G&L MMC-A2, Руководство по оборудованию

Страница: 45 / 192

Standalone MMC Control
G & L Motion Control Inc. MMC Hardware Manual 37
4.6 Machine Control Connection & Operation
This section provides theory-of-operation and connection information on the
Machine Control board, which is located on the right side of an MMC
Control.
Three lights on the front of the Control (Scan, Power, and Diagnostic)
provide operational and diagnostic information, as described in
Section 3.8
on page 24 .
The Machine Control Board does the following:
•
Performs diagnostic tests.
•
Checks the battery.
•
Performs routine maintenance tasks.
•
Executes the application program.
•
Communicates with the I/O.
•
Maintains communication with the workstation through the
PiCPro port.
•
Maintains communication with the user interface device through
the user port. (Details for this communication depend partly on
the type of interface device. Refer to the manual that comes with
the device.)
•
Provides Block I/O expansion capability.
The MMC has a flash chip on board that allows you to load an application
program into it. This is standard on the MMC. Having the application in the
standard flash chip ensures that you will not lose the application if the battery
fails. On power up, the application is transferred from the flash chip to RAM
as it is when directly downloaded from PiCPro.
To place the application in flash:
1. Compile the application into a hex file in PiCPro.
2. Use the Download Hex command in PiCPro to download the
application into flash.
Even though you have placed an application in flash, you can still download
and run a different application from PiCPro. However, when you cycle
power on the MMC, the application in flash will always be placed into RAM.