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27 DEVICES
27.6 Module Access Device
27.6 Module Access Device
This device directly accesses from the CPU module to the buffer memory of the intelligent function module mounted on the
main base unit and extension base unit.
Specify this device with 'Un\Gn'. (Example: U5\G11)
When reading/writing the buffer memory data using the module access device more than twice within a
program, the processing speed can be increased by conducting read/write operations at a single point of the
program using the FROM/TO instruction.
• When data is written using more than one module access device:
• When data is written at a single point of the program using the TO instruction:
(1) Store data to devices such as the data register (D).
(2) Write data to only one point in the program.
Precautions
The following describes the precautions for when the module access device is used.
• If data is written to the refresh-target memory using a program while the refresh function is being used, the CPU module
overwrites the data in the target memory at the execution of the refresh function. Thus, the expected operation may not be
acquired. When the refresh function is used, do not write the data directly to the refresh-target memory but write it to the
refresh-source memory.
*1 When the data is transferred from the CPU module to the module, the target memory is the buffer memory or link device. When the data
is transferred from the module to the CPU module, the target memory is the specified device of the CPU module.
Specified item Value to be specified
Un Start I/O number of intelligent function modules Upper two digits when a start I/O number is described in three digits
(00H to FFH)
Example: 1F stands for X/Y1F0
Gn Buffer memory address 0 to 268435455 (decimal)
MOVP K0
MOVP K10
MOVP K5
MOVP K100
U0\
G10
U0\
G11
U0\
G12
U0\
G13
MOVP K0 D0
MOVP K10 D1
MOVP K5 D2
MOVP K100 D3
T0 H0 K10 D0 K4
(2)
(1)
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