Calculating the Size of Data to Save

You can check the size of each piece of data that is stored in backup memory (SRAM) or external storage from the system settings editing screen.

For calculating the size of each data, see the following.

Note: The save destination for variable values (retentive variables) is limited to backup memory (SRAM).

Alarm

(Unit: Bytes)

42000 + [(Maximum Records*1) x 24.5] + [(Number of active alarms in all alarm groups) x 45]

*1 Set at [Max Records] in the Alarm property

(Unit: Bytes)

1626 + (Sum of data sizes of each data logging group)

A: Sum of sizes of each variable in a data logging group

B: (Maximum Records*1) x (A + 14)

C: 1446 + [(Number of variables) x 342] + B

*1 Set at [Max Records] in the Data Logging property

(Unit: Bytes)

8192 + [(SRAM Records*1) x 343]

*1 Set in the Operation Log property

(Unit: Bytes)

8192 + (Total data size of variables with [Retentive] enabled)