NEG : Address Negative Edge Detection

NEG : Address Negative Edge Detection

Parameter	Data Type	Memory Area	Description
<address1>	BOOL	I, Q, M, D, L	Signal to be checked for a negative (falling) edge change.
M_BIT	BOOL	Q, M, D	The M_BIT address specifies the edge memory bit in which the previous signal state of NEG is stored. Only use the process input image I memory area for the M_BIT when no input module is already using this address.
Q	BOOL	I, Q, M, D, L	One-shot output.

Description

The Address Negative Edge Detection instruction compares the signal state of

<address1> with the signal state of the previous check that is stored in the M_BIT parameter. If a change from 1 to 0 occurred, output Q has the value 1, in all other situations it has the value 0.

Status Word

	BR	CC 1	CC 0	OV	OS	OR	STA	RLO	FC
writes	-	-	-	-	-	0	1	X	1