Omron CS1W-HCA12-V1, Operation Manual

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xvi
Data Backup
6
• When replacing parts, be sure to confirm that the rating of a new part is
correct. Not doing so may result in malfunction or burning.
• Before touching a Unit, be sure to first touch a grounded metallic object in
order to discharge any static build-up. Not doing so may result in malfunc-
tion or damage.
• When transporting or storing circuit boards, cover them in antistatic mate-
rial to protect them from static electricity and maintain the proper storage
temperature.
• Do not touch circuit boards or the components mounted to them with your
bare hands. There are sharp leads and other parts on the boards that
may cause injury if handled improperly.
• Data in the DM Area, error log, EM Area, or Timer/Counter Area may
become corrupted if power is not supplied for an extended period of time.
Program the PLC to check SR 24914 before starting operation. If SR
24914 is ON, the memory areas that are normally held during power inter-
ruptions will not have been held properly (i.e., the data will be corrupted).
(The data in the DM Area can be backed up to flash memory by turning
ON SR 25200.)
6 Data Backup
6-1 Automatic Backup
Data in the Customizable Counter Units is backed up either by a super capac-
itor or flash memory, as listed in the following table.
Note The contents of DM 0000 to DM 6143 are written to flash memory only when
SR 25200 (DM Area Backup Bit) is turned ON.
The data in RAM is backed up by the super capacitor for 10 days at 25
°
C. The
backup time varies with the ambient temperature as shown in the following
graph.
Data Data backup
DM Area (DM 0000 to DM 6143), EM Area (EM 0000 to EM
2047), error log (DM 6144 to DM 6199), and counter present
values.
A setting is provided to either enable or disable holding EM
Area data. The default is to not hold the data.
RAM with super
capacitor
User program, read-only DM Area words (DM 6200 to DM
6599), Unit Setup Area (DM 6600 to DM 6655), expansion
instructions information, read/write DM Area words (DM 0000
to DM 6143, see note.) Flash memory