Mitsubishi Electric FX5 User Manual page 311

Precautions when using timers
Precautions when using timers are as follows.
• Do not specify the same timer coil (OUT T instruction) more than once per scan. If you do, the current value of the timer
is updated when each respective timer coil is executed, so measurement cannot be performed normally.
• If timer is not executed each scan: You cannot skip a timer coil (OUT T instruction) with the CJ instruction, etc., while the
timer's (T1 for example) coil is ON. If a timer's coil is skipped, the timer's current value is not updated, so measurement
cannot be performed normally. If a timer (T1 for example) exists within a subroutine program, be sure to execute the
subroutine coil that includes the T1 coil only once per scan while that timer's coil is ON. If not executed, measurement
cannot be performed normally.
• The timer cannot be used in the initial execution type program, fixed scan execution type program, or event execution type
program. The timer can be used in standby type programs if the coil of timer (OUT T instruction) is executed one time for
one scan using a subroutine program.
• The timer cannot be used in interrupt programs. The timer can be used in subroutine programs or FB programs if the coil of
timer (OUT T instruction) is executed one time for one scan.
• If setting value is "0": The contact is turned ON when the OUT T instruction is executed.
• If setting value is modified after time up: The timer remains in time up status and does not operate even if the setting value
is raised higher than the current value after time up.
Routine timer setting
The setting of the routine timer is made.
Navigation window  [Parameter]  [FX5UCPU]  [CPU Parameter]  "Memory/Device Setting"  "Device/Label
Memory Area Setting"
Window
Displayed items
Item Description
To use or not to use the Whether the routine timer is used is set.
routine timer of timer (T)
Start device No. of The initial device of the routine timer is set.
routine timer of timer (T)
Setting range Default
• Not use Not use
• Use
0 to 1023 0
26 DEVICES
26.2 User Devices
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