IS200VPWRH1A GE 监控PLC运行程序

IS200VSCAH2A
IS200VTURH1B
IS200VVIBH1B
IS200VVIBH1CAA
IS2020ISUCG1A
IS2020LNPSG3A
IS2020LVPSG1A
IS2020LVPSG3A
IS2020RKPSG1A
IS2020RKPSG3A
IS210DTAIH1AA
IS215ACLEH1A
IS215UCVDH1A
IS215UCVDH2AA
IS215UCVDH5AA
IS215UCVEH2A
IS215UCVEM01A
IS215UCVFH2A
IS215UCVGH1A
IS215UCVGM06A
IS215UCVDH1A FOR 2 ISB POR

Description

为监控PLC运行程序是否正常,PLC系统都设置了“看门狗”(Watching dog)监控程序。运行用户程序开始时,先清“看门狗”定时器,并开始计时。当用户程序一个循环运行完了,则查看定时器的计时值。若超时(可设定,一般不超过100ms),则报警。严重超时,还可使PLC停止工作。用户可依报警信号采取相应的应急措施。

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