PLC data log module with external storage for storing PLC log data and method for storing PLC log data in the same
AssigneeLsis Co., Ltd.
InventorHyun Woo Jang
Life of this patent
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Abstract
Provided is a PLC data log module and method for storing data in the same, wherein, in a case one or more storages among a plurality of outside storages is attached, a log data is stored in the attached outside storage, the log data is stored in the storage and check is made as to whether the log data is normally stored in the attached outside storage.
Claims11
A PLC (Programmable Logic Controller) data log module connected to a PLC basic module and configured to be attached to an external storage for storing PLC log data, the data log module comprising:
- a temporary storage configured to temporarily store the PLC log data received from the basic module;
- an internal storage configured to store the PLC log data in a predetermined file system;
- and
- a controller configured to:
- determine if the external storage is electrically connected to the internal storage;
- whether or not the external storage is electrically connected to the internal storage,
- store the PLC log data in the internal storage, and
- repeatedly determine whether or not there is PLC log data in the internal storage that has not been stored in the external storage,
- when the external storage is electrically connected to the internal storage,
- attempt to store the PLC log data in the external storage;
- determine if the PLC log data was successfully stored in the external storage;
- and
- if it is determined that the PLC log data was not successfully stored in the external storage, re-attempt to store the PLC log data that was stored in the internal storage in the external storage.
A method for storing data in a PLC (Programmable Logic Controller) data log module connected to a PLC basic module, the data log module comprising an internal storage and configured to be electrically connected to an external storage, the method comprising:
- determining if the external storage is electrically connected to the internal storage;
- whether or not the external storage is electrically connected to the internal storage,
- storing PLC log data in the internal storage, and
- repeatedly determining whether or not there is PLC log data in the internal storage that has not been stored in the external storage,
- wherein the external storage is electrically connected to the internal storage,
- attempting to store the PLC log data in the external storage;
- determining if the PLC log data was successfully stored in the external storage;
- and
- if it is determined that the PLC log data was not successfully stored in the external storage, re-attempting to store the PLC log data that was stored in the internal storage in the external storage.
Dependencies are inferred from the claim text.