1 FUNCTIONS
1.14 Simple CPU Communication Function (CPU Module (Built-in Ethernet Port Part))
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1
Communication Destination (IP Address)
Set the devices for both transmission source and transmission destination. Up to 64 devices can be registered.
■Module type list
The following table shows the communication devices and specifications applicable to each module.
*1 When using the RnENCPU, connect the cable to the Ethernet port on the CPU part.
*2 The model of the connection destination. When the "target PLC No." is specified, the CPU module that can configure a multiple CPU
system (the RnCPU, RnENCPU, RnPCPU, or RnSFCPU) can be specified as the communication destination.
*3 The model of the connection destination. When the "target PLC No." is specified, the CPU module that can configure a multiple CPU
system (the QnUDE(H)CPU, QnUDVCPU, or QnUDPVCPU) can be specified as the communication destination. For the multiple CPU
system of the MELSEC-Q series, refer to the following.
QCPU User's Manual (Multiple CPU System)
*4 The device can be used when the firmware version of "1.110" or later is used.
■IP address, port number, and own station port number
Set the IP address of the communication destination.
When the communication destination is set to "SLMP Corresponding Device (QnA Compatible 3E Frame)", set the port
number and own station port number.
• When a multiple CPU system is configured, specify the IP address of the CPU module to which the Ethernet
cable is connected.
• In communications where the communication destination other than "SLMP Corresponding Device (QnA
Compatible 3E Frame)" is set, port numbers 61696 to 65534 are dynamically used for the own station port
numbers. Therefore, when using the simple CPU communication function, do not set 61696 to 65534 to the
own station port numbers for establishing a connection instruction (SP.SOCOPEN) of the socket
communication function. If set, the instruction may not be completed properly.
• Port numbers 1 to 1023 are typically reserved port numbers (WELL KNOWN PORT NUMBERS) and 61440
to 65534 are used by other communication functions, so 1024 to 4999 or 5010 to 61439 should be used for
the own station port numbers.
• When specifying the same communication destination in multiple settings, set different own station port
numbers.
Communication Destination Setting
The settings differ depending on the communication destination.
*1 Communication uses the auto-open UDP port, so the setting is not required.
*2 The module has the setting by default to communicate with one device whose protocol is "UDP".
Module type Communication destination Communication specification
MELSEC iQ-R (built-in Ethernet)
*2
RnCPU, RnENCPU
*1
, RnPCPU, RnSFCPU, RnPSFCPU MELSOFT connection (protocol:
UDP)
MELSEC iQ-F (built-in Ethernet)
*4
FX5U CPU module, FX5UC CPU module
MELSEC-Q (built-in Ethernet)
*3
Built-in Ethernet port QCPU
MELSEC-L (built-in Ethernet) Built-in Ethernet port LCPU
SLMP-compatible device (QnA-
compatible 3E frame)
• SLMP-compatible device (No serial number)
• MC protocol 3E frame-compatible device
SLMP (MC protocol QnA-compatible
3E frame)
Read (0401H)
Write (1401H)
Communication destination Necessary setting
MELSEC iQ-R (built-in Ethernet)
*1
MELSEC iQ-F (built-in Ethernet)
MELSEC-Q (built-in Ethernet) Set the following items (for the number of devices) in the "Open Setting" window.
*2
Protocol: "UDP"
Open System: "MELSOFT Connection"
MELSEC-L (built-in Ethernet)
SLMP-compatible device (QnA-compatible 3E
frame)
Configure the settings so that the SLMP (QnA-compatible 3E frame of the MC protocol) can be used on
the SLMP-compatible device side. ( Manual for the device used)
Set the communication data code to binary.
Set the protocol to UDP.
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