Precautions - Mitsubishi Electric GOT2000 Series Connection Manual

15.3.5 Precautions


When connecting to multiple GOTs
(1) Setting Station
When connecting two or more GOTs in the Ethernet
network, set each [Station] to the GOT.
15.3.3 Ethernet setting
(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

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.

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.

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.
15 - 16
15. CONNECTION TO SIEMENS PLC
15.3 Ethernet Connection