Rockwell-automation 1760-xxxx Pico GFX-70 Controllers User Manual Uživatelský manuál stáhnout pdf (Strana 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.

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