Manual – MOVIDRIVE® MDX61B Safety Module Option MOVISAFE® DCS..B
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Typical response times
Appendix
12.6.2 Typical response times of the DCS31B/32B option
The following table lists the response times of the DCS31B/32B option.
The calculation of response times is based on the cycle time of the system. The cycle
time (T_cycle) of the DCS31B/32B option is 25 ms. The specified response times cor-
respond to the maximum run time for the specific application within the DCS31B/32B
option. Depending on the application, additional application-specific response times for
the sensors and actuators used have to be added to obtain the total run time.
INFORMATION
If the "overspeed distance monitoring" filter is used, the response time will increase
depending on the set distance.
Function Response
time [ms]
Explanation
Reading-in a digital NC contact and
further processing by the internal
safety controller
58 The DCS31B/32B option recognizes an NC contact
within one cycle. Another cycle is needed for fur-
ther processing including the switching of an out-
put.
Reading-in a digital NO contact and
further processing by the internal
safety controller
75 For a NO contact to be recognized as active ("1"),
an active signal level must be present at the input
for an entire clock cycle of the DCS31B/32B
option. In the worst case, sampling will take two
cycles to make relevant information available for
internal processing. As another cycle is needed for
processing the input signal, this results in a total
signal run time of three cycles.
Note: Try to avoid using NO contacts in safety cir-
cuits!
Response of an already activated
monitoring function including logic
processing for position and speed pro-
cessing
50 For a monitoring function that has already been
activated via ENABLE, the DCS31B/32B option
needs one cycle to calculate the current speed
value. In the next cycle, the information is further
processed and output by the PLC after the monitor-
ing function has been calculated. This can lead, for
example, to the switching of an output once the
programmed logic has been performed.
Response of an already activated
monitoring function including logic
processing for acceleration process-
ing
75 For a monitoring function that has already been
activated via ENABLE, the DCS31B/32B option
needs two cycles to calculate the current accelera-
tion value. In the next cycle, the information is fur-
ther processed and output by the PLC after the
monitoring function has been calculated. This can
lead, for example, to the switching of an output
once the programmed logic has been performed.
Response of a monitoring function
activated by an external input includ-
ing processing of the safety controller
when using a NC contact.
83 Signal processing of an input lasts one scan cycle.
Another cycle is needed to set the ENABLE input
for the required monitoring function. In the next
cycle, the monitoring function and behavior of the
result is calculated and, if necessary, the output is
activated.
Response of a monitoring function
activated by an external input includ-
ing processing of the safety controller
when using a NO contact.
100 For processing the digital input signal, two cycles
are required in the worst case. Another cycle is
needed for setting the ENABLE input of the
required monitoring function. In the next cycle, the
monitoring function and processing of the result is
calculated and, if necessary, the output is acti-
vated.
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