ABB 07KR51-A3.6 advanced controller 31 1SBP260014R1001

Introduction

The same 07KR51-HSB central unit can be configured with the three different operative modes, depending to the function wished in the redundant CS31 architecture: Hot-stand-by master,   Hot stand-by self remote central unit, is able to start alone if hot stand-by master central unit fails on power ON. Hot stand-by remote central unit, is able to starts only if previously the hot stand-by master central unit has started properly on power ON The hot stand-by master, and hot stand-by remote central units, as well as the remote units, may be positioned in any order on the bus.

The hot stand-by master central unit starts synchronization, sends a frame to hot-stand-by remote central unit, the cycle in hot stand-by remote central unit is adjusted by itself on several cycles times to be synchronized with hot stand-by master central unit. The hot stand-by remote central unit has to be in RUN mode. The synchronization can take some minutes. When the synchronization is done, the bit %O62.08 is set to 1 in the both hot stand-by central units, master and remote, this bit %O62.08 can be used for example in the both hot stand-by central units, master and remote to start program operation, with JUMP function block.

During this synchronization phase, the hot stand-by master central unit executes its own program. The program in both hot stand-by central units, master and remote can be different.

The cycle times in the both hot stand-by central units, master and remote have to exactly set to the same value.  

The both hot stand-by central units, master and remote read all digital and analog inputs from CS31 bus in the same cycle time. Only the central unit, who controls the CS31 bus, assigns the digital and analog outputs on the CS31 bus. The outputs in the other hot stand-by central unit are only assigned as internal variables.

Diagnosis & functions

All diagnosis on CS31 bus are available on the both hot stand-by central units, master and remote like remote unit disconnected, short circuit outputs, etc... If the hot stand-by remote central unit does not any traffic on the CS31 bus during one cycle time, the hot stand-by functions start. That means that the hot stand-by remote central unit starts control of inputs/outputs on CS31 bus, reset the bit %O62.08 to 0 and set the bit %O62.09 to 1 and assigns the outputs on CS31 bus according to the current result of the present program.   In case of an error in the hot stand-by master central unit, the hot stand-by remote central unit will take over within a maximum of 3 cycle times. That means that the inputs in the hot stand by remote central unit will remain with the same value during three cycle times before being refreshed. If the part of program in the both hot stand-by central units, master and remote who manage the outputs on CS31 are different, it could happen a discontinuity in the status of outputs. In case of conflict, like two masters on CS31 bus, the hot stand-by central unit configured previously in remote will be switch in hot stand-by remote central unit even if it is in master operation. If the central unit master goes in STOP mode, the CS31 bus outputs are reset to 0. And the hot stand-by function is not activated. The bit %O62.08 is reset to 0 in the both hot stand-by central units, master and remote. If the central unit master is again in RUN mode, the bit %O62.08 is reset to 1 in the both hot stand-by central units, master and remote and the cycle times are synchronized but values of variables in the both hot stand-by central units, master and remote can be different. If the hot stand-by remote central unit does not any traffic on the CS31 bus during one cycle time, the hot stand-by functions start. That means that the hot stand-by remote central unit starts control of inputs/outputs on CS31 bus, reset the bit %O62.08 to 0 and set the bit %O62.09 to 1 and assigns the outputs on CS31 bus according to the current result of the present program. If the part of program in the both hot stand-by central units, master and remote who manage the outputs on CS31 are different, it could happen a discontinuity in the status of outputs.