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NRG User Manual | © 2020 | CARLO GAVAZZI LTD.
V1.0 | NRG EtherNet/IP User Manual | © 2020 | CARLO GAVAZZI LTD.
EN
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
7.4
Alarms
–
RG..N
SSR Overtemperature
Description
This situation happens when the RG..N does not operate within the rated
specifications causing the SSR to overheat. The output of the RG..N is switched
OFF to prevent the RG..N from getting damaged due to overheating. When the
RG..N cools down, the alarm automatically recovers unless alarm latching is
selected, the Alarm LED is switched OFF, and the RG..N output can be switched
accordingly
Diagnose
Confirm that RG..N used is operated within the rated specifications (current
rating, spacing and surrounding temperature.
SSR Overtemperature Pre-warning
Description
This is not an alarm condition and has no effect on the function of the RG..N. The
Over-Temperature Pre-warning alarm is activated when the pre-warning margin
set on the RG..N is not respected. For example, the over temperature prewarning
has been set to 40degC and the actual delta is 39degC. In this case, the over
temperature prewarning alarm is activated. This alarm is re-set when the actual
temperature reading is ≥ 40de
gC. This alarm does not trigger the Alarm LED on
the RG..Ns.
Diagnose
Confirm that RG..N used is operated within the rated specifications (current
rating, spacing and surrounding temperature.
Load deviation alarm
Description
This alarm works in conjunction with the TEACH Voltage Reference, TEACH Current
Reference and TEACH % load deviation settings. If the values of the TEACH
Voltage and Current reference
are > 0 either through a ‘TEACH’ command or
updated manually; the load deviation alarm is activated.
With a TEACH command the values of Vref and Iref registers will be updated by
measuring the present current and voltage over a period of time. The TEACH
command is refuted in case of alarms present on the system. If the TEACH is
unsuccessful, the values of Vref and Iref will be cleared to 0. The TEACH
command does not take control of the output of the SSR, it is up to the user to
issue a TEACH command when the output is switched ON with a control
percentage of >5%. The duration of the TEACH procedure shall take up to a
maximum of 35s depending on the level of control percentage. A ‘Store
Permanently’ command is required after a TEACH command for the values of the
Vref and Iref to be saved permanently in the device for next power up.
The load deviation alarm is issued when a change in resistance > the % load
deviation setting is detected. The resistance is measured using the Voltage and
Current reference. The load deviation alarm is useful to detect changes in the
load either due to load degradation or partial load failure when more than one
load is connected to the SSR.
Diagnose
Check loads for degradation or partial load failure (in case of multiple loads with
1 RGx1A..N). Take into consideration the load thermal coefficient when setting
the percentage deviation in LDEVPR to avoid this alarm from being issued
unnecessarily.
