Software/ Programming
EXAMPLE 2
(continued/
8.3.4.2
The FAIL-SAFE STATE table controls the RTU outputs when the RTU detects a
loss of RF link. Because Example 2 has two entries in the SEND LIST, both FAIL-SAFE
states A & B are used. If RTU ID 1 detects a loss of RF link from RTU ID 2, outputs are
controlled according to FAIL-SAFE STATE A. If RTU ID 1 detects a loss of RF link from
RTU ID 3, outputs are controlled according to FAIL-SAFE STA TE B.
8.3.4.3
I/O CONFIG is Input/ Output control of the RTU displayed in the Programming
Software I/O confi
gu
ration screen.
8.3.4.3.1
In Example 2, RTU ID 1, Input l and Input 2; RTU ID 2, Input 1 and RTU ID3,
Input l are configured to be inverted digital inputs.
8.3.4.3.2
In Example 2, all four outputs of RTU ID 1 are used, RTU ID 2, Digital Output 1 is
used, and RTU ID 3, Digital Output l is used. The initial condition - the state an output is
forced to upon power-on -- is set for all relays to be open and all analog outputs to be
forced to O scale.
8.3.4.3.3
In Example 2, FROM ID is the ID number of the transmitting RTU; FROM ID
numbers are listed in the following 2 charts:
FROM ID
RTU ID 1
(TransmittinQ RTU !Dl
Diattal Ou nut 1
2
Ana!nnQ
�ut 1
2
Diaital Q11
nut 2
3
Analoao,
�ut2
3
RTUID2&
FROMID
RTUID3
/Transmittina RTU IDl
Diaital Qmnut 1
1
8.3.4.3.4
FROM LOC is the number of the input controlling the output; FROM LOC numbers
are listed in the following chart:
FROMLOC
RTU ID 1
IControllina lnoutl
Diaital Q1 rrnut 1
1
Diaital 01
ITT
ut 2
1
Analnn Ornnut 1
2
Analnn Outnut 2
2
( B-18)
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