Input only the specified range of voltage or current to a Unit. A current orvoltage exceeding the specified range may cause malfunction or fire.1. Emergency stop circuits, interlock circuits, limit circuits, and similar safety measuresmust be provided in external control circuits.2. The PC will turn OFF all outputs when its self-diagnosis function detects any error orwhen a severe failure alarm (FALS) instruction is executed. As a countermeasure forsuch errors, external safety measures must be provided to ensure safety in thesystem.Be sure that all the terminal screws and cable connector screws are tightenedto the torque specified in the relevant manuals. (Communications connectorscrews: 0.25 to 0.3 Nm; Terminal screws: 0.3 to 0.5 Nm.) Incorrecttightening torque may result in malfunction.Confirm safety at the destination node before transferring a program toanother node or changing the I/O memory area. Doing either of these withoutconfirming safety may result in injury.Execute online edit only after confirming that no adverse effects will becaused by extending the cycle time. Otherwise, the input signals may not bereadable.Be sure that terminal blocks, communications cables, and other items withlocking devices are properly locked into place. Improper locking may result inmalfunction.