Main Processor Unit - ABB REG316 4 Series Operating Instructions Manual

REG 316*4 1MRB520049-Uen / Rev. C ABB Switzerland Ltd
2.5.

Main processor unit

The main processor runs the control and protection algorithms
as determined by the particular settings. It receives its data from
the A/D converter unit and the I/O unit. The results computed by
the algorithms are transferred either directly or after further logi-
cal processing to the binary I/O unit.
A 80486-based microprocessor is used in the main processor
unit 316VC61a or 316VC61b. The samples taken by the A/D
converter are pre-processed by a digital signal processor (DSP).
The interfaces for connecting an HMI PC and for communication
with the station control system (SPA, IEC60870-5-103) are
included. A PCMCIA interface with two slots facilitates
connection to other bus systems such as LON and MVB. The
flash EPROM's used as program memory enable the software to
be downloaded from the PC via the port on the front.
A self-monitoring routine runs in the background on the main
processor. The main processor itself (respectively the correct
operation of the program) is monitored by a watchdog.
2-7