| 摘要 |
PURPOSE:To debug a user program in an inexpensive constitution, by confirming the turn-on or off state of the switch of each load without driving each load when the debugging mode is set. CONSTITUTION:When a mode setting means is set to the debugging mode, a user program is executed normally, and output data resulting from the execution is transferred to an output circuit. A relay XR is inactivated through a relay driver 15, and its contact XR-1 is turned off, and power supply to loads L1-Ln is impossible, and loads L1-Ln are not driven. However, since relays X1-Xn are operated normally, output state displays DPY1-DPYn are lit as usual. Thus, operation states of relays X1-Xn are confirmed on displays DPY1-DPYn without driving actual loads, and the user program is debugged while simulating the output state. |
