4 commissioning
BU 0630 en-2020 37
Pos: 22 4 /Anlei tung en/El ektr onik/S afety /5. In betrieb nahm e/In betrie bnahm eschr itte SS 1_01 [S K 500P ] @ 44\mod_1594796228021_388.docx @ 2646000 @ 2 @ 1
4.2 SS1-t commissioning steps
• A safety output of the protective switching device is connected to the Safety Digital Input (see 2.2.2
"Safety Digital Input").
It is recommended that a two-conductor shielded cable is used and that the shield is correctly
connected, see 2.4.5 "Exclusion of wiring faults".
SK 510P, SK 540P
The Safe Pulse Block is connected to a time-delayed safety output of the protective switching device.
It is recommended that a separate two-
wire shielded cable is used. The cable shield must be
connected at both ends, see 2.4.5 "Exclusion of wiring faults".
SK 530P, SK 550P with SK CU5-STO or SK CU5-MLT
Two time-
delayed safety outputs of the protective switching device are connected with the two inputs
of the Safe Pulse Block.
It is recommended that a separate three-
wire shielded cable is used for the Safe Pulse Block and that
the shield is correctly connected, see 2.4.5 "Exclusion of wiring faults".
• The Safety Digital Input must be parameterised with the Quick Stop function (P424 = 2).
Danger of injury due to failure of SS1-t
The stopping characteristics of the drive can be influenced by various factors. Therefore, the “Safe
Stop 1” mode may possibly not be correctly complied with.
• The safety subfunction SS1-t must not be used in end applications in which failure of the SS1-t
may result in a hazardous situation.
• In order to prevent malfunction, a final validation in the course of commissioning must demonstrate
that the particular settings fulfil the requirements for the special intended use, and that the device
will at no time be operated outside of its rated data.
For the SS1-t function, the “Safety SS1 max. time” monitoring time (P423) must be parameterised
according to the requirements of the application. The delay time of the delayed safety outputs of the
protective switching device must be rated so that it is longer than the set monitoring time.
The actual stopping time for the drive depends on various factors. It may deviate from the
parameterised “Quick stop time” (P426) if, for example, one or more of the following events occur
during the active quick stop.
– Achievement/exceeding of the power limits of the FI
– Achievement/exceeding of one or more parameterised limit values (e.g. P112, P536, P537)
– Use of the direct current braking function “Instant d.c. braking” (P108).
With use of the disconnection mode “Instant d.c. braking” (P108), the quick stop time is not
taken into account. The same braking time (resulting from the settings in P109, P110) is used
as for disconnection.
• In unfavourable cases, the drive cannot be stopped to a standstill during the parameterised
monitoring time. In this case an error is triggered and the inverter performs the fault response
function and runs down to a standstill.
• The following sequence results if the SS1-t function is correctly implemented:
To Next Page
Loading...
