Pixsys PL260, User Manual

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1.7.13 Memory area MMC
MMC area is the optional external memory which can be used to save big
amounts of data which must be stored even by lack of power supply.
Memory is Eeprom, therefore access to this area is slower than access to
area V and SM. PL260 does not check integrity of data saved in this area.
This area is divided in words (0
÷
12999) and can also be entered by
Modbus protocol.
N.B.: MMC memory allows a max. number of writings for each
location (warranted 1000000), after that data integrity is no longer
assured; so it is necessary to avoid continuously writing into this
memory area.
1.7.14 Memory areas COMx_SEND and EXP1_SEND
Memory area COMx_SEND and EXP1_SEND are used to load data which
will be sent to the relevant serial port. They are used only in mode free-
port. In standard mode these areas are handled with the selected
communication protocol.
These areas are divided in byte (8 bit).
1.7.15 Memory areas COMx_RECEIVE and EXP1_RECEIVE
Memory areas COMx_RECEIVE and EXP1_RECEIVE are used to save
data received by the relevant serial port. They are used only in mode free-
port. In standard mode these areas are handled with the selected
communication protocol.
These areas are divided in byte (8 bit).