Siemens Sitrans, LC 500 instruction manual Appendix A, Menu, Description, Position, Contact Closed

Digital Fault Signalling

Note: This signal has precedence over the settings on Menu 17.

Controls the solid-state switch response to a fault/failure and allows you to select either contact open or contact closed. With contact closed the solid-state switch will be on: with contact open the solid-state switch will be off.

While a button is pressed, the LCD displays F: cc1 (contact closed) or F: co (contact open). When the button is released an equal sign (=) indicating status replaces the colon, and the reading depends on the status of the probe.

Example: F = cc is selected (contact closed when fault is detected)

•If a fault condition exists when the button is released, the display changes from F: cc to F = cc.

•If no fault condition exists when the button is released, the display shows F: cc.

•If you press either button briefly, the LCD displays the current setting, in this case, F: cc.

Menu	Rotary	Left
	Switch		Mode		Description	Action	Values
Item	Position	Arrow
						Press and hold	Display
			Disabled	*			shows
						both buttons
							F: - -
					Contact Closed:	Press and hold	Display
18	8	On					shows
			Digital		switch on	RED (+) button
							F: cc
			Signalling
							Display
			Mode		Contact Open:	Press and hold
							shows
					switch off	BLUE (–) button
							F: co

Set the rotary switch to 8. Press the RED (+) or BLUE (–) button to change the setting. The disabled mode can be restored at any time by pressing both buttons simultaneously for more than one second.

1.A colon at the extreme left of the display appears while the button is pressed to indicate when a setting is accepted, for example : S: cc.

7ML19985GE01 SITRANS LC 500 – INSTRUCTION MANUAL Page 71

Appendix A