IDEC MICROSmart FC5A Series, User Manual

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9: W
EEK
P
ROGRAMMER
I
NSTRUCTIONS
9 ‐ 8 FC5A M
ICRO
S
MART
U
SER
’
S
M
ANUAL
FC9Y ‐ B1273
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 car ‐
tridge 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 Configuration > Cartridges and Modules .
The Function Area Settings dialog box for Cartridges and Modules appears.
2. Click the check box to enable the clock cartridge adjustment, and type the adjustment value found on the clock cartridge in
the Adjustment Value field.
3. Click the OK button.
4. 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 cartridge was measured at 25°C to
achieve the best accuracy. When using the clock cartridge at other temperatures,
the clock cartridge accuracy may be impaired.