Omron 3G3AX-MX2-PRT-E User Manual page 59

Troubleshooting using the LED indicators
5-1-3 PROFIBUS Errors
Table 79 PROFIBUS Errors
Display & Indicators
If the PROFIBUS master is correctly configured and there are no wiring
errors, the COMM indicator will be ON and the BF indicator OFF. The table
below shows the indicator patterns caused by configuration PROFIBUS
errors.
Possible Cause(s)
The PROFIBUS master cannot communicate
with the Option Board because the PROFIBUS
configuration is not correct.
The PROFIBUS wiring is not correct.
The PROFIBUS network has not been termi-
nated correctly.
The Option Board detected too many commu-
nication errors.
Corrective Action
Check (and correct) the following items:
• Does the node address in your PROFI-
BUS master configuration program match
P180?
• Does any other slave device on the
PROFIBUS network also have the same
node address?
• Is the PROFIBUS master ON-LINE?
• If you are using OMRON CX-Configurator:
Make sure that the 'Enable DPV1 option'
on the 'DPV1' tab is NOT checked.
Check (and correct) the following items:
• Are the correct pins wired on the PROFI-
BUS connector?
• Are there any short circuits or line interrup-
tions?
• Are you using the correct cable type?
• If you have branches from the PROFIBUS
cable main line: Are any of these branches
too long?
Follow the instruction provided in the PROFI-
BUS Installation Guideline for Cabling and
Assembly to correctly terminate the network.
Check (and correct) the following items:
• Is the ground cable of the Option Board
connected to a ground terminal on the
@
MX2-A Inverter?
• Are the MX2 installation guidelines to
comply with EMC recommendations prop-
erly implemented (refer to MX2 User's
manual section D-1)?
• Are there any excessive EMI sources near
any of the cables or equipment?
Section 5-1
45