Part of the settings and the selections of the
operation characteristic of the relay modules in
various applications are made with the selector
switchgroups SG_ . The switchgroups are software
based and thus not physically to be found
in the hardware of the relay module. The indicator
of the switchgroup is lit when the checksum
of the switchgroup is shown on the display.
Starting from the displayed checksum and by
entering the setting mode, the switches can be
set one by one as if they were real physical
switches. At the end of the setting procedure, a
checksum for the whole switchgroup is shown.
The checksum can be used for verifying that the
switches have been properly set. Fig. 2 shows an
example of a manual checksum calculation