DMR Assemblies
Part Number Function
15-779-11 Keypad Display
15-779-113, or -112 Resolver Interface
15-575-20 Main Controller PCB
15-814-3 Serial Interface
15-814-108 Dual D/A
15-775-2 First Fault Indicator
DMR Scaling PCBs
Part Number Function
15-869-1 Ac Line Voltage (in)
15-869-1 Brake Current Feedback (in)
15-869-1 Clutch Current Feedback (in)
15-869-2 Manual Run Speed (in)
15-869-100 Speed Feedback (output)
The typical DMR, part number 15-820-33 to 37, consists
of the assemblies listed in Table 2-1 and the analog
scaling printed circuit boards listed in Table 2-2. The