Safety Integrated - Industry - Siemens

Plausibility check: Motion command for the speed
The SIMOTION controller must transfer a motion command to
the block via the input FD_CONTROL_MESSAGE, where 1 corresponds
to setpoint = 0 and 0 corresponds to setpoint 0. The
plausibility of these two signal states is checked by the block,
by opposing the signal FD_SPEED_SIMO. If the plausibility
check yields a negative result, the output ENABLE_AXIS is reset.
Plausibility check: Safe standstill and feedback
Safe drive standstill is triggered via the output ENABLE_AXIS.
The drive feedback stating that the Safe standstill function has
been activated has to be connected to the input block FEED-
BACK.
Safe standstill feedback
These two signals are checked for discrepancy by means of an
equivalent (identical signal states) evaluation. Non-equivalent
values (non-identical signal states) of up to 500ms are tolerated.
When the time discrepancy has expired, the output
ENABLE_AXIS is set to 0. The output can only be reset after restarting
the CPU. The current status of the inputs
ENABLE_AXIS and FEEDBACK can be visualized via the output
ERROR.
ERROR = 0 ENABLE_AXIS and FEEDBACK are equivalant
ERROR = 1 ENABLE_AXIS and FEEDBACK show non-equivalent
statuses when the time discrepancy of 500ms has expired.
Function Example No. MC-FE-I-004-V11-EN 455
Ex. No.
4