| 摘要 |
PURPOSE:To output only normal data, by providing a circuit which locks the output when a program is abnormal or in a runaway state, to the data output circuit of a device which monitors the program by using a microcomputer. CONSTITUTION:A control command (a) passed through a data reception part 1 is code-converted by a code conversion part 2 and operation data J is stored in an operation data memory part 4 by an operation data write trigger (e). At the same time, a one-shot circuit 8 for an operation output enable trigger lock signal is activated by the operation data write trigger (e) to set an operation data output enable data block time. When a software abnormality detection part 10 detects program abnormality or a runaway, selection data and operation data in a selection data memory part 3 and an operation data memory part 4 are cleared. Consequently, even when an operation data output enable trigger (i) is outputted, no abnormal operation data is outputted. |
