An authorized administrator may use the SMTP configuration screen to:
NOTE: The default TCP port number for SMTP is 25. Ensure that you configure the port specified by your local mail server.
Message Creation and Delivery
A user-defined event or condition triggers the SEND_EMAIL block to create a message. Each message uses one of three user-defined headers. Each message sent from the controller can contain text and variable information (up to a maximum of 1 022 bytes).
The project selects the appropriate header. Each header contains:
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sender name
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list of recipients
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subject
An authorized administrator can define and update the text and variable information via the SMTP configuration screen. You should define mail headers to indicate different levels of importance. For example:
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header 1 could be Urgent problem reported by PLC 10
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header 2 could be Notification from substation 10
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header 3 could be Info message from water system
Listing different recipients in each of the three headers assures that information flows quickly to the right recipients. The project adds pertinent information such as the specific device, process, or location. This information is added to the body of the mail message. Then the complete message is sent to an electronic mail server for distribution to recipients.
Recipients may be engineers, managers, or process owners.
Security (Authentication)
An optional login (system ID) and password can be used to authenticate the connection to the SMTP mail server. The SMTP-supported authentication method is LOGIN.
