Siemens SINUMERIK Series Function Manual

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Z2: NC/PLC interface signals18.8 Software cams, position switching signals (N3)Extended FunctionsFunction Manual, 03/2013, 6FC5397-1BP40-3BA1 88918.8.2 Signals from NC (DB10)DB10DBX110.0-113.7 Minus cam signal 1-32Edge evaluation: No Signal(s) updated: CyclicSignal state 1 oredge change 0 → 1The switching edge of the minus cam signal 1-32 is generated as a function of the traversingdirection of the (rotary) axis and transferred to the PLC interface in the IPO cycle.Linear axis:The minus cam signal switches from 0 to 1 if the axis overtravels the minus cam in the negativeaxis direction.Modulo rotary axis:The minus cam signal changes level in response to every positive edge of the plus cam signal.Signal state 0 oredge change 1 → 0Linear axis:The minus cam signal switches from 1 to 0 when the axis traverses the minus cam in the positiveaxis direction.Modulo rotary axis:The minus cam signal changes level in response to every positive edge of the plus cam signal.DB10DBX114.0-117.7 Plus cam signal 1-32Edge evaluation: No Signal(s) updated: CyclicSignal state 1 oredge change 0 → 1The switching edge of the plus cam signal 1-32 is generated as a function of the traversingdirection of the (rotary) axis and transferred to the PLC interface in the IPO cycle.Linear axis:The plus cam signal switches from 0 to 1 when the axis traverses the plus cam in the positivedirection.Modulo rotary axis:The plus cam signal switches from 0 to 1 when the minus cam is overtraveled in the positive axisdirection.The described response of the plus cam applies under the condition:plus cam - minus cam < 180 degreesIf this condition is not fulfilled or if the minus cam is set to a greater value than the plus cam, thenthe response of the plus cam signal is inverted. The response of the minus cam signal remainsunchanged.Signal state 0 oredge change 1 → 0Linear axis:The plus cam signal switches from 1 to 0 if the axis overtravels the plus cam in the negativedirection.Modulo rotary axis:The plus cam signal switches from 1 back to 0 if the plus cam is overtraveled in the positive axisdirection.The described response of the plus cam applies under the condition:plus cam - minus cam < 180 degreesIf this condition is not fulfilled or if the minus cam is set to a greater value than the plus cam, thenthe response of the plus cam signal is inverted. The response of the minus cam signal remainsunchanged.