### Setting of External Device

To communicate MELSEC-A Series (Ethernet Interface Unit) with the display, you need to set the ladder program of the External Device and the DIP switch of the Ethernet Interface Unit. Settings of the sample ladder program and the DIP switch are shown below.

Please refer to the manual of the External Device for more details.

##### Example of Ladder Program

LD | M9038 |
DMOVP | Hxxxxxxxx D100 | : IP address of External Device*1
MOVP | K0 D102 |
MOV | H0100 D116 | : Connecting method (UDP)
MOV | K1024 D124 | : Port No. of External Device (in case of entering "1024" for example)
MOV | K1024 D127 | : Port No. of display (in case of entering "1024" for example)
DMOV | Hxxxxxxxx D125 | : IP address of display*1
DMOV | HFFFFFFFF D128 |
MOV | HFFFF D130 |
LD | M9036 |
TOP | H0000 H0000 D100 K50 |
LD | X19 |
MOV | K5 D113 |
TOP | H0000 K13 D113 K1 |
LD | M9036 |
OUT | Y0019 | : Initial request signal
LD | M9036 |
OUT | Y0008 | : Open request signal
END |  |

*1: xxxxxxxx shows IP address (in Hex). Check with a network administrator about IP address. Do not set the duplicate IP address.

IMPORTANT:

- Do not repeat the address used for communication settings on the External Device (D100 or higher in case of above) for the system area head address on the display for setting.

##### Settings of Interface Unit

Mode Setting Switch

Settings | Setup Description
--- | ---
0 | On-line

Communication Condition Setting Switch

DIP Switch | Settings | Setup Description
SW1 | OFF | Selection of line processing at TCP timeout error
SW2 | OFF | Data Code Setting
SW3 | ON | CPU Communication Timing Settings
SW4 | OFF | Initial Timing Settings

NOTE

- Check with a network administrator about IP address. Do not set the duplicate IP address.

- Always turn OFF (binary code) the data code switch of the External Device.

- When you write from the display during operation of the External Device, set to write enable.