Mitsubishi Electric MELSEC iQ-R Series User Manual page 110

Checking the transmission speed setting
Check that the transmission speed setting of the slave station is the same as that of the master station.
The station number of the slave station having a different transmission speed setting can be also checked; therefore action to
remove a transmission error can be easily taken.
■Procedure
1.
Open the "CC-Link Diagnostics" window.
[Diagnostics]  [CC-Link Diagnostics]
2.
Double-click "Operation Test" in "Related Functions".
3.
Select "Check Transfer Speed Setting" under "Test Type".
4.
Click the [Execute] button to start checking of the transmission speed setting. After checking of the transmission speed is
completed, the transmission speed of each station is displayed on the right side of the window.
• Do not write to the buffer memory areas (buffer memory addresses: 5E0H, 5E4H, 5F8H, 641H, 645H, 783H to 787H).
• Do not check the transmission speed setting using a program or other peripherals at the same time. If executed at the
same time, checking of transmission speed setting may fail.
• In addition, do not check the transmission speed setting using the "Create Check Sheet" wizard at the same time.
Status logging
Data link status of all stations is logged. When multiple stations repeatedly fail and recover or stations after a specific station
do so, the location of the error cause, such as poor cable connection and noise, can be easily identified.
With "RAM + Flash ROM" selected, the first 45 logs after logging start are stored on the flash ROM. Logs stored on the flash
ROM can be checked even after the system is powered off and on or the programmable controller CPU module is reset.
In a redundant system, the status logging cannot be used when a system has been specified by "Specify
Redundant CPU" of "Target System" in the "Specify Connection Destination Connection" window. Directly
connect the engineering tool to the station that performs logging, specify the own remote head module (set
"Not Specified" in "Specify Redundant CPU"), and execute the operation.
4 TROUBLESHOOTING
108
4.3 Checking the System Status