Precautions - Mitsubishi Electric GOT2000 Series Connection Manual

15.3.5

Precautions

■1. When connecting to multiple GOTs
(1) Setting Station
When connecting two or more GOTs in the Ethernet network, set each [Station] to the GOT.
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(2) Setting IP address
Do not use the IP address "192.168.0.18" when using multiple GOTs with the GOT 1000 series mixed.
A communication error may occur on the GOT with the IP address.
■2. 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.
■3. 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
■4. When monitoring a nonexistent or turned-off station
If a time-out occurs with the initial communication by monitoring a nonexistent or turned-off station, the time-out can
delay the communication with the normally operating station.
■5. Timing to start GOT communication
After the PLC starts up, start the GOT communication.
When the GOT starts communication before the PLC starts up, a communication timeout occurs.
■6. Operations during communication
During normal communication, any operation which makes the GOT restart (including writing a project and changing
utility data)may display the system alarm, "402 Communication timeout. Confirm communication pathway or modules.",
when the GOT restarts.
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15.3 Ethernet Connection
15.3.3 ■4. Ethernet setting