45
As explained above at
paragraph 5.1
the local I/O DC/AC interfaces can drive 1 or 2 I/O
boards, a single I/O board contains 16 outputs and 8 inputs (16/8) and 2 I/O boards will
contain 32 outputs and 16 inputs (32/16). Therefore when defining local I/O interface DC or AC
we need to specify whether it is for 16/8 or 32/16 outputs and inputs.
For the radio RTU interface, apart from the address we must select the scanning rate by which
the
Master
will be scanning the radio
RTU
s, the options are: 1.25 sec; 2.5 sec; 5.0 sec; 10.0
sec. A complete description of the radio RTU system setup can be found at "
DREAM RF RTU
GENERATION III IV and IV.V
".
Physically the setting of the addresses on the interfaces is done by
dipswitches on the various interface boards. Notice that we are using
binary coding for the address setting. The binary coding is explained at
appendix A
below.
7.2.3
CONNECTIONS DEFINITION
7.2.3.1
During the following step we define where exactly each of the outputs and each of the inputs is
going to be physically connected, first the outputs and then the inputs. For each item we have
to supply the address of the interface, the number of the RTU (if the connection is through an
RTU or “RTU = 0” otherwise), and the specific location on the board (RTU board or I/O board).
The following drawing demonstrates the connections list as defined for the control system of
the example field above.
