Frequently Asked Questions
All DeviceNet Gateways, CDN066, CDN366, CDN466.
DeviceNet Configuration Program detects a device on the DeviceNet network but does not recognize the device as a Gateway.
In order for Configuration programs to determine what a device is, register the Gateway's EDS file with Configuration Program.
DeviceNet Configuration Program does not recognize Gateway after loading EDS file.
Check Major and Minor Revisions for Gateway and EDS file, to see if you have correct EDS file for your Gateway's firmware version.
Gateway does not appear on DeviceNet network.
Check wiring and cable connections.Check DeviceNet power supply voltage. Make sure Gateway baud rate matches network baud rate.Verify Gateway baud rate is set from rotary switches or retentive memory value.Make sure Gateway MAC ID is not used by another device.
NET LED is flashing red.
Gateway is removed from DeviceNet Master scanlist or network. Power cycle Gateway to reset.
NET LED is solid red.
Make sure Gateway MAC ID is not used by another device. Possible DeviceNet network failure.
MOD LED is flashing or solid red.
Gateway has failed. Cycle power to reset. Replace Gateway if necessary.
Rx LED does not flash green when data is sent to the Gateway.
If Sync Enabled, make sure Receive Toggle and Receive Acknowledge bits are being toggled. If application does not toggle Receive Acknowledge, Gateway will not receive data. Verify data is being received in Receive Data.
If Sync Enabled is disabled, verify data is being received in Receive Data.
Verify source device is transmitting data to Gateway.
Rx LED is solid red after Gateway receives data.
Check Serial Status for Rx buffer Overflow or Parity Error. Reset Gateway or clear Serial Status error bit if necessary. Make sure parity is set to match transmitting device.
Tx LED is solid red after receiving data from DeviceNet Master.
Check Serial Status for Tx buffer Overflow or Parity Error. Reset Gateway or clear Serial Status error bit if necessary. Make sure parity is set to match receiving device configuration.
Tx LED does not flash green when Gateway should be transmitting data.
Make sure Transmit Toggle is being toggled. If applicatoin does not toggle Transmit Toggle, Gateway will not transmit data. Verify data is being saved in Transmit Data.
All DeviceNet Gatways, CDN066, CDN366, CDN466. Allen Bradly PLC
1747-SDN Scanner displays error code 77.
Gateway I/O Produce Size and/or I/O Consume Size value do not match 1747-SDN I/O Rx/Tx settings. Make sure that the calculation for the Input and Output sizes accounts for any overhead or addition bytes that are sent with the data. Refer to the Manual for the device for more information.
All DeviceNet Devices
After setting the MAC ID on my device, the DeviceNet Master does not recognize it.
Disconnect the device from network before changing MAC ID. Make sure Gateway MAC ID is not used by another device. Verify that the MAC ID is set from switches or the retentive memory value. Verify DeviceNet baud rate.
NET LED is solid red.
The DeviceNet Node has experienced a recoverable fault. This is generally due to a confilict of the Baud Rate or MAC ID settings. Make sure that the device in question has the correct Baud Rate and that the MAC ID does not conflict with any other device on the network including the DeviceNet Master. Power cycle the Device to reset.
NET LED is off.
Check wiring and cable connections. Check DeviceNet power supply voltage.
Contact an Applications Specialist by sending an email to MKS Instruments, or call 512-719-8000.