Toshiba PROSEC T1-16S PLC User's Manual - CTi Automation

7. Instructions
TOF OFF delay timer
Expression
Input ⎯[ A TOF B ]⎯ Output
130 T1-16S User’s Manual
6F3B0253
Function
When the input is changed from OFF to ON, the output and the timer device corresponding to the
timer register B are set to ON. When the input is changed from ON to OFF, timer updating for B is
started. The elapsed time is stored in B. When the specified time by A has elapsed after the input
came OFF, the output and the timer device are turned OFF. (Timer updating is stopped)
The available data range for operand A is 0 to 32767.
Execution condition
Input Operation Output
OFF Elapsed time < preset time (timer is updating) ON
Elapsed time ≥ preset time (timer is not updating) OFF
ON No operation (timer is not updating) ON
Operand
Name Device Register Constant Index
X Y R S T. C. XWYWRWSW T C D I J K
A Preset time √ √ √ √ √ √ √ √ √ √ 0 - 32767
B Elapsed time √
Example
Y021 (and the timer device T.002) is turned OFF 1 second after X000 came OFF.
X000
Preset value
T002
T.002
Y021
Preset time (1 s) Less than preset time
Note
• Time is set in 10 ms units for;
T1: T000 to T031 (0 to 327.67 s)
T1S: T000 to T063 (0 to 327.67 s)
• Time is set in 100 ms units for;
T1: T032 to T063 (0 to 3276.7 s)
T1S: T064 to T255 (0 to 3276.7 s)
• Multiple timer instructions (TON, TOF or
SS) with the same timer register are not
allowed.
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