Chapter 8 Troubleshooting; Troubleshooting By Symptom - Mitsubishi Electric MELSEC iQ-F Series User Manual

8
TROUBLESHOOTING
This chapter describes troubleshooting for BACnet communications.
8.1

Troubleshooting by Symptom

The following describes troubleshooting by symptom for BACnet communications. If an error has occurred in the Ethernet
module, identify the error cause with the engineering tool. ( MELSEC iQ-F FX5-ENET User's Manual,  MELSEC iQ-F
FX5-ENET/IP User's Manual)
Unable to communicate with another BACnet device.
When communications with another BACnet device cannot be performed, check the following items.
Check item
Is the IP address duplicated?
Is the instance number of the device duplicated?
Is another BACnet device ready to communicate?
Is the Ethernet module not in operation?
Is the packet sent to the correct destination?
Unable to synchronize the time with another BACnet device.
When the time cannot be synchronized with another BACnet device, check the following items.
Check item
Has the program been created to change the time of the FX5 CPU module at
the received time?
Is the Ethernet module configured as a destination for another BACnet
device?
Unable to set some properties.
If there are properties that cannot be set, check the following items.
Check item
Is it a property that cannot be changed?
Action
Correct the specified IP address.
Correct the specified instance number of the device.
Check another BACnet device.
Restart the operation of the Ethernet module.
Check the destination using an Ethernet packet monitor or other means.
Action
Create the program again.
Configure the Ethernet module as a destination for another BACnet device.
Action
Check that the BACnet standard does not define the property as
unchangeable or unwritable.
8.1 Troubleshooting by Symptom
8 TROUBLESHOOTING
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