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Precautions - Mitsubishi Electric GOT1000 Series Connection Manual

Microcomputers, modbus products, peripherals.
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5.7 Precautions

When connecting to multiple GOTs
(1) Setting PLC No.
When connecting two or more GOTs in the MODBUS
TCP network, set each [PLC No.] to the GOT.
5.3.1 Setting communication interface
(Communication settings)
(2) Setting IP address
Do not use the IP address "192.168.0.18" when using
multiple GOTs.
A communication error may occur on the GOT with the
IP address.
When setting IP address
Do not use "0" and "255" at the end of an IP address.
(Numbers of *.*.*.0 and *.*.*.255 are used by the
system)
The GOT may not monitor the controller correctly with
the above numbers.
Consult with the administrator of the network before
setting an IP address to the GOT and controller.
When connecting to the multiple network
equipment (including GOT) in a segment
By increasing the network load, the transmission speed
between the GOT and PLC may be reduced.
The following actions may improve the communication
performance.
• Using a switching hub
• More high speed by 100BASE-TX (100Mbps)
• Reduction of the monitoring points on GOT
MODBUS communication control function on
the GS device
At GOT startup, set MODBUS communication control
®
/
function with project scripts, etc.
If settings are changed after communication start, a
communication error may occur.
Setting example for project script
5. MODBUS(R)/TCP CONNECTION
5 - 15
5.7 Precautions
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