Retention (non-volatile
data storage)
221
1SVC 440 795 M0100
Retention (non-volatile
data storage)
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.
Permissible markers and function relays
It is possible to retentively store (non-volatile memory) the
actual values (status) of markers, timing relays and up/down
counters.
The following markers and function relays can be set to have
retentive actual values:
• Markers: M9 to M12, M13 to M16, N9 to N16
• Up/down counters: C5 to C7, C8, C13 to C16
• Text function relays: D1 to D8
• Timing relays: T7, T8, T13 to T16
h
Factory setting:
The retention function is not activated.
h
In order to ensure the full compatibility of CL-LSR/CL-LST
and CL-LMR/CL-LMT devices with the AC010 devices, the
settings for the retentive data were divided into the above
areas.
h
Attention!
The retentive data is kept every time the power supply is
switched off. Data security is assured for 1000000 write
cycles.
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