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10 - 4
MELSEC-F
USING THE E-MAIL FUNCTION10
10 - 4
10.3 Precautions for Using the E-mail Function
The following explains precautions when using the e-mail function of the Ethernet
module.
(1) Precautions regarding the system
(a) Design the system so that the entire system operates normally at all times
when sending e-mails to/from a running system and controlling the PLC.
(2) Precautions regarding the external device
(a) E-mails can be sent to PLC stations in which Q series Ethernet modules are
installed.
(b) To send files to the Ethernet module as attachments to e-mail, specify the
encoding method (Base 64/7 bits/Quoted Printable) of the attached files.
(3) Common precautions
(a) The maximum sizes of data that can be sent by the Ethernet module are as
follows:
• Data size of attached files: Up to 2048 words
• Data size of main text: Up to 256 words (Sending only)
(b) Mail that is sent do not support encrypted data, compressed data, and data
conversion.
(c) If the external device cannot be found when sending an e-mail from the
Ethernet module, the user can check the error code in the buffer memory.
* If an external device cannot be found when sending e-mail using the
operation of buffer memory, failure of e-mail transmission may not be
recognized, depending on the operation of the mail server. Be sure to
verify the receiver's e-mail address in advance.
* Error codes are stored within BFM#10335. (For details on error codes,
refer to section 11.4.)
(d) The e-mail function is supported for SMTP.
(e) When e-mail communication errors occur, check the error codes stored in
the mail send error log area of the buffer memory.
(f) When the receive data of an e-mail sent is abnormal (garbled characters,
etc.), review the transmission data format (binary/ASCII/CSV) designated
with BFM#10338.
* The Subject should be in ASCII code data format. (It is not converted to
ASCII format.)
(g) Confirm with a system administrator regarding the minimum time intervals
for accessing the mail server when sending e-mail, reading received e-mail,
and inquiring whether or not there is any received e-mail.
Depending on the mail server's security setting, frequent access may be
prohibited.