Mitsubishi Electric MELSEC iQ-R Series - Page 1055

7 APPLICATION INSTRUCTIONS
7.27 Module Access Instructions
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7
• An instruction which has been executed will result in non-processing if it fails to access the target module because the
module is faulty or busy in processing.
Operation error
• If refresh settings are not made for the refresh area of the read/write enabled area in the CPU buffer
memory, the area can be used as a read/write specifiable area. Even when refresh settings are made, the
area can be used as a read/write specifiable area in the reference send range and later.
• A CPU buffer memory access device can be used to write data to the CPU buffer memory. ( MELSEC
iQ-R CPU Module User's Manual (Application))
• The TO(P) and DTO(P) instructions can write data to the buffer memory address with a capacity of 64K or
less. To write data to the buffer memory address with a capacity exceeding 64K, use the TOD(P) or
DTOD(P) instruction. ( Page 1058 TOD(P), DTOD(P))
Error code
(SD0)
Description
2820H The module with the I/O number specified by (U) does not have buffer memory.
2823H The module with the I/O number specified by (H) does not have buffer memory.
The address specified by (s1) is outside the range of buffer memory or CPU buffer memory.
The (n) points of data starting from the address specified by (s1) are not within the range of buffer memory or CPU buffer memory. (TO(P)
instruction)
The (n)2 points of data starting from the address specified by (s1) are not within the range of buffer memory or CPU buffer memory.
(DTO(P) instruction)
0
2048
524287
Refresh area
System area
Read/write enabled