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EZD Settings
MN05013005E
378
Retention
It is a requirement of system and machine controllers for
operating states or actual values to have retentive settings.
What this means is that the values will be retained safely even
after the supply voltage to a machine or system has been
switched off and are also retained until the next time the actual
value is overwritten.
The following operands and function blocks can be set to
operate retentively:
• Markers
• Counter function blocks,
• Data function blocks and
• Timing relays.
Operating hours counter
EZD provides four retentive operating hours counters. They
are always retentive and can only be selectively deleted with
a reset command.
Retentive data volume
200 bytes is the maximum memory range for retentive data
(operating hours counters are not included).
Markers
A user-definable and consistent marker range can be
declared as retentive.
Counters
All C.., CH.. and CI.. function blocks can be operated with
retentive actual values.
Data function blocks
A user-definable consistent data function block range can be
operated with retentive actual values.
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EZD comes with the following factory setting:
The contrast is set to 0.
The backlight is set to 75 %.
