Maple Systems MAPware-7000 - Manual (Page 26)

MAPware-7000 Ladder Logic Guide 18
1010-1041 rev. 00
Instruction 5- Falling Edge (Transitional Contact)
Expression:
Space Requirement: 1 line x 1 column Location Requirement: Left rail, Middle
Function:
When the input at last scan is ON and the input at this scan is OFF, the output is turned ON. This
instruction is used to detect the input changing from ON to OFF
Execution Condition:
Input Operation Output
OFF When the input state at last scan is OFF. OFF
When the input state at last scan is ON. ON
ON Regardless of the input state at last scan. OFF
Operand:
No operand is required.
Example:
Timing Diagram:
Coil Y0002 comes ON for only 1 scan when the device X0000 comes OFF .