Read And Write Extended File Register; Considerations For Reading And Writing Extended File Register - Mitsubishi Electric MELSEC IQ-R series Reference Manual

17.5

Read and Write Extended File Register

The extended file register is a memory area that stores required data and operation result for various data processing by
using the software package for extended file register 'SWOGHP-UTLPC-FN1' or 'SW0SRX-FNUP' (hereinafter abbreviated to
UTLP-FN1 and FNUP) and AnACPU and AnUSCPU extended file register dedicated instructions. The extended file register
uses free area of user memory area in CPU module as a file register.
The following example shows the control procedure to read and write extended file register.

Considerations for reading and writing extended file register

The following shows the considerations when reading writing extended file register using the commands described in this
section.
Accessible CPU modules
Only CPU modules that can handle the extended file register can be accessed.
This function cannot be used for CPU modules that cannot handle an extended file register (such as A1N).
Error detection for block numbers that do not exist
Depending on the type of memory cassette inserted in the CPU module, an error (character area error '06H') may not be
detected even when a read/write operation is performed by specifying the block numbers that do not exist. In this case, the
read data is incorrect. If writing data to the CPU module, the user memory of the CPU module will be collapsed.
Check the type of memory cassette and parameter settings before using these functions.
Memory cassette model name
A3NMCA-12
A3NMCA-18
A3NMCA-24
A3NMCA-40
A3AMCA-96
*1 A3AMCA-96 can be used for A3A, A3U, and A4UCPU.
For details, refer to the manual of UTLP-FN1 or FNUP, or user's manual of the access target CPU module.
Block numbers of extended file register that can be handled by A2USCPU(S1)
The block numbers of the extended file register that can be handled by A2USCPU(S1) is as follows.
• A2USCPU: No.1 to 3
• A2USCPU-S1: No.1 to 8, No.10 to 16
Extended file register of R/L/Q/QnACPU
The extended file register of R/L/Q/QnACPU cannot be read/written.
Block numbers that do not cause character area error (06H)
A0J2H, A2, A3CPU
No.10 to No.11




A2N, A3NCPU
No.10 to No.28
No.13 to No.20
17 COMMUNICATING USING 1C FRAMES
17.5 Read and Write Extended File Register
A3H, AnA, AnUCPU
No.13 to No.28
No.21 to No.28
*1
No.21 to No.48
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