Problems with communication with I/O units
Maintenance/Troubleshooting
1-77
1.5.3 Communication fails with the GP3000 Series
PROFIBUS Slave Unit
Is an error message displayed?
Cause
Communication cannot be established with the GP3000 Series PROFIBUS Slave Unit
when an error messages appears on the Display.
Solution
Is the connected device correctly set with GP-Pro EX?
Cause
The connected device may not be correctly set with GP-Pro EX.
Solution
Check if [PROFIBUS DP Slave] is selected from [PROFIBUS International] in the set-
ting of the connected device.
Is the PROFIBUS cable properly connected?
Cause
The PROFIBUS cable may not be properly connected.
Solution
Reconnect the PROFIBUS cable firmly. For details about the cable connection, refer to
the following manual.
)
GP3000 Series PROFIBUS Slave Unit User Manual
Is the PROFIBUS (Slave) Unit properly connected to the GP unit?
Cause
The PROFIBUS (Slave) Unit may not be properly connected to the GP unit.
Solution
Turn OFF the GP unit and then disconnect the power supply cable. Check if any connec-
tor pins are bent or broken. Check that the connection between the PROFIBUS (Slave)
Unit and the GP unit is correct. Turn ON the GP unit. If “PWR” and “ERR” LEDs do not
turn ON after turning the power ON, the PROFIBUS (Slave) Unit may be faulty. Please
contact your local GP distributor.
)
“1.7.2 Contact us!” (page 1-164)
• For details about the error messages, refer to the following page.
)
“1.6.3 Errors displayed with an expansion unit u When the PROFIBUS is used”
(page 1-162)
