Siemens LC 500, Sitrans Analog Output Signalling proportional or 2-state menu level, Indicator

Appendix A

Analog Output Signalling (proportional or 2-state): menu level 0

Analog mode (the loop-current) can provide either:

•a 4 to 20 / 20 to 4 mA output proportional to the percent of the range

or

•a 4 or 20 / 20 or 4 mA output, when 2-state mode is selected

Note: To set values for Upper and Lower Threshold Delay, and Upper and Lower Threshold Setting (2-state mode), the loop-current menu (07) must be in 2-state mode. When the loop-current control is in analog mode, the LCD displays only - - - - for these menu selections.

Upper Threshold Delay (2-state mode)

The Upper Threshold Setting controls the Activation delay: the amount of time that has to pass uninterrupted with the probe covered to a level above the Upper Threshold Setting before the timer expires. When the timer expires, the output signal complies with the setting from Menu 08 for a covered probe. Whenever the level drops below the Upper Threshold Setting before the timer expires, the timer is restarted.

As an extra identifier, an upward running A is displayed to the right of the value.

Menu	Affected	Rotary	Left			Added
Item	by:	Switch	Arrow	Mode		Indicator	Description	Values
		Position
				2-		Upward	Upper	in
						running A at	Threshold
				state				seconds
						right of value	Delay
03	07	3	Off
								Display
				Analog	*			shows
								- - - -

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

2.Set the rotary switch to 3.

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

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

Lower Threshold Delay (2-state mode)

The Lower Threshold Setting 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. When the timer expires, the output signal will comply with the setting from Menu 08 for an uncovered probe. Whenever the level rises above the Lower Threshold Setting before the timer expires, the timer is restarted.

As an extra identifier, a downward running A is displayed to the right of the value..

Page 62 SITRANS LC 500 – INSTRUCTION MANUAL 7ML19985GE01