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21.3 Functions of Master Memory Cassette
21.3.1 Outline of Functions
The master memory cassette includes functions such as memory backup, replication and real-
time clock. Only one of the functions can be installed to the FP-XH M8N Control unit.
Master memory function
Item
Clock/calendar
(real-time clock)
Master memory
function
21.3.2 Setting of Master Memory Unit
Setting of the Function Toggle Switch
Confirm the switch position before installation.
Switch position
OFF (RTC)
ON (RTC + ROM)
Specification
Year (last 2 numbers in the Gregorian calendar), month, day, hour
Setting items
(24-hour) minute, second, week
0 ℃: Month error in 104 seconds or less, 25 ℃: Month error in 51
Accuracy
seconds or less, 55 ℃: Month error in 155 seconds or less
Memory
Flash-ROM (512kB)
capacity
System register, ladder diagram program, position control data and
comment data (200kB)
Storable data
F-ROM data area, security function (password, upload prohibited)
Specifications
Position of factory setting. Only runs the real-time clock function.
The real-time clock function and master memory function are activated.
21.3 Functions of Master Memory Cassette
21-7
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