
Safety engineering
Safety functions
Safe operation mode selector
53
EDS94AYAF EN 1.0
1.3.16
Safe operation mode selector
1.3.16.1
Description
O
peration
M
ode
S
elector / OMS
The function provides a special operation of the drive. In the special operation the drive is
stopped (status 2). The drive can be traversed in the special operation via an enable switch
(status 3).
For the stop status in the special operation, the STO, SS1 or SS2 functions can be
parameterised.
For motion functions in the special operation, the SLS function (combinable with SDI) or
free movement (combinable with SLI function) can be parameterised. The parameterised
monitoring function will be automatically activated with the transition to the special
operation.
The special operation enables an override of the simple STO, SS1, and SS2 stop functions
by the enable switch.
Also in special operation, activated monitoring functions are continued to be executed. An
error detected in the monitoring functions, also in special operation, leads to the
parameterised error stop function. Depending on the priority, the parameterised stop
function of the monitoring function or the stop function of the special operation is
executed without approval.
An active emergency stop function is also executed in special operation.
The special operation can also be selected via the safety bus by the F−PLC, unless a safe
input is parameterised as operation mode selector.
The return to normal operation is only possible in the stop status. Since the drive is stopped
in status 2, the AIS acknowledgement is required for restart. The parameters for the restart
STO/SS1 or SS2 are used.
Note!
When returning to normal operation, the automatic restart is not permissible.
If "automatic restart" is parameterised, this can be prevented by special
measures, e.g. programming in the higher−level control.
Note!
The "safe enable switch" function serves to directly cancel/complete the
stopping times assigned to the stop functions.
Note!
Monitoring of the safely limited increment during special operation is active if
a value > 0 has been selected for C15203.