Rockwell Automation PicoTM Controller 1760 Instrukcja Użytkownika Strona 107

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1 Publication 1760-UM001A-EN-P
Chapter
7
Retention
What is Retention?
Some system and machine controllers for operating states or actual values require
retentive settings. What this means is that values are retained even after power to a
machine or system has been turned off and are retained until the actual value is
overwritten.
Pico Models with Data Retention
Retentive values can be set with 1760-L12BWB-xx (via the SYSTEM menu) as
well as 1760-L18AWA for the following markers and function relays.
Retentive 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:
The Retention setting applies to all of the relays listed above. Individual markers or
function relays cannot be set retentively.
1760-L12BWB-xx
Marker Relays M13, M14, M15, M16
Timing Relay T8
Up/Down Counter C8
1760-L18AWA
Markers M13, M14, M15, M16
Text Function Relays D1 through D8
Timing Relays T7, T8
Up/Down Counters C5, C6, C7, C8
NOTE
The retentive data is written to an EEPROM every time the
power is turned off. Data security is thereby assured for 100,000
power cycles.
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