Siemens sinumerik 840D sl Function Manual

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Detailed description2.7 Extended stop and retract (ESR)Special functions: Axis Couplings and ESR (M3)142 Function Manual, 11/2006, 6FC5397-2BP10-2BA0$AC_ESR_TRIGGER (NC-controlled)• NC controlled shutdown is activated by corresponding parameterizing of the followingmachine data by setting the control signal "$AC_ESR_TRIGGER":MD37500 $MA_ESR_REACTION = 22Prerequisite: Enable.• NC controlled retraction is activated by corresponding parameterizing of the followingmachine data andPOLF and POLFMASK in the parts program by setting the controlsignal "$AC_ESR_TRIGGER":MD37500 $MA_ESR_REACTION = 21Prerequisite: Enable.2.7.9 Power failure detection and bridgingDetectionA power failure can be detected if the mains supply monitoring of the connected actuator isused as an external source via terminal 73 of the E/R module of SIMODRIVE 611D I/RFmodule (e.g. external sources: NCU input or terminal box).DelayThe time delay until the mains supply monitoring relay picks up, is approximately 10 - 15 ms.After energizing of the relay 1/2 IPO cycle (minimum) to 3 IPO cycles (maximum) elapse.This results in the time for power failure recognition:Worst case: approximately 120 msBest case: approximately 15 msLimits of DC link overvoltageThe intermediate circuit is monitored for the following voltage limits: