Problems with communication with connected devices
Maintenance/Troubleshooting
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Check the communication line with the line monitor.
Is the operation of the Display or connected device overloaded?
Cause
Some functions, such as the D-script, global D-script, saving in the CF card, or hard-
copying of the GP screen, may apply a heavy load to the operation of updating the GP
screen. To determine the load, delete these functions once and check that the communi-
cation is done properly.
When scanning the program of the connected device takes time, the update of the display
stops and the communication appears to stop.
Solution
Follow the procedure below to check the load to the screen update operation. Also check
the scan time of the connected device.
Continued
• When two or more devices are connected to the GP, the reference time
required for the communication between the GP and connected devices
(communication cycle time) is stored in LS9400 to LS9527 in the LS Area in
the GP in the unit of ms.
• The GP3000 series allows the assignment of up to 4 drivers to one GP, and
one driver allows the connection of up to 32 devices, which may vary
depending on the type of the connected device.
Example: When drivers for Mitsubishi and Omron are assigned to the GP, and
one Mitsubishi device and one Omron device are connected, you
need to monitor LS9400 and LS9432.
When an Ethernet driver of Mitsubishi is assigned to the GP, and 32
devices are connected to one GP, you need to monitor LS9400
through LS9431.
• The addresses in the LS Area can be viewed by selecting [Peripheral List]
and then [List of Device/PLC Management Addresses] from [System
Settings Window] of GP-Pro EX.
)
1st PLC of Driver 1
LS9400
LS9431
LS Area
32nd PLC of Driver 1
1st PLC of Driver 2
LS9432
LS9463
LS9464
LS9495
LS9496
LS9527
32nd PLC of Driver 2
1st PLC of Driver 3
32nd PLC of Driver 3
1st PLC of Driver 4
32nd PLC of Driver 4
