TMON

Error Flag (F11.0) Notice

The error flag, F11.0, will be ON for one scan when the address of the data register assigned by Z exceeds its range. The valid range of the data register Z is Z128 ~ Z1023 when using Function Block implementation.

Instruction Behavior

The TMON instruction behaves as follows:

• The behavior is similar to the TRTG instruction.
• The data register T assigned to t is a BOOL data register.
  • TS and TC express the detailed value of the data register T assigned to t.
    • TC is a WORD data register used for the current time value of t.
    • TS is a WORD data register used for the time setting value of t.
      • The value of TS is equal to the value of v.
• The value of TC changes as follows:
  • When the instruction is initially energized, the value of TC is equal to v.
  • When the instruction is deenergized, the value of TC continues to decrease to 0.
    • The timer contact t is ON while TC decreases.
  • When TC decreases to 0, the timer contact t turns OFF.
  • If the instruction reenergizes while counting down, the reenergization is ignored as TC is decreasing.
• The actual time for the timer data register t is calculated as follows:
  • Actual Time = v × time unit (100ms or 10ms)
• The timer contact assigned to t can be used as an A or B contact.
• When the timer contact meets the RST instruction, the current value is 0 and the timer turns OFF.