IDEC MicroSmart - Manual (Page 273)

15: W EEK P ROGRAMMER I NSTRUCTIONS
« FC4A M ICRO S MART U SER ’ S M ANUAL » 15-7
Adjusting Clock Cartridge Accuracy
The optional clock cartridge (FC4A-PT1) has an initial monthly error of ±2 minutes at 25°C. The accuracy of the clock
cartridge can be improved to ±30 seconds using Enable Clock Cartridge Adjustment in the Function Area Settings.
Before starting the clock cartridge adjustment, confirm the adjustment value indicated on the clock cartridge. This value is
an adjustment parameter measured on each clock cartridge at factory before shipment.
Programming WindLDR
1. From the WindLDR menu bar, select Configure > Function Area Settings. The Function Area Setting dialog box
appears.
2. Select the Others tab.
3. Click the check box to enable the clock cartridge adjustment, and type the adjustment value found on the clock car-
tridge in the Adjustment Value field.
4. Click the OK button.
5. Download the user program to the CPU module, and turn off and on the power to the CPU module.
Clock Cartridge Backup Duration
The clock cartridge data is backed up by a lithium battery in the clock cartridge and held for approximately 30 days at
25°C. If the CPU module is not powered up for a period longer than the backup duration, the clock data is initialized to the
following values.
Calendar: 00/01/01
Time: 0:00:00 AM
Adjustment Value
The adjustment value indicated on the clock car tridge was measured at
25°C to achieve the best accuracy. When using the clock car tridge at other
temperatures, the clock car tridge accuracy may be impaired.