Redundancy via SCA-RS
SICAM RTUs, SICAM AK Redundancy
Unrestricted
81
DC2-026-2.07, Edition 10.2016
1.6.2
Redundancy Return Information Messages
Redundancy return information messages are user data messages with a parameter-settable
5-stage address (CASDU1, CASDU2, IOA1, IOA2, IOA3) and a fixed type identification (30 =
single point information), which, among other things, provide information e.g. about the
redundancy states of the individual system elements or the position of the key-operated switch
of the SCA-RS.
The messages can be parameterized in the OPM,
Tools
menu (
Types overview
entry,
Parameter
tab: under
SICAM 1703 + Ax 1703 -> System functions -> Redundancy return
information message)
.
The redundancy return information messages have the following parameters and can assume
the following values (in brackets):
•
CASDU1
(0-255)
•
CASDU2
(0-255)
•
IOA1
(0-255)
•
IOA2
(0-255)
•
IOA3
(0-255)
•
TI
, Type identification (single point information TI=30)
•
Return_inform_function_(RED)
(redundancy state, switchover runs at a global
switchover, keyswitch of the SCA-RS: system A active, keyswitch of the SCA-RS
automatic, keyswitch of the SCA-RS: system B active, listening mode)
•
BSE_(RED)
, Basic system element (C0-CPU to C16-CPU, M-CPU, not used)
•
PRE_(RED)
, Supplementary system element (PRE0 to PRE4, BSE itself, not used)
