Latching relay, Comment | Siemens 6ED1050-1AA00-0BE8 specs

LOGO! functions

4.4 Special functions list - SF

View in parameter assignment mode (example):

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4.4.23Latching relay

Short description

Input S sets output Q, input R resets output Q again.

Symbol in LOGO!			Wiring	Description
			Input S	You set output Q with a signal at input S.
	56
6			Input R	You reset output Q with a signal at input R. If S and R
6
5		4
				= 1, the output is reset.

3DU
3DU			Parameter	Retentivity:


				/ = No retentivity
				R = The status is retentive.
			Output Q	Q is set with a signal at input S, and reset with a
				signal at input R.

Timing diagram

Switching response

A latching relay represents a simple binary element. The output value depends on the status at the inputs and on the previous output status. The following table shows the logic once again:

Sn	Rn	Q	Comment
0	0	x	The status is retentive
0	1	0	Reset
1	0	1	Set
1	1	0	Reset (takes priority over Set)

When retentivity is enabled, the current status of the output signal is retained after a power failure.

	LOGO!
228	Manual, 04/2011, A5E03556174-01

6ED1050-1AA00-0BE8 specifications

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Siemens 6ED1050-1AA00-0BE8 manual Latching relay, Timing diagram Switching response, Comment

Models: 6ED1050-1AA00-0BE8