Allen-Bradley ProcessLogix 1757 Series User Manual

Publication 1757-RM810A-EN-P - May 2002
Functional Blocks 3-25
NOT
OFFDELAY
ONDELAY
Description Provides a NOT algorithm, meaning it performs an inversion function.
Function Reverses the state of a digital input (IN) such that the output (OUT) is the complement of the single input; therefore:
OUT = opposite of IN
If IN = ON, then: OUT = OFF.
If IN = OFF, then OUT = ON.
Truth Table IN
OFF
ON
OUT
ON
OFF
Inputs IN = Boolean value
Outputs OUT = complement of input signal (Boolean)
Parameters EUDESC
HIALM
IN
ORDERINCM
OUT
Description When the input state changes from ON to OFF, an internal timer starts counting down the delay specified by
DLYTIME. When it times out, the input is monitored again, and if it is still OFF, the output is set OFF, When the input
state transitions too ON, the output is set to ON immediately and the timer is shut off.
Function Used to delay the input by a specified delay time after an ON/OFF device transitions from the ON state to the OFF
state.
• Delay time in seconds is specified by the DELAYTIME parameter.
Inputs IN = Boolean value
• No delay is provided when the input goes from the OFF state back to the ON state.
Outputs OUT = Boolean value
When the input transitions from the OFF state to the ON state, the output is set to ON immediately.
Parameters DELAYTIME
IN
ORDERINCM
OUT
Description When the input state changes from OFF to ON, an internal timer starts counting down the delay specified by
DLYTIME. When it times out, the input is monitored again, and if it is still ON, the output is set ON, When the input
state transitions to OFF, the output is set to OFF immediately and the timer is shut off.
Function Used to delay the input by a specified delay time after an ON/OFF device transitions from the OFF state to the ON
state.
• Delay time in seconds is specified by the DELAYTIME parameter.
Inputs IN = Boolean value
• No delay is provided when the input goes from the ON state back to the OFF state.
Outputs OUT = Boolean value
• When the input transitions from the ON state to the OFF state, the output is set to OFF immediately.
Parameters DELAYTIME
IN
ORDERINCM
OUT
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Allen-Bradley ProcessLogix 1757 Series Specifications

General

Brand	Allen-Bradley
Model	ProcessLogix 1757 Series
Category	Control Unit
Language	English