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13. Troubleshooting
13.1. EX245-SPN1A/SPN2A/SPN3A
No.
Problem
BF indicator is ON.
1
LINK indicator is OFF.
ACT indicator is OFF.
BF indicator is ON.
2
LINK indicator is ON.
ACT indicator is ON.
Table. 13-2 Troubleshooting for the problem with display on SF LED
No.
Problem
1
SF indicator is ON.
Table. 13-3 Troubleshooting for the problem with display on SF and BF LED
No.
Problem
SF and BF indicators
1
are flashing alternately.
SF and BF indicators
2
are flashing
simultaneously.
Table. 13-1 Troubleshooting for bus communication
Possible cause
The SI Unit is not connecting to any
network.
The SI Unit is physically connected to
any network but the following problem
has occurred.
No communication.
The IO Controller is defective.
Device name is not correct.
The GSD file is not correct.
The configuration data sent by the IO
Controller does not match the actual
layout.
Possible cause
US1 is below the permissible level
(< approx. 19.2 VDC).
The valve coil has a short circuit or the
connected module has a short circuit.
The connected module has
disconnected.
Possible cause
During firmware update.
During forced output mode by Web
server function.
Firmware update failed.
- 81 -
Remedy
Check the cable connection.
---
Check the cable.
Connect to the PROFINET
communication.
Check the IO Controller.
Check the device names.
Check the GSD file.
Configure the SI unit according to
the actual layout.
Refer to
Section
4.
Remedy
Check the power supply.
Check the solenoid valve for a
short circuit and the module short
circuit, error and/or layout.
Check the connected module.
Remedy
---
---
Update the firmware again.
No.EX※※-OMW0011-B
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