Siemens LC 500, Sitrans instruction manual Appendix A, state High Fault Sig

Appendix A

Analog Fault Signalling (2-state)

Note:

•2-state mode must be selected at menu 07.

•This menu selection controls the current-loop fault/failure signal output. This signal has precedence over the settings on Menu 07.

When 2-state fault signalling is enabled, in the case of a fault the mA output is 3.6 mA or 22 mA1, depending on the setting. The mA output is viewed at menu 07.

Menu	Rotary	Left
	Switch		Description		Action	Values
Item		Arrow
	Position
			2-state Fault Signalling		Press both	Display
				*	buttons	shows
			(disabled)
					simultaneously	F: - -
			2-state High Fault Sig-			Display
08	8	Off			Press RED (+)	shows
			nalling (enabled)
						F: Hia
			2-state Low Fault Signal-			Display
					Press BLUE (–)	shows
			ling (enabled)
						F: Lo

a.If the LCD displays an equal sign (=) in place of the colon (:) this indicates that the loop-current is at fault/failure level. For example F: Hi becomes F= Hi.

Set the rotary switch to 8.

•To change the mode to 2-state High, press the RED (+) button for more than a second: the display reads F: Hi. In the case of a fault/failure the loop-current goes to

22.0mA.

•To change the mode to 2-state Low, press the BLUE (–) button for more than a second: the display reads F: Lo. In the case of a fault/failure the loop-current goes to

3.6mA.

1.For detailed information, see Fault Signalling on page 15.

Page 66 SITRANS LC 500 – INSTRUCTION MANUAL 7ML19985GE01