JUMO LOGOLINE 500d Operating Manual page 42

Relay texts
Relay texts are printed when a relay switches.

The request for printing a relay text
is ignored if the text consists only of
blank characters. There is also no
printing of the corresponding time.

Section 8.6.1
Generally for external, binary-linked and
relay texts:
In addition to the programmed text, the time
is printed at which the text printing has been
requested.

The time reference mark "_"
( Section 7.3) is not being printed
since printing may be delayed.
7 Text printing
42