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Standalone MMC Hardware Manual
Standalone MMC Control
version 15.1
Danaher Motion
4.3.1
Machine Control Board
The Machine Control Board and it’s related external connections is located on the
right side of the Control. The Machine Control Board contains the CPU. Ladder logic
programming is used for machine control. This board also provides a PiCPro Port
(RS-232 serial interface for communicating with a computer), User Port (RS-232/RS-
485 serial interface for communicating with a serial device), Block I/O Port (proprietary
serial interface for communicating with Block I/O Expansion Modules), and a General
I/O Port (16 DC outputs and 16 DC inputs).
4.3.2
Motion Control Board
The Motion Control Board and it’s related external connections are located on the left
side of the control. The motion control side of the MMC unit can be either an Analog
Servo board or a SERCOS board.
4.3.2.1
Analog
Servo board
The Analog Servo board provides conventional analog/digital interfacing for two or
four drives.
The typical signals needed to interface to an analog drive are provided by the analog
servo module. The drive command is in the form of an analog voltage (±10V).
Feedback is accepted from quadrature type encoders with differential outputs. Digital
I/O (+24 VDC) is used for drive signals such as enable, reset, and fault. Fast inputs
are provided for each encoder input and can be configured to latch encoder position
under various conditions.
The analog servo board is offered in both 2 1/2 and 4 1/2 axis configurations. An axis
is considered to be an analog output with a corresponding encoder input. In each
configuration shown in the following table, note that there is an extra encoder input.
This is referred to as a half axis.
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