Hot standby
System redundancy
If two SIMA² subsystems are jointly operated, this redundant configuration is
designated as hot standby system redundancy. Both SIMA² subsystems can either
be located in a joint housing or in two separate housings.
In this version, both SIMA² subsystems are identified by SIMA A or SIMA B. Each
of these two SIMA² subsystems functions completely independently of the other
subsystem, since each system is equipped with an own power supply as well as
separate multi-touchscreens.
In standard operation, SIMA A always adopts system control while SIMA B is working
in standby mode, continuously monitoring the overall system. If SIMA A fails, SIMA
B takes over control and thus ensures the complete function including the
communication to the actuators and the host.
When selecting the configuration with separate housings, up to four loops are
supported. In turn, the configuration with one joint housing only supports one loop.
Figure 2: Hot standby system redundancy in separate housings (example)
7
SIMA² Master Station
MODBUS RTU, MODBUS TCP/IP to DCS
Identification
Summary of Contents for SIMA 2
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