Siemens LC 500, Sitrans instruction manual Lower Threshold Delay solid-state output, Value

Appendix A

Lower Threshold Delay (solid-state output)

The Lower Threshold Delay controls the Deactivation delay: the amount of time that has to pass uninterrupted with the probe covered to a level below the Lower Threshold Setting before the timer expires. After the timer expires, the output signal will comply to the setting from Menu 18 for an uncovered probe. Whenever the level rises above the Lower Threshold Setting before the timer expires, the timer is restarted.

When the solid-state switch control (Menu 17) is disabled, menu 14 displays only - - - -. When the solid-state switch control is enabled, this menu displays the Deactivation delay in seconds. As an extra identifier, a downward running d is displayed to the right of the value.

Menu	Affected	Rotary	Left				Des-
Item	by:	Switch	Arrow	Mode		Identifier	cription	Values
		Position
				Solid-state		Downward	Lower	Range: 0
				switch con-		running d at	Threshold	to 100
14	17	4	On	trol enabled		right of value	Delay	(seconds)
				Solid-state				Display
				switch con-	*			shows
				trol disabled				- - - -

First select the solid-state switch output at menu 17 (contact open or contact closed).

1.Set the rotary switch to 4.

2.Press the RED (+) or BLUE(–) button to increase or decrease the value.

3.or: Press and hold a button to start a repeat function.

4.or: Press both buttons simultaneously to toggle the value between minimum (0) and maximum (100).

Upper Threshold Setting: (solid-state output)

The Upper Threshold Setting is the % of range above which the probe is considered covered. In order to switch the output signal, the corresponding delay time has to be met (Menu 13).

When the solid-state switch control (Menu 17) is disabled, menu 15 displays only - - - -. When the solid-state switch control is enabled, menu 15 displays the Upper Threshold

setting in percent. As an extra identifier, an upward ramp	is displayed to the right of
the value.

Page 68 SITRANS LC 500 – INSTRUCTION MANUAL 7ML19985GE01