Maple Systems MAPware-7000 - Manual (Page 31)

23 MAPware-7000 Ladder Logic Guide
1010-1041 rev. 00
Instruction 10- Negative Pulse Contact
Expression:
Space Requirement: 1 line x 1 column Location Requirement: Left rail, Middle
Function:
When the input is ON and the device A is changed from ON to OFF (ON at last scan and OFF at
this scan), the output is turned ON.
This instruction is used to detect the device changing from ON to OFF.
Execution Condition:
Input Operation Output
OFF Regardless of the state of device A. OFF
State of device A is OFF. A is OFF at last scan. OFF
ON A is ON at last scan. ON
State of device A is ON. OFF
Operand:
Coil or Bit Register Constant Index
Name X Y B S T. C. M
X
W Y
W B
W S
W
T C D I J K
M
W
A Device √ √ √ √ √ √
Example:
Timing Diagram:
B0100 comes ON for only 1 scan when X0000 is ON and X0003 changes to OFF .