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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/receiving e-mails to/from a running system and controlling the
PLC.
(b) In order to avoid PLC system malfunctions caused by receptions of illegal e-
mails from the outside sources, take precautions in preventing illegal e-mails
from being received on the mail served on the Ethernet module side (using
an anti-virus program, etc).
(2) Precautions regarding the external device
(a) E-mails can be sent to PLC stations in which Q series or FX
3U 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 Ethernet module stores the data of attached files received from the
external device in the buffer memory (BFM#14873 and later) as they are
without converting them to binary data.
(b) The maximum sizes of data that can be sent/received 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)
(c) Mail that is sent and received do not support encrypted data, compressed
data, and data conversion.
(d) 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.)
(e) The e-mail function is supported for SMTP and POP3 servers.