Precautions For Using The E-Mail Function - Mitsubishi Electric Melsec Q Series User Manual

2 USING THE E-MAIL FUNCTION

2.3 Precautions for Using the E-mail Function

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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
programmable controller.
(b) In order to avoid programmable controller 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 programmable controller CPU stations with Q series
Ethernet modules connected.
Note that A/QnA series Ethernet modules do not have the e-mail function;
therefore, e-mails cannot be sent to programmable controller CPU stations.
(b) To send files to the Ethernet module as attachments to e-mail, specify the
encoding method (Base 64/7 bits/8 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 device specified by the MRECV instruction without
converting it from ASCII to binary.
(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 6k words
• Data size of main text: Up to 960 words
(c) Mails that are sent and received do not support encrypted data, compressed
data, and data conversion.
(d) When the external device could not be found in an e-mail sending from the
Ethernet module, the error code can be checked through the reception
processing with the MRECV instruction.
If an external device cannot be found when sending e-mail using the
MSEND instruction, 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 the control data of the MRECV instruction.
(For details on error codes, refer to the User's Manual (Basic).)
(e) The e-mail function is supported for the SMTP and POP3 servers.
MELSEC-Q/L
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