Allen-Bradley 700-HX - Twin Timer Operation

Publication 700-UM002A-EN-D - July 2001
3-14 Functions
Twin Timer Operation
Z mode: ON/OFF-duty Adjustable Repeat Cycle
Power
Start signal
Gate
Reset
Control output
ON duty setting
(%) ON time
0
0
DOWN
UP
ON duty setting
(%) ON time
Cycle time
Cycle time
Timing
diagram
Timing starts when the start signal goes ON.
The status of the control output is reversed
when time is up (ON at start).
While the start signal is ON, the timer starts when
power comes ON or when the reset input goes OFF.
Basic Operation
Power
**
Start signal
input
Output
* Normal output operation will not be possible if the
set time is too short.
Set the value to at least 100 ms (contact output
type).
** Start signal input is enabled during timing.
Timing
ON duty (%)
Timing
(cycle time)
Timing
(cycle time)
Timing
ON duty (%)
Output mode TOFF: Twin Timer OFF start
Output mode TON: Twin Timer ON start
Power
Start signal
Gate
Reset
Control output
OFF time
Timing
diagram
UP
ON time
Sustained
Output
DOWN
0
OFF time
ON time
0
Timing starts when the start signal goes ON.
The status of the control output is reversed when time
is up (OFF at start).
While the start signal is ON, the timer starts when the
power comes ON or when the reset input goes OFF.
* Normal output operation will not be possible if the
ON/OFF set time is too short.
Set the value to at least 100 ms (contact output
type).
** Start signal input is disabled during timing.
Basic Operation
Power
**
Start signal
input
Timing
ON
Output
Timing
OFF
Timing
ON
Timing
OFF
Power
Start signal
Gate
Reset
Control output
OFF time
Timing
diagram
UP
ON time
Sustained
Output
DOWN
OFF time
ON time
0
0
Timing starts when the start signal goes ON.
The status of the control output is reversed when time
is up (ON at start).
While the start signal is ON, the timer starts when the
power comes ON or when the reset input goes OFF.
* Normal output operation will not be possible if the
ON/OFF set time is too short.
Set the value to at least 100 ms (contact output
type).
** Start signal input is disabled during timing.
Basic Operation
Power
**
Start signal
input
Timing
OFF
Output
Timing
ON
Timing
OFF
Timing
ON