MC300
Microcontroller
BLN-95-9076-2 Issued: April 2003
DESCRIPTION
The MC300 Microcontroller is a multi-loop controller that is environmentally
hardened for mobile off-highway control system applications. The MC300
Microcontroller has the response speed and capacity to control multiple electro-
hydraulic control systems either as a stand-alone controller or networked with
other similar controllers via a high-speed Controller Area Network system.
The MC300 is ideally suited for dual-path hydrostatic propel systems incorpo-
rating closed-loop speed and horsepower control. Additionally, closed-loop
position control systems using servovalves and proportional flow control valves
are easily accomplished. Up to four bi-directional servo loops can be used.
The controller can interface with a wide variety of analog and digital sensors such
as potentiometers, Hall-effect sensors, pressure sensors, pulse pickups and
encoders.
The use of the I/O features and the control actions performed are defined by
firmware installed in the MC300's program memory. The firmware is typically installed by downloading the desired code from
another computer via the RS232 port. Re-programmability provides a high level of device function flexibility. Either factory or
in-field programming is possible.
The MC300 controller consists of a circuit board assembly inside of an aluminum die-cast housing. Three connectors,
designated as P1, P2 and P3 are provided for electrical connections. P1 (30 pin) and P2 (18 pin) are the main I/O and power
connectors; together they mate to the 48 pin board-mounted header, which protrudes through the bottom of the enclosure.
P3 is a circular connector for RS232 communications such as reprogramming, displays, printers and terminals.
FEATURES
• Multi-loop control capability for control of (4) bidirec-
tional servo loops or (2) bidirectional and (4) unidirectional
loops.
• Powerful 16 bit Infineon C167 microcontroller:
- Fast,
- Versatile,
- Controls multiple machine functions with fewer parts.
• Controller Area Network (CAN) provides high speed
serial communications with up to 16 other CAN compat-
ible devices and meets the speed requirements of SAE
network Class C specifications.
• Rugged aluminum die-cast housing withstands the en-
vironmental rigors typically found in mobile applications.
• Four-character LED display provides information for
setup, calibration, and troubleshooting procedures.
• Flash memory accessible through a dedicated RS232
port. Allows programming without changing EPROMs.
• Hardened power supply operates over the full range of
9 to 36 Volts with reverse battery, negative transient,
and load dump protection.
• Convenient RS232 port connector for data communica-
tion with other devices such as displays, printers,
terminals, or personal computers.
• Expandable via an internal 50 pin connector for custom
I/O boards.
ORDERING INFORMATION
• For complete hardware and software ordering informa-
tion, consult the factory. The MC300 ordering number
assigns both hardware and software.
• For product structure information see page 5.
• Mating I/O connector: order part number K12674 (bag
assembly).
• Mating RS232 connector: order part number K13952
(bag assembly).
© Danfoss, 2013-09 BLN-95-9076-2 1
2
SOFTWARE FEATURES
MC300 software architecture is designed to utilize
Danfoss state-of-the-art application software engineering
tools including the Kernel operating system, Danfoss
Control Objects and Packages, and WebGPI graphical user’s
interface. Danfoss software engineering methodolRJ\
allows application software transportability across
microcontroller platforms and facilitates rapid engineering of
a wide range of mobile machine control solutions including:
• Engine anti-stall and load controls
• Automotive control
• Wheel assist
• Closed loop speed control
• Pressure control
5 Vdc regulator for external sensor power (up to 0.5
amp) which is short-circuit protected.
MEMORY
See Hardware Structure, page 5.
LEDs
Four character alphanumeric LED display; each char-
acter is a 5x7 dot matrix.
Two LED indicators, one LED used as a power indica-
tor, the other LED under software control for use as fault
or status indication.
ELECTRICAL CONNECTIONS
48 pin board mounted Metri-Pak I/O connector mates
with a 30 pin and 18 pin cable connector.
6 pin circular MS connector for RS232 communication.
ENVIRONMENTAL
OPERATING TEMPERATURE
-40°C to +70°C (-40° F to 158° F).
MOISTURE
Protected against 95% relative humidity and high pres-
sure washdowns.
VIBRATION
5 to 2000 Hz with resonance dwell for 1 million cycles for
each resonant point run from 1 to 10 gs.
SHOCK
50 gs for 11 ms in all 3 axes for a total of 18 shocks.
ELECTRICAL
Withstands short circuits, reverse polarity, over voltage,
voltage transients, static discharges, EMI/RFI and load
dump.
INPUTS
Four analog (DIN 0, 1, 2, 3) (0 to 5 Vdc) intended for
sensor inputs (10 bit resolution). Protected against shorts
to ground. Two inputs available with 14 bit A/D resolu-
tion.
Four speed sensors (PPU 0, 1, 2, 3) (dc-coupled) for use
with solid state zero speed pulse pickups and encoders,
any of which can be configured as general purpose
analog inputs.
One speed sensor (PPU 4) (ac-coupled) for use with
alternators or variable reluctance pulse pickups.
Nine digital inputs (DIN) for monitoring external switch
position status for pull up (to 32 Vdc) or pull down (to <1.6
Vdc).
Four optional membrane switches (DIN 12) located on
housing face.
OUTPUTS
Two low current/bidirectional current drivers (±275 mA
maximum into a 20 ohm load). Protected for shorts to
ground.
Four high current 3 amp drivers, either ON/OFF or under
PWM control. These can be used to drive 12 or 24 Vdc
on/off solenoids, servo valves or proportional valves.
Short circuit limited to 5 amps. (Now includes current
feedback.)
Optional display.
COMMUNICATION
Controller Area Network (CAN) for communications with
other CAN compatible devices. Supports CAN 2.0A/
2.0B standards.
RS232 port connected through a 6 pin MS connector.
POWER SUPPLY
Voltage range 9 to 36 Vdc.
TECHNICAL DATA
BLN-95-9076-2
• Closed loop dual path control
• Position control such as machine elevation, gravity
reference and coordinated cylinder position
• Steering control for auto steering and coordinated steer-
ing requirements
• Application rate control
• Networking