Siemens SINUMERIK 840D sl Function Manual

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TE1: Clearance control11.6 ProgrammingSpecial Functions490 Function Manual, 09/2011, 6FC5397-2BP40-2BA011.6.5 Voltage offset, can be set on a block-specific basis (CLC_VOFF)SyntaxCLC_VOFF = Voltage offsetVoltage offset• Format: Real• Unit: Volts• Range of values: No restrictionsCLC_VOFF is an NC address and can therefore be written together with other instructions ina part program block.FunctionalityCLC_VOFF can be used to preset a constant voltage offset for clearance control, which issubtracted from the input voltage of the clearance sensor. The programmed voltage offsettherefore changes the setpoint distance between the workpiece and the clearance sensor oroffsets the operating point for clearance control.The quantitative effect of the voltage offset is dependent on the additional parameters forclearance control and can therefore not be standardized in a generally valid format.Instant of activationThe voltage offset is effective in the part program block in which CLC_VOFF has beenprogrammed or, if this block does not contain any executable instructions, in the next partprogram block with executable instructions.ResetWithin a part program, a voltage offset must be reset by means of explicitly programmingCLC_VOFF=0.0.RESET responseCLC_VOFF =0.0 becomes effective after a power on reset, NC RESET or end of program.