Saving Data; Flash Memory - Omron CS1W-MCH71 Operation Manual

Saving Data

Timing Chart in Executing
IORD Instruction (Address
Specification)
Transferred data
IORD instruction
1,2,3...
5-4 Saving Data
Note
5-4-1

Flash Memory

234
The following describes the timing and processing when executing IORD
instruction.
Format check 1.
Data check 2.
1. At first, on the CPU Unit, check if IORD instruction's operands specifica-
tions are correct. (Format check) If they are not correct, the ER Flag turns
ON to interrupt the IORD instruction.
2. And then, on the MC Unit, check the data specified with the operands is
applicable for processing in the MC Unit. (Data check)
If the data is not applicable for processing, the = Flag will not turn ON and
the instruction will be interrupted.
3. Finally, transfer the specified data from the MC Unit to the CPU Unit.
When transfer is completed, the = Flag will be turned ON.
Data transferred to the MC Unit will be erased either when the power is turned
OFF or when the MC Unit is restarted from the CPU Unit. To preserve the
data that has been transferred, it must be saved to the Flash Memory in the
MC Unit. Once it is saved in the Flash Memory, it can be read and used from
the next time the power is turned ON or the Unit is restarted. When the data is
saved, all the data including parameters existing at that point are saved.
(1) Do not turn OFF the power or restart the CPU while data is being saved.
It may cause a failure of the Flash Memory in the MC Unit, or cause the
MC Unit to operate abnormally.
(2) Flash memory has a limited service life. Data can be written up to
100,000 times.
(3) Do not save any data during program operations or when motors are op-
erating. Unexpected operation may result.
(4) It may take a maximum of 30 seconds to save the data into the Flash
Memory.
The data listed below can be saved in the Flash Memory.
• Programs
• Cam data
• System parameters
• Servo parameters
• Position data
Data Processing 3.
Multiple scans
Section 5-4
Determined