Problems with communication with connected devices
Maintenance/Troubleshooting
1-72
• Checking the load to the screen update operation
There are addresses called the LS Area in the GP and LS2036 in the LS Area stores the
display scan time (time required for screen update operation; Unit: ms). Monitor the
value stored in this address to check whether the load on the screen update operation is
heavy.
(1) Open the project file currently used, and place the Data Display specifying LS2036 on all
screens.
(2) Transfer the project file to the GP again.
(3) Monitor this value on the GP screen. If the value of LS2036 increases at specific occasions,
a D-script which applies a heavy load is executed at a certain timing, resulting in a longer
time required for the GP screen update operation.
In such a case, decrease the number of D-scripts or prevent multiple processes from being
executed at the same time.
• Checking the scan time of the connected device
Read the time required to scan the ladder program of the connected device and check if
the scan requires a longer time at specific occasions. If the ladder program operation
requires a long time, contact the manufacturer of the connected device.
• Since the value of LS2036 cannot be monitored from the
connected device, place the Data Display
5
2000
LS2036
LS2036
