Mitsubishi MELSEC Q Series Programming Manual page 892

FROM(P),DFRO(P)
(2) When 0 is specified in n3 as the number of data to be read, no processing is performed.
(3) The number of data to be read changes depending on the target CPU module.
Basic model QCPU
Universal model QCPU
Operation Error
In any of the following cases, an operation error occurs, the error flag (SM0) turns ON, and an
error code is stored into SD0.
(1) When the specified data is outside the following range.
• The head of the CPU shared memory address (n2) which performs reading is outside the
CPU shared memory range.
• The address of the CPU shared memory (n2) which performs reading plus the number of
read points (n3) is outside the CPU shared memory range.
• The read data storage device number (D) plus the number of read points (n3) is outside
the specified device range.
(2) The CPU module does not exist in the position specified by the CPU module head I/O
number.
(3) When the head of the CPU shared memory address (n2) which performs reading is an
invalid value. (4097 to 9999)
9-14
CPU Module Number of Read Points
Read of data from the CPU shared memory can also be performed using the
intelligent function module devices.
For intelligent function module device, refer to the QnUCPU User's Manual
(Function Explanation, Program Fundamentals) or Qn(H)/QnPH/QnPRHCPU
User's Manual (Function Explanation, Program Fundamentals).
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(Error code: 4101)
(Error code: 2110)
(Error code: 4101)