M5: Measurement
7.7 Simulated measuring
Extended Functions
Function Manual, 03/2013, 6FC5397-1BP40-3BA1
527
7.7.3 External switch request
Function
The "external switching request" is selected using the NCK specific machine data by
entering the number (1...8) of the digital output being used:
● MD13230 $MN_MEAS_PROBE_SOURCE = <number of the digital output>
The probe signal is triggered by controlling the configured digital output. It is not necessary
to hard-wire the digital output to a measuring input.
The rising edge of the switching signal for probes 1 and 2 is generated by setting the digital
output. The falling edges are generated by resetting the digital output.
The measured value is the actual value of the axis at the instant in time that the switching
signal programmed in the measuring block occurs (rising / falling edge).
Digital output: Configuration
The following machine data must be set to be able to use digital outputs for simulated
measuring:
● MD10360 $MN_FASTIO_DIG_NUM_OUTPUTS = 1 (number of active digital NCK output
bytes)
● MD13120 $MN_CONTROL_UNIT_LOGIC_ADDRESS = 0 (logical address, SINAMICS-
CU)
Digital output: Setting
The configured digital output can be set in a synchronized action:
WHEN <condition> DO $A_OUT[<number of digital output>] = 1
Examples
Digital output used: MD13230 $MN_MEAS_PROBE_SOURCE = 1
Example 1: Channel-specific measuring in 2 axes
Program code Comment
N10 G01 G90 $A_OUT[1]=0 ; Preset digital output 1
N15 WHEN $AC_DETW<=10 DO $A_OUT[1]=1 ; Path residual distance <= 10 => Dig. output 1 = 1
N20 MEAS=1 X100 Y10 F100 ; rising edge, probe 1
Example 2: Axial measurement
Program code Comment
N10 G01 G90 $A_OUT[1]=0 ; Preset digital output 1
N15 WHEN $AA_IW[X]>=80 DO $A_OUT[1]=1 ; Axial setpoint >= 80 => Dig. output 1 = 1
N20 MEASA[X]=(1,1) X100 F100 ; rising edge, probe 1
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