Problems with communication with connected devices
Maintenance/Troubleshooting
1-64
Is an error starting with RHAA036 to RHAA039 displayed?
Cause
Errors starting with RHAA036 to RHAA039 are displayed when an address outside of
the specified range is used.
Solution
The addresses of an unsupported connected device may be used by the parts on the
screen or scripts. These errors may occur on all screens if such unsupported addresses
are used by the parts or functions which generate communication on all screens, in par-
ticular (Example: System data area, alarm, sampling, global D-script, global window,
logic program).
Follow the procedure below to check if any devices use unsupported addresses.
(1) From the [Project] menu of GP-Pro EX, expand [Utility] and select [Cross Reference].
(2) When the [Cross Reference] dialog box appears, select [All] from the [Target] drop-down
list.
Check if any of the following points are true for the addresses displayed in blue
according to the error code.
• Error codes RHAA036 and RHAA037
Check if any addresses outside of the range of the device addresses supported by GP-
Pro EX are used.
• Error code RHAA038
Check if the Data Display or a D-script tries to read a write-only device.
• Error code RHAA039
Check if a switch or a D-script tries to write to a read-only device.
• For the range of the device addresses supported by GP-Pro EX and write-
only/read-only devices, see “Supported Devices” in each driver manual of
“GP-Pro EX Device/PLC Connection Manual”.
