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21 DEVICES
21.4 Module Access Device
21.4 Module Access Device
Device that allows you to directly access the buffer memory of intelligent function modules connected to the CPU module from
the CPU module.
Specification method
Specified by U [module number of intelligent function modules]\[buffer memory address].
(Example: U5\G11)
Processing speed
Processing speed of reading/writing by module access device is slightly faster than using FROM/TO instruction. (Example:
MOV U2\G11 D0) When reading the buffer memory of a module access device and executing another process by 1
instruction, the processing speed would be approximately the total of processing speed of FROM/TO instruction and
processing speed of instruction. (Example: +U2\G11 D0 D10)
If reading/writing data of the buffer memory using module access device at least 2 times in the program, you
can speed up processing time by reading/writing at a single place in the program using a FROM/TO
instruction.
• Writing using multiple module access devices
• Writing at single place in program using TO instruction
MOVP K100
U1\
G13
MOVP K5
U1\
G12
MOVP K10
U1\
G11
MOVP K0
U1\
G10
K10H1T0 K4
D3
MOVP K100
D2
D1
D0
D0
MOVP K5
MOVP K10
MOVP K0
Stores data to a device such as data register (D).
Writes data once in the program.