Parker iqan-mc3, User Manual

Page: 17 / 66

14
Safety concept
4 Safety
Instruction book, IQAN-MC3
The IQAN-MC3 module and output diagnostics.
There is also a common high-side switch that supply all outputs, that is used as an
additional shutdown path.
Because of the built in diagnostics and redundant switches, the architecture of the
output subsystem can be selected independent of any constraints set by the unit.
Internal diagnostics
The concept of the IQAN-MC3 is that the primary CPU is monitored by a second,
independent CPU; and they in turn are monitored by a completely separate safety
ASIC. The safety ASIC provides an independent alternate path to bring the system into
a safe state, via a safe path switch that cuts power to all of the power drivers.
To achieve good diagnostics, the IQAN-MC3 executes a high number of self-tests on
the processor, memory and peripherials; both during start-up and cyclically, during
operation.
MC3 internal diagnostics
MC 3
+BAT
Intern a l
di a gno s tic s
OUT 1