“WDOG Status” area

The signals are OFF/grey (functionality not active), otherwise red or green (functionality active)

• HW: the hardware Watch DOG is enabled. In this case, when one of the supported errors is detected, the system will be restarted automatically and this page will not be visible. A different kind of page will be displayed instead, at next restart, with error description that caused the reset. The hardware watch dog is available through the option Hardware – options – System watch dog mode selection – Outputs OFF + PLC reset, or at runtime program by the pre-defined variable GPV_WDOG_MODE = 2.
• SW: the software Watch DOG is enabled. In this case, when an error is detected, the system will not be restarted but the physical outputs (analog and digital) will be disabled. This diagnostic page will appear. It’s advised to use the software Watch DOG during development phase and hardware Watch DOG at production time. The software Watch DOG is available through the option Hardware – options – System watch dog mode selection – Outputs OFF, or at runtime program by the pre-defined variable GPV_WDOG_MODE = 1.
• Outputs OFF: after a Watch DOG error digital and analog outputs have been disabled.
• Force OUT: following a Diagnostic page use, a new page (not related to diagnostic) has been recalled, leaving PLC outputs in “forcing” state, with a value set inside diagnostic pages. In this condition it’s necessary to recall again the diagnostic pages then disable the forcing feature.