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Table of Protocols Section 1-3
Note Any one of the following conditions can be specified to send e-mail automati-
cally:
A periodic timer times out, the Mail Send Switch is turned from OFF to ON, a
specified word contains a particular value, a specified bit turns from OFF to
ON, the CPU Unit's operating mode changes, a fatal error occurs, or an event
is stored in the error log.
1-3 Table of Protocols
Automatic execu-
tion when a preset
condition is met,
sent to computer
(See note.)
Reading data in the
CPU Unit's I/O mem-
ory
Mail Send Func-
tion
Specify a data file as an attached
file and specify the starting read
address and number of words.
The maximum data
size is 6,000
words.
Reading data from a
Memory Card installed
in the CPU Unit
Specify any file as an attached file. The maximum data
size is 1 MB.
Receiving a user-
defined message as
an e-mail
Store the desired message in
ASCII in the CPU Unit's I/O mem-
ory.
The maximum
message length is
1,024 characters
(alphanumeric
characters only).
User-specified tim-
ing, sent from com-
puter
Performing operations
on EM file memory or
a Memory Card
installed in the CPU
Unit
FTP Server Func-
tion
Login to the Ethernet Unit from the
FTP client software and send the
FTP command.
The data size is not
restricted. The IP
address for the
Ethernet Unit must
be private and
fixed.
Reading and writing
data in the CPU Unit's
I/O memory from a
general application
(not using FINS com-
munications)
Socket Service
Function
Socket service operations can be
executed by executing the CMND
instruction or setting control bits in
the PLC.
The IP address for
the Ethernet Unit
must be private
and fixed.
Performed at a set
time every day or
from the ladder
program
Automatically correct-
ing the PLC's internal
clock
Automatic Clock
Adjust Function
Install the SNTP server in the net-
work and schedule the synchroni-
zation time in the Ethernet Unit.
---
Temporarily con-
necting a computer
to perform opera-
tions from a FINS
application such as
the CX-Program-
mer
Performing online
operations on the CPU
Unit
FINS communica-
tions
One function stores the counter-
part FINS nodes' connection infor-
mation. Another function
automatically assigns node
addresses.
The IP address for
the Ethernet Unit
must be private
and fixed.
Performing opera-
tions from two or
more FINS appli-
cations in the com-
puter
A function supports simultaneous
online connections of multiple
applications in the computer.
---
Communications
service
Protocol used Situation when used CX-
Programmer's
Unit setting tag
name
Reference
Mail Send Function SMTP Required SMTP SECTION 2 Mail
Send Function
POP When using “POP before SMTP” POP
DNS When specifying the SMTP server and
POP server by host names
DNS
Timing and
direction
User purpose Communications
service
Method Restrictions