Technical Manual – IP Router SCN-IP100.03
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5.2.5 Specific behavior and error handling
In the e-mail functionality the following points should be noted:
From technical reasons, between two e-mails is a 5 second break provided for an error-free
processing.
E-mails are sent only with current time. Therefore, it is checked whether ever a time via NTP
was received. If not, the emails are sent out after 5 minutes with the start date 01/01/1970
00:00.
Time via NTP server is monitored hourly. If no time is received, this is output via object 53
"NTP time server - error" with a "1". As soon as a time is received again, a "0" is sent.
The following table shows the corresponding communication object:
Number
Name
Length
Usage
53
NTP Time Server – Error
1 Bit
Sending an error
Table 22: Communication object – NTP Time Server Error
Error code-object:
The error code object is set and sent when …
The email was 4 times tried to transmit and this failed every time and the previous email
delivery was without error or it was the first email after a restart. Between the attempts,
the subsequent delays will be respected:
o
Delay before first repeat: 10 seconds
o
Delay before second repeat: 1 minute
o
Delay before third repeat: 10 minutes
The email was tried 1 time to be sent and it failed, and the previous e-mail delivery was
also flawed.
The following table shows the corresponding communication object:
Number
Name
Length
Usage
52
E-Mail – Error code
1 Byte
Sending an error
Table 23: Communication object – E-mail Error code
E-Mail buffer:
It can be buffered 10 emails.
From the 8th Mail in the buffer, an alarm will be sent to the bus.
When the buffer is full, additional email requests are rejected
All values that are displayed in the bit alarm emails respectively status emails can only
send the currently valid value at the time of shipment.
Example:
o
T=0: Status element 3 = OFF
o
T=10: Status element 3 = ON
o
If at the time t=0 the mail delivery is triggered (for example, via object), the e-
mail but only at the time t=10s is emitted, the value "On" in the email will be
inserted.
The following table shows the corresponding communication object:
Number
Name
Length Usage
51
E-Mail buffer – Overflow
1 Bit
Indicates an overflow of the e-mail buffer
Table 24: Communication object – E-mail buffer
Error code and email buffer are reset if a transmission was successful or the error condition is no
longer fulfilled
.
