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MELSEC
14 TROUBLESHOOTING
14.8 Troubleshooting for Slow PC Operation
This section explains probable causes and troubleshooting when a PC becomes slow.
(1) Possible
causes
for slow PC operation
The MELSECNET/H driver refreshes link device data assigned to another station
from the refresh data storage area on the MELSECNET/H board to the
MELSECNET/H drive buffer, and those assigned to the host station from the
drive buffer to the refresh data storage area at specified intervals.
1
If more than one of the following causes occurs, the processing time for the
above link refresh is increased in the total PC processing and causes slow
operation:
Too many link device points are set for the entire network.
The link scan time value is too small.
The computational power of the PC is low.
1: It indicates the case where Link Refresh is selected in the Link Device
Access Method setting on the MNETH utility’s "Driver" screen.
(2) Troubleshooting
When the PC becomes slow, perform the following:
Increase the link refresh interval value on the MNETH utility’s "Driver"
screen.
Set the constant link scan in Common parameter setting of the control
station.
Decrease the number of link device points in Common parameter setting of
the control station.
Summary of Contents for Q80BD-J71BR11
Page 2: ......
Page 24: ...A 22 A 22 MEMO ...
Page 50: ...4 6 4 6 MELSEC 4 FUNCTION MEMO ...
Page 92: ...6 36 6 36 MELSEC 6 PROCEDURE AND SETTINGS UP TO THE POINT OF OPERATION MEMO ...
Page 132: ...10 2 10 2 MELSEC 10 MELSEC DATA LINK LIBRARY MEMO 10 ...
Page 138: ...11 6 11 6 MELSEC 11 PROGRAMMING MEMO ...
Page 164: ...12 26 12 26 MELSEC 12 APPLICATION FUNCTIONS MEMO ...
Page 166: ...13 2 13 2 MELSEC 13 ERROR CODE MEMO 13 ...
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