KUUMIC OY
NETWORK CONTROL
MIMIC BOARD
5
3. OPERATION
3.1 INDICATOR ADDRESSING
Note:
Knowledge of the ANSI X3.28 protocol is assumed.
Data communication between the RKU5 Control Unit and the Control
Center (MicroSCADA) is done via asynchronous serial link (RS232)
by using the ANSI X3.28 communication protocol (see cable information
on Figure 3).
There are two address areas for writing and reading the states of the
indicators, one for seven segment displays and one for LED indicators.
The addresses for the LED indicators are formed using the formula:
write address of the LED-indicator =
(bus cable - 1) x 14 x 34 + (card number-1) x34 + pin + 5000
where
-
bus cable
is the cable number to which the LCM driver
of the LED indicator is connected (bus cables
are numbered from 1 to 16)
-
card number
is defined by the board-number-select-jumper
on the LED Control Module (1-14, see Figure 4)
-
pin
is the pin number of the LCM to which the LED indicator
is connected (1-34)
The led addresses starts from 5001 dec. and continues to 12617 dec.