NK8000 Troubleshooting

We recommend that you test connections during the configuration process, so you can more easily narrow down the cause of any problems. This is because you may have problems in runtime where no error message is generated.

The NK823x Ethernet Port generated a fault

• Check power, vital function, and diagnostic LEDs.
• Use the Ping command to check the connection between the NK823x Ethernet Port and Desigo CC.
• Check network connection. Select Start > All Programs > Accessories > Command Prompt, and enter the following commands:
• ipconfig /all: Shows comprehensive information about the local computer IP configuration (for example, the IP address).
• ping n.n.n.n: Lets you check the communication with an IP network participant (“n.n.n.n” is the IP address to check).
• ping n.n.n.n -t: Lets you continuously check the communication with an IP network participant (“n.n.n.n” is the IP address to check).
• Netstat: Provides you the information about all established TCP/IP connections.
• arp -a: Displays the physical address translation table.
• If connection to NK823x is lost, reset the NK823x Ethernet Port to default IP address and download the configuration again. You can refer to the procedure Downloading the Initial NK823x Configuration from a Service Computer.

The gateway or panel does not respond

• Check the Local address and Baud rate fields in the gateway/panel configuration. If the local address or baud rate are incorrect, there is no communication in runtime and no error message is generated.

Trouble with the serial connection

• Check the diagnostic LED. Typical problems of RS232 communication are:
• Mix of RXD / TXD lines.
• Line length exceeds the maximum of 15m.
• Disturbances, caused by ground loops.
• Solve problems of exceeding line length by using:
• RS232 line drivers
• Fiber optic converters
• RS422 converters

NK823x malfunctioning with Patrol Agent service

• When special network services are used to export data via WSI from units such as Algorex, Sintony, DF8000, STT, connected to the NK823x –for example cloud services such as the Patrol Agent– the unexpected ReadPropertyMultiple network message causes the NK823x to stop working.
  To avoid this problem, you need to force single-read operations on the involved BACnet connections. Note that this setting can slow down the data communication, mainly by duplicating the delay of the alignment phase when the system starts up or the connection is re-established after a line down.
  The configuration option to set –in the BACnet device object of the networked subsystems– is the Use only read property that you can find in the Other Settings expander. Proceed as follows:
• In System Browser, under the NK823x object, select the [Device NK823x] object.
• In the BACnet tab, open the Other Settings expander.
• Select the Use only read property check box.
• Click Save .
• Repeat these steps for the Device object in all the units connected to the NK823x.
• Stop and then start again the BACnet driver.

When the fire system generates an event, Desigo CC can detect a misalignment with the panel configuration. The source event in Event List helps you to identify the misalignment.