Buffer Memory - Mitsubishi Electric MELSEC iQ-R Series User Manual

Buffer memory

The buffer memory to be used for the modem function is shown below.
For the buffer memory that are not related to the modem function, refer to the following section.
Page 498 Buffer memory list
Read/write the setting values from/to the buffer memory using Engineering tool.
This section provides supplementary explanations on setting values used to perform settings and monitoring
with an Engineering tool.
Precautions
Do not write data in the system area of the buffer memory.
If data is written in the system area, the programmable controller system may operate abnormally.
The system area exists in the user area partially. Therefore, take caution when reading from/writing to the buffer memory.
Details of the buffer memory (for modern function)
■Modem connection CH specification (Un\G46)
Designate the interface on the C24 side to which a modem/TA is connected.
■Connection retry count designation (Un\G48)
• Designate the number of retries for the connection request when the connection could not be made to the target device by
the connection request.
• Using the default value for the connection re-try count is recommended.
■Connection retry interval designation (Un\G49)
• Designate the interval time of the retry processing for the connection request when the connection could not be made to the
target device by the connection request.
• The default value is recommended to use for the connection retry interval.
■Initialization/connection timeout designation (Un\G50)
• Designate the following wait time:
Wait time until the modem/TA initialization is complete
Wait time per wait when the connection could not be made to the destination by the connection request
• The default value is recommended to use for the initialization/connection retry timeout.
■Number of initialization retries designation (Un\G51)
Designate the number of retries when the initialization by the initialization request to the modem on the C24 side has failed.
■Data No. for initialization designation (Un\G52)
• Designate the registration number of data for initialization which is transmitted by the initialization request to the modem on
the C24 side.
The registration number is the number registered in C24.
• For details on the designation by program, refer to the following section.
(Page 185 Initialization of modem/TA (terminal adapter))
7 COMMUNICATIONS BY THE MODEM FUNCTION
7.3 Specifications of Modem Function
7
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