29
V1.0 | NRG EtherCAT User Manual | © 2022 | CARLO GAVAZZI LTD.
EN
7.3
Alarms – NRG Controller
Internal Error
Description
This alarm is issued when a problem arises within the internal circuitry of the NRG
controller. In the presence of this alarm, the NRG controller will try as much as
possible to proceed with normal operation. It is up to the user to detect the
presence of errors reported by the NRGC and take action accordingly.
When continuing operation with NRGCs reporting an internal error there is a risk
that communication may not work correctly or may not be possible, damage may
occur to the RG..N devices on the BUS if the internal error is caused by an
overvoltage on the supply lines.
Diagnose
Consider replacing the NRG Controller
Bus Error
Description
This error is issued in case of wrong messages exchanged between the NRG
Controller and the RG..Ns.
Diagnose
Not applicable
Device Limit Error
Description
More than 32 RG..Ns are detected on the NRG bus chain
Diagnose
Confirm that the number of RG..Ns connected to one NRG Controller is < 32
Termination Error
Description
This alarm is issued if the NRG controller detects that the BUS between the NRG
controller and the RG..Ns is not correctly terminated. This can be due to:
• An internal fault in the NRG controller (start of BUS termination)
• RGN-TERMRES is faulty
• An internal fault in the RG..N that affects the BUS
This Alarm will clear (unless alarm latching is selected) when the termination of the
BUS is found in order.
Diagnose
Make sure RGN-TERMRES is connected to the last RG..N on the NRG bus chain
Device Conflict Error
Description
Two RG..Ns on the same NRG bus chain have the same address.
Diagnose
Check internal bus connections. If bus connection is correct, do an auto
addressing command. Otherwise re-connect the bus as required.
Device Unconfigured Error
Description
An RG.N on the NRG bus chain does not have an address.
Diagnose
Perform an auto-addressing command
Device Position Error
Description
The position of some devices on the internal bus does not correspond to the stored
address
Diagnose
Check alarms on individual RG..Ns on the internal bus for more detail.
Power supply out of range
Description
The internal supply voltage of the NRG controller is not within the specified range.
Diagnose
Check that supply on Us+, Us- is within the specified range
