| 摘要 |
<p>PURPOSE:To improve the ability to turn on and off a power source and to control a different circuit by opening or closing two relays for input and output simultaneously when only either of the upper and lower limit values of two set value registers is set. CONSTITUTION:When only the upper limit value is set, the current value in a PV register is checked to turn off an XH and an XL flag, an XH and an XL relay, and LEDs 13 and 14 when the current value does not exceed the upper limit set value and turn on the XH and XL flags and XH and XL relays when the current value exceeds the upper limit set value. Similarly, the XL and XH flags and relays are turned on or off at the same time according to the combination of the upper and lower limit set values and the large/small relation between the current value of the PV register and the upper or lower limit value, thereby turning on or off the LEDs 13 and 14. Thus, the input/output relays are turned on or off at the same time to improve the ability to turn on and off the power source.</p> |
