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02/16 MN05013001Z EN
Diagnostics using the ER contact
The safety function blocks detect sequence faults such as
when the monitored times are not observed. If this type of
error is detected, the QS enable contact opens immediately.
The fault code is sent to the diagnostics output DG> which
can in turn be processed with the DG standard function
block,
a
section “Diagnostics using the DG diagnostics
function block”, page 616. The error contact ER of the safety
function block concerned is closed until the fault is acknowl-
edged by a correct signal sequence at its input coils.
The type of error that causes the error status of the safety
function block, and the coils for resetting it again are stated
in the description of the individual function blocks,
a
chapter “Safety function blocks” on page 341.