Mitsubishi QD75P1N - Page 285

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MELSEC-Q
7 MEMORY CONFIGURATION AND DATA PROCESS
(1) Transmitting data when power is turned ON or CPU module is reset
( )
When the power is turned ON or the CPU module is reset, the "parameters",
"positioning data" and "block start data" stored (backed up) in the flash ROM is
transmitted to the buffer memory.
(2) Transmitting data with TO instruction from CPU module ( )
The parameters or data is written from the CPU module to the buffer memory
using the TO instruction. At this time, when the "parameter area (b)
1",
"positioning data (No. 1 to 600)", "block start data (No. 7000 to 7004)", "control
data" and "PLC CPU memo area" are written into the buffer memory with the TO
instruction, it is simultaneously valid.
1 Parameter area (b) ...... Parameters validated with the next each positioning
control is started.
(
Pr.8
to
Pr.10
,
Pr.25
to
Pr.42
)
(3) Validate parameters when PLC READY signal [Y0] changes from
OFF to ON
When the PLC READY signal [Y0] changes from OFF to ON, the data stored in
the buffer memory's "parameter area (a)
2" is validated.
For
Pr.5
, however, only the data obtained first after the PLC READY signal [Y0]
changes from OFF to ON when the power is turned ON or CPU module is reset
becomes validate.
(Refer to Section 5.2 "List of parameters" for details.)
2: Parameter area (a) ..... Parameters validated when PLC READY signal [Y0]
changes from OFF to ON.
(
Pr.1
to
Pr.7
,
Pr.11
to
Pr.24
,
Pr.43
to
Pr.57
,
Pr.150
)
POINT
The setting values of the parameters that correspond to parameter area (b) are
valid when written into the buffer memory with the TO instruction.
However, the setting values of the parameters that correspond to parameter area
(a) are not validated until the PLC READY signal [Y0] changes from OFF to ON.
(4) Accessing with FROM instruction from CPU module ( )
The data is read from the buffer memory to the CPU module using the FROM
instruction.