Redundancy Control With Caex Plus - Siemens SICAM AK Manual

Switchover runs at a global switchover
Only valid for global redundancy switchover.
The message can be parameterized in the OPM (SICAM 1703 + Ax 1703 system functions)
under Redundancy return information message with the attribute
Return_inform_function_(RED) (switchover runs at a global switchover).
A set binary information means, that the switchover is not yet completed. That means, that not
all system elements in the automation unit have the same redundancy state.
Keyswitch of the SCA-RS (system A active, automatic, system B active)
In the case that a SCA-RS voter is used, this message returns the respective position of the
key-operated switch.
Listening mode
The message can be parameterized in the OPM (SICAM 1703 + Ax 1703 system functions)
under Redundancy return information message with the attribute
Return_inform_function_(RED) (listening mode).
There is only one return information message, which is valid for the entire automation unit,
since the listening mode can only be set globally. Therefore BSE and SSE are irrelevant.
A set binary information means, that the automation unit is in normal mode.
1.6.3

Redundancy Control with CAEx plus

For a detailed description for the function (function block) call up the CAEx plus Help.
For the redundancy control in SICAM AK there are various vendor modules available in
CAEx plus:
•
TB_RED_GET_COMP_VALUE
Readout of the values for a cyclic comparison
•
TB_RED_SET_COMP_VALUE
Setting the values for a cyclic comparison
With the help of these two modules, eight analog values can be transmitted from the active
BSE to the passive BSE.
•
TB_RED_GET_TRIM_STATE
Readout of the states for the calibration from
•
TB_RED_SET_TRIM_STATE
Setting the states for the calibration
With the help of these two modules, 32 binary values can be exchanged between the BSEs.
•
TB_RED_GET_TRIM_VALUE
Readout of the integral values for the calibration from
•
TB_RED_SET_TRIM_VALUE
Setting the integral values for the calibration
SICAM RTUs, SICAM AK Redundancy
DC2-026-2.07, Edition 10.2016
Unrestricted
Redundancy via SCA-RS
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