18
Chapter2
OS32C
User’s Manual
Operating States & Output Modes
Parameter Configuration
The configuration properties consist of two sections: Safety-Critical Parameters and Non-Safety Critical
parameters.
Safety Critical Parameters
External Device Monitoring (EDM)
External device monitoring is an important safety function. It verifies that the external control elements
are responding correctly.
The OS32C can operate with this feature enabled or disabled. To use external device monitoring, the
OS32C requires that a Normally Closed contact from each Control Element be fed back in for
monitoring. If these contacts do not respond as expected the OS32C will enter the lockout state and
turn off the safety outputs.
In the safety output ON state, the OS32C expects to see the external device monitoring input open. In
the safety output OFF state, the OS32C expects to see the external device monitoring input closed.
The external device monitoring inputs must change state within 300ms after a change of the OS32C's
safety outputs or lockout will occur.
Response Time
The response time of the OS32C is proportional to the number of scans. The safety outputs will
change from on to off within a preset response time. The response time can be set from 80ms to
680ms. The number of scans may be increased when operating the OS32C in a dirty environment to
avoid nuisance trips caused by floating particulate matter.
Table 2-6 Response Time Examples
If the response time is changed, re-calculation of the safety distance is required. This may require re-
configuration of the safety zones or re-installation of the OS32C. If the safety distance is not
appropriate for the application, the machine may not stop before the hazardous area is reached,
resulting in severe injuries.
Application Example Example of Response Time
Stationary (clean environment) 80ms
Mobile 80ms - 240ms
Stationary (Dirty environment) More than 240ms
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