Omron SYSMAC C200H-IDS01-V1, Operation Manual

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37
The User Program
Section 2-3
The date of production is registered in the following format:
Note Only the last 2 digits of the year are registered.
The following figures show examples of registered dates:
2-3-6 Detection of Data Carrier’s Life
The detecting method of the Data Carrier’s life varies with the kind of memory
(SRAM or EEPROM) incorporated by the Data Carrier. In the case of the Data
Carrier with SRAM, the life of the built-in battery will be checked. In the case
of the Data Carrier with EEPROM, the number of overwriting operations (pos-
sible up to 100,000 times or a desired number of operations) will be checked.
Data Carrier with SRAM (Built-in Battery)
Battery Voltage Check
1,2,3... 1. The voltage of the Data Carrier’s built-in battery can be checked only if the
user reads the two-byte data in addresses 0000 to 0001. The Data Carrier
is not designed so that the voltage is automatically checked, because at
the time of battery check, a certain amount of current flows through the in-
ternal circuitry of the Data Carrier, which in turn consumes the electricity
of the battery. We recommend the user to make a program so that the volt-
age of the battery can be checked once a day.
Battery Low Check Execution Command
a) Read command
b) Auto read command
2. When the voltage of the battery is low, the DC Warning Flag (word n+4 bit
7) will be turned ON.
Address 0000
Address 0001
Bit 7 6 5 4 3 2 1 0
Higher digit of month
Higher digit of year
Lower digit of month
Lower digit of year
Address 0000
Address 0001
Bit
7 6 5 4 3 2 1 0
March 1988
0
8
3
8
Address 0000
Address 0001
Bit
7 6 5 4 3 2 1 0
1
9
December 1990
2
0