Precautions - Mitsubishi Electric GOT2000 Series Connection Manual

19.7 Precautions

■1. Connecting GOT2000 in multi-drop connection
(1) Installing standard monitor OS and communication driver to the serial multi-drop connection unit
When connecting GOT2000 in multi-drop connection, the standard monitor OS and communication driver must be
installed to the GOT from GT Designer3 (GOT1000) (Version 1.12N or later). The standard monitor OS or
communication driver cannot be installed from GT Designer3 (GOT2000).
(2) Device specification
Network No. and station No. are not supported.
■2. Station number setting on GOT
Set each station number so that no station number overlaps.When the station No. is duplicated, the GOT whose station
No. is duplicated cannot be monitored normally.
The station number can be set without regard to the cable connection order.There is no problem even if station
numbers are not consecutive.
■3. Extended function of GOT
The extended functions of GOT shown below are not available.
System monitor, Device monitor, Ladder monitor, A list editor, FX list editor, Intelligent unit monitor, Network monitor, Q
motion monitor, Servo amplifier monitor, CNC monitor, Backup/restore, CNC data I/O, SFC monitor, Ladder editor, Log
viewer, MELSEC-L troubleshoot, Motion SFC, motion program (SV43) editor, Motion program (SV43) I/O
■4. System alarm
The alarms of the serial multi-drop connection unit are displayed on the system alarm.The alarms of the connected
PLC are not displayed.
■5. Activating the serial multi-drop connection unit
The master module detects a slave GOT, which is connected, at the startup.It may take time to detect again the slave
station which is not detected at this point.Activate the master module in the condition that a communication can be
made after the startup of the slave GOT.
■6. Using the multi-drop connection in the multi-channel configuration
If a communication timeout error occurs when using the multi-drop connection in the multi-channel configuration, set
the send delay time to the serial multi-drop connection unit side.
➠ ■4.
■7. Device update cycle
• When the number of connected slave GOTs and the device points of each GOT increase, the device update cycle on
the screen may get slower. In such a case, it is recommended to reduce the device points of each GOT. (Please
consider 250 points as a guide of 1 GOT, and 750 points as a guide of the total points.) In addition, when a timeout
error occurs, make the timeout time longer in the communication settings of the slave GOT.
• When the device number is set randomly, the device update cycle becomes slower compared to the case that the
device number is set consecutively.Therefore, it is recommended to set the device number consecutively.
• Depending on the device points or combination, it may take time to switch the screen.At this time, the device update
cycle of other slave station is also affected.
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19.7 Precautions
The example of a Station No. setting
Communication detail settings
Station Station Station
No.3 No.0 No.15