Blocking errors

General

These errors, provoked by the application program, disable its execution but do not cause system errors. On such an error, the application stops immediately and goes to HALT state (the tasks are all stopped in their current instruction).

There are two possibilities for restarting the application:

by the command INIT through the programming software,
by the processor RESET button.

The application is now in an initial state: the data has its initial values, the tasks are stopped at the end of the cycle, the input image is updated and the outputs are commissioned in fallback position, and the RUN command enables application restart.

The indication of a blocking error is signaled by the state LEDs (ERR and RUN) flashing and, according to the nature of the error, by the system bit %S11 being set to 1. The nature of the error is indicated in the system word %SW 125.

Diagnostics table:

State LEDs			System	Bits Errors
RUN	ERR	I/O	System	Bits Errors
F	F	i	%S11=1	Watchdog overrun
F	F	i		Executing the HALT instruction
F	F	i		Executing a non resolved JUMP

Legend:

F: flashing

i: indeterminate