| 摘要 |
PURPOSE:To reduce the probability of causing a faulty state of automation in case of its original operation command, by executing a function check when the automation added as option and its function part are in a holding state. CONSTITUTION:When automation is in a holding state, its operation is checked by providing an operation diagnostic signal generating device HSM-G for obtaining a signal of pseudo start is provided in a CPU, and applying its output signal to an applied terminal of HEM-GO. In that case, since a valid bit detection device VLD is not operated, the signal is not applied to a decoding circuit DEC and a control signal to HSM is not generated, but a counter CNT executes repeatedly a counting operation of +1. Therefore, a parity check device PC is capable of checking the status of the counter CNT, and if operation failure of the counter has occurred halfway, it is detected immediately. In this case, it is reported to the CPU by turning on HSM-ERROR in the CPU. |
