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In addition, it is also possible to set the ERROR bit of "free
defined errors" via the user program.
In normal operation the relay should only be switched load-
free, so the function must only be used in an "emergency"
for a general switching-off of the outputs.
In order to reset all outputs in "normal operation" this function
should be accomplished via suitable BIT links, not by using the
relay.
Example
A CAN-BUS-OFF error occurs.
The operating system sets the CAN-BUS-OFF-ERROR bit.
The user program detects this state by polling the
corresponding bits.
If required the ERROR bit can be set:
As a result the operating display LED flashes red and the safety
relay is de-energised switching off all outputs. The level of the
error output becomes low.
The error is removed by restarting CAN via the function call
CAN_RESTART. The CAN-BUS-OFF-ERROR bit is deleted
automatically.
If required the ERROR bit has to be deleted via the user
program. The relay energises again, the LED flashes green.