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NRG User Manual | © 2020 | CARLO GAVAZZI LTD.
V1.0 | NRG EtherNet/IP User Manual | © 2020 | CARLO GAVAZZI LTD.
EN
6.
Functions
6.1
Functions overview
The NRG solid state relays are equipped with a range of functionality within one device. For a list of some of the
features refer to the table below.
Feature
RGx1A..CM..N
External Control
X
ON / OFF Control
X
Power Control
X
Monitoring of system parameters
X
SSR diagnostics
X
Load diagnostics
X
Overtemperature protection
X
6.2
Switching modes
ON / OFF mode
The ON-
OFF mode controls the solid state relays at the user’s command. Through an I/O output message, the
RG..N
can be controlled using the control level. A control level of 0% indicates SSR output OFF and a control level of 100%
indicates SSR output ON.
The advantages of this mode are:
• It is effectively a direct replacement of the A1
-A2, i.e. for existing systems, the control algorithm within the PLC can
be left relatively untouched and the output is redirected via the communication interface.
All RG..Ns on the bus chain can be controlled within 10ms.
Burst Firing mode
The Burst firing mode works with the control level and a time-base parameter which can be varied from 0.1 seconds
to 10 seconds. The percentage ON time is then determined by the control level via an I/O output command.
Therefore, with a control level of 10% ;10% of the time-base will be ON and 90% will be OFF. The figure below shows
example waveforms of this firing mode at different control levels. In this example the time base was set to 1 second.
The percentage control resolution depends on the timebase set by the user. To achieve a 1% resolution, the time
base has to be a minimum of 2 sec for 50Hz and 1.7 sec for 60Hz.
Output with Burst firing mode @ 33% control level
Output with Burst firing mode @ 50% control level