Siemens D410 appendix Local measuring input Global measuring input

Commissioning (software)

4.6 Using drive-related I/Os by SIMOTION

Table 4-6	Comparison of local and global measuring inputs on the D410
		Local measuring input	Global measuring input
Measurement operation		With a signal edge at the relevant input,	With a signal edge at the relevant input,
		the current actual values of an encoder	the current actual values of one or
		connected to a control unit are	more encoders are measured using
		measured with positioning accuracy to	timestamp functionality with positioning
		determine lengths and distances.	accuracy in order to provide information
			for determining lengths and distances
			(possible with any encoders included in
			the project).
Configuration of the Measuring Input		The assignment of inputs is always	The assignment of inputs is not fixed
TO in the SIMOTION SCOUT		permanent depending on the hardware	depending on the hardware and is
		of the control unit and is performed	performed during the configuration of
		during the configuration of the	the Measuring Input TO using the
		Measuring Input TO using the	hardware address.
		measuring input number.
Measuring Input technology object		Yes	Yes
setting Single measurement
(Measurement jobs must be issued
individually for each measurement.
Several interpolation cycle clocks lie
between two measurements.)
Measuring Input technology object		(yes)	yes
setting Cyclical measurement		Although the Measuring Input TO can	The minimum separation between two
(The measurement is activated just		be requested to perform a cyclical	measurements is three servo cycles
once and runs cyclically until		measurement, it subdivides such a	(maximum two edges per
deactivated.)		measurement into the execution of a	measurement possible).
		series of single tasks. In such a case,
		the minimum separation between two
		measurements is several servo cycles.
Use of multiple Measuring Input TOs		No	Yes
on one axis/encoder, whereby these
can be active concurrently.
Listening Measuring Input TO		No	Yes
Measuring on virtual axes		No	Yes
Measuring on axes attached to a		No	Yes
different drive unit

A maximum of three probe inputs can be configured onboard on the D410.

102	D410
	Commissioning Manual, 08/2008 Edition