116
LED Indicators and Error Processing
Section 7-1
7-1
LED Indicators and Error Processing
The DeviceNet PCI Board have an MS (Module Status) indicator that indi-
cates the status of the Board itself and an NS (Network Status) indicator that
indicates the status of the Network. These indicators show when an error has
occurred and what type of error it is.
This section explains the meaning of the LED indicators and the processing
required when an error has occurred. This explanation assumes that the
Board has been installed and set up properly.
Indicator Status during
Normal Operation
The following table shows the status of the MS and NS indicators during nor-
mal operation.
Indicator Status when an
Error has Occurred
The following table shows the status of the MS and NS indicators when an
error has occurred and lists probable causes for the errors.
Indicator status
Network/Board status
Comments
MS
NS
OFF
OFF
Waiting for initialization
Boot program initialization processing is being executed.
Flashing
(green)
OFF
Waiting for start of scanner pro-
gram
Scanner firmware initialization processing is being executed.
ON
(green)
OFF
MAC ID (node address) duplica-
tion check in progress
Waiting for online request or the request has been received and
a node address duplication check is in progress between the
Board and other nodes in the network.
ON
(green)
Flashing
(green)
Remote I/O communications
stopped and message communi-
cations not established.
Communications have not been established with other nodes
even though the Board is online.
With message communications, this indicates that the local
node has not sent a message to another node and that a mes-
sage has not been received from another node.
ON
(green)
ON
(green)
Remote I/O or message commu-
nications in progress.
Indicates normal communications when remote I/O and/or mes-
sage communications are active.
Indicator status
Error
Probable cause and remedy
MS
NS
Flashing
(red)
No
change
Hardware error
(EEPROM)
An EEPROM error occurred.
Replace the Board.
Flashing
(red)
OFF
PC watchdog timer error
The Board’s PC watchdog timer management function detected a
PC watchdog timer error. (The computer application has stopped.)
Restart the computer application or the computer itself.
ON
(red)
OFF
Hardware error
(Watchdog timer or RAM)
One of the following hardware errors occurred:
• Board watchdog timer error
• RAM error
Replace the Board
No
change
ON
(red)
Node address duplication
The Board’s node address has been set on another node.
Change the node address settings to eliminate the duplication.
Restart the computer or reset the Board.
Bus off detected
Communications were stopped because a large number of data
errors occurred.
• Check the communications baud rate settings in all of the nodes.
• Check that the cable lengths (trunk and drop lines) are within
specifications.
• Check for loose or broken cables.
• Check that there are Terminating Resistors at each end of the
trunk line and nowhere else in the network.
• Check for excessive noise.
Summary of Contents for DeviceNet 3G8F7-DRM21-E
Page 1: ...OPERATION MANUAL Cat No W381 E1 02 3G8F7 DRM21 E DeviceNet PCI Board ...
Page 2: ...3G8F7 DRM21 E DeviceNet PCI Board Operation Manual Revised July 2005 ...
Page 3: ...iv ...
Page 5: ...vi ...
Page 29: ...12 Preparation for Operation Section 1 8 ...
Page 67: ...50 PC Watchdog Timer Management Function Section 3 11 ...
Page 115: ...98 Maintenance API Functions Section 4 7 ...
Page 131: ...114 Remote I O Communications Characteristics Section 6 1 ...
Page 145: ...Index 128 ...
Page 147: ...130 Revision History ...