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MELSEC-F
COMMUNICATION PROCEDURE5
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5.5.2 MELSOFT/MC protocol connections (connection No. 3 and connection No. 4)
*1 Used to connect MELSOFT products through TCP/IP communication.
It performs passive open processing of TCP connection for all MELSOFT products connected to the
network. (It waits for an Active open request given to its own station.)
*2 Regardless of the initial timing setting in the operation settings (refer to Section 4.6), this connection
will always wait for the open status.
*3 The set connection is used only for data communication with MELSOFT products.
*4 Set connections for all connected MELSOFT products when connecting two or more MELSOFT
products at the same time.
Up to 2 connections can be set.
(1) Local station Port No. (connection numbers 3, 4; BFM#54, 61)
Select this item when using connections for MC protocol.
(a) In this item the port number of each connection for the Ethernet module is
set in Decimal.
(b) The setting values are designated in the range from 1025 to 5548 and from
5552 to 65534. Set port numbers that are not already used by other ports.
(c) Set the port numbers for the Ethernet module upon consulting a network
administrator.
(2) Destination IP address (connection numbers 3, 4; BFM#55 to 56,
62 to 63)
Select this item when using connections for MC protocol.
(a) Set the IP addresses (two words) for external devices in the chosen input
format (decimal/hexadecimal).
(b) The IP addresses of external devices must be given values other than
0
H,FFFFFFFFH.
(c) Set the IP addresses of external devices upon consulting a network
administrator.
(3) Destination Port No. (connection numbers 3, 4; BFM#57, 64)
Select this item when using connections for MC protocol.
(a) Set the port numbers of the external devices for each connection.
(b) The port numbers of the external devices are set in the range from 1025 to
65534.
(c) Set the port numbers for the external device upon consulting a network
administrator.
(d) Refer to Paragraph 5.5.1 (9) for cautions on setting the port number.
Setting item name
BFM number
[Decimal]
Description of setting
Setting range/options
MC protocol
MELSOFT
connection
*1
Connection usage 34, 35
Set the connection
usage
Protocol Open system Existence confirmation Setting value Setting value
TCP
Unpassive
Confirm 8403H
A002H
*2 *3 *4
No confirm 8401H
Fullpassive
Confirm C403H
No confirm C401H
UDP —
Confirm 0503H
No confirm 0501H
Local station Port No. 54, 61
Set the local station's
port No
1025 to 5548 or 5552 to 65534
Setting is not
required
Destination IP address 55 to 56, 62 to 63
Set the IP address of an
external device
1
H to FFFFFFFEH
Setting is not
required
Dest. Port No. 57, 64
Set the port No. of an
external device
40
H to FFFFH
Setting is not
required
Number of MELSOFT connections + Number of MC protocol connections 2