B&R Industries Provit 5000 User Manual - page 100
Provit 5000 User’s Manual
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Controllers • System Unit with Socket 7 (ZIF)
7.19 Maintenance Controller (MTC)
The MTC is a standalone processor system, which provides additional functions that are not
available with a "normal" PC. The MTC communicates with the PC via the ISA bus (using a
couple register). The address can be stored under the menu item "Additional Peripherals" (see
the "Additional Peripherals" section).
The MTC is responsible for the following tasks and components:
•
AT PS/2 keyboard
•
Panelware keypad modules
•
Operating data coverage (controller and display unit)
•
Temperature monitoring with fan regulation
•
Qualitative evaluation of the condition of the battery (good/bad)
7.19.1 AT PS/2 Keyboard
As shown in the block diagram, the keyboard is not operated directly by the keyboard controller
in the I/O controller, but rather by the MTC. It is therefore possible to plug an AT keyboard in and
out while the IPC is switched on (Hot Plug). Furthermore, the AT keyboard can be operated
parallel to connected Panelware keypad modules or to a keyboard on a display unit (also see
the "Using Panelware Modules" section).
Figure 52: Maintenance Controller (MTC) block diagram