| 摘要 |
PURPOSE:To enable easy monitoring of set points and present values of a timer and a counter by holding and displaying one or both of the present value and set point memorized in a memory when the element number of the timer or counter accords with the set point in a setter. CONSTITUTION:A decoder 25 generates an output when the instruction data are timer instruction and/or counter instruction. A comparator 28 generates an output when the input-output address fed to a register 22 accords with a set point in a setter 27. When the inouts to an AND gate G5 are equal to each other, the set points and present values of a timer and a counter are latched on registers 23 and 24, held over one scanning time, and displayed on displayers 31 and 32. |
