Hitachi SJ Series User Manual page 134

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9.13 Preventing Read and Write of

Unnecessary Data

Disabling Data R/W

・I don't want anyone to read data on the operator

・I don't want anyone to write data on the operator

Data R/W selection

・By setting [UA-18] Data R/W selection to 01,

Read/Write access from VOP is disabled, and read

and write of unnecessary data can be prevented.

・After the parameter is confirmed, if it is set to 01

after data is read for backup, unnecessary read

and write can be prevented.

R/W enabled. Read and write are possible.

R/W disabled. Read and write are prohibited.

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