Rockwell Automation 1760-xxxx Pico GFX-70 Controllers User Manual - Manual (Page 350)

Publication 1760-UM002B-EN-P - March 2005
7-22 Pico GFX-70 Settings
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
The device 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.
Timing relays
A user-definable and consistent range for timing relays can be run with
retentive actual values.