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(7) The L ER LED has turned on
Check the following items.
Check item
Ethernet cables have some problem.
The switching hub in the system is not operating normally.
Other stations connected to the temperature control module are
not operating normally.
The mode of the module on the master station is set to other than
Online.
The system is affected by noise.
Port connections are not correct to use the loopback function for
the master station.
(8) The LINK LED has turned off
Check the following items.
Check item
Ethernet cables have some problem.
The switching hub in the system is not operating normally.
If link-up processing is repeated due to a condition of a device on the line, it may take a longer time for the LINK LED to turn
on. This phenomenon may be eliminated by changing the module PORT into which the Ethernet cable is connected
(example: PORT1 PORT2).
For the wiring of Ethernet cable, refer to the following.
Page 93, Section 6.5
(9) The ERR.LED has turned on or flashes
Check the following item.
Check item
An error has occurred.
(10)The ALM LED has turned on or flashes
Check the following items.
Check item
An alarm has occurred.
Some channels are not connected to a temperature sensor.
A loop disconnection has been detected.
• Check that 1000BASE-T-compliant Ethernet cables are used. (User's manual for
the master/local module used)
• Check that the station-to-station distance is 100m or less.
• Check that the Ethernet cables are not disconnected.
• Check that a 1000BASE-T-compliant switching hub is used. (User's manual for the
master/local module used)
• Check that the power supply of the switching hub is on.
Check that the power supplies of the other stations are on.
Change the mode of the module to Online.
Check the wiring condition of the Ethernet cables.
If the loopback function is enabled for the master station, check that the ring topology is
correctly configured for the port where the L ER LED is on. (User's manual for the
master/local module used)
• Check that 1000BASE-T-compliant Ethernet cables are used. (User's manual for
the master/local module used)
• Check that the station-to-station distance is 100m or less.
• Check that the Ethernet cables are not disconnected.
Check that the power supplies of the switching hub and other stations are on.
Check the error code with the engineering tool and take actions according to the
descriptions in the lists of error codes. (Page 271, Section 11.2)
Check the alarm code with the engineering tool and take actions according to the
descriptions in the list of alarm codes. (Page 277, Section 11.3)
Set Stop (0) to CH Stop mode setting (address: 118H, 148H, 178H, 1A8H) for the
channels that are not connected to a temperature sensor. (Page 336, Appendix 3
(27))
Check for a load disconnection, external device failure, and sensor disconnection.
CHAPTER 11 TROUBLESHOOTING
Action
Action
Action
Action
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Table of Contents
Troubleshooting
