Siemens LC 500 Analog Signalling Mode 2-state menu level, Appendix A, Menu, Affected, Description

Appendix A

Lower Threshold Setting (2-state mode)

The Lower Threshold Setting is the % of range below which the probe is considered uncovered. In order to switch the output signal, the corresponding delay time has to be met (Menu 04).

The loop-current control (Menu 07) must be in 2-state mode for this menu to display the Upper Threshold Setting in percent. As an extra identifier, a downward ramp is displayed to the right of the value.

Menu	Affected	Rotary	Left			Added
		Switch		Mode			Description	Values
Item	by:	Position	Arrow			Indicator
						Downward	Lower	% of
				2-state		ramp at right	Threshold
								range
						of value	Setting
06	07	6	Off
								Display
				Analog	*			shows
								- - - -

1.Set the loop-current control (Menu 07) to 2-state mode.

2.Set the rotary switch to 6.

3.Press the RED (+) or BLUE (–) button to increase or decrease the value. or: Press and hold a button to start a repeat function.

Analog Signalling Mode (2-state): menu level 0

Note: Menu 08 has precedence over the settings in Menu 07.

The factory setting is for Analog mode (the loop-current is proportional with the percentage of the range). When no buttons are pressed, the LCD displays the current mA value.

2-state Signalling Mode provides a 4 mA or 20 mA output. The settings are relative to a covered probe:

•C: Hi selects a 20 mA signal for a covered probe, which switches to 4 mA if the probe becomes uncovered.

•C: Lo selects a 4 mA signal for a covered probe, which switches to 20 mA if the probe becomes uncovered.

Page 64 SITRANS LC 500 – INSTRUCTION MANUAL 7ML19985GE01