16
NRG User Manual | © 2020 | CARLO GAVAZZI LTD.
V1.0 | NRG EtherNet/IP User Manual | © 2020 | CARLO GAVAZZI LTD.
EN
5.
Communication
5.1
Exclusive Owner Connection
–
Implicit Messaging
The implicit data associated with the Exclusive owner connection includes parameters measured by each NRG
solid state relay as well as the control value from the PLC to control each solid state relay. Start-up parameters are
delivered on connection established for each end device. Refer to the below tables for the list of information
provided via implicit messaging.
Connection path: 20 04 24 66 2C 64 2C 65
Request Packet Rate (RPI) range: 8ms
–
512ms
Time out Multiplier Range: 4 - 512
Input Data
Data
Data type
Hold Current Reading
uint16
Voltage RMS Reading
uint16
Frequency Reading
uint16
Current RMS Reading
uint16
Apparent Power Reading
uint16
Real Power Reading
uint16
The current measurement is returned as scaled integers. Therefore, a current value of 16.81A will be received as
1681. The PLC program has to convert the numbers into floating point values. For further information regarding the
scaling of each measurement, refer to the Measurements section in this User Manual.
Note
: ‘Ref’ terminal connection is required for Voltage, Apparent Power and Real Power readings. Otherwise the
readings of these parameters will be 0.
Output Data
Data
Data type
Control level (0 -100%)
uint8
In case of
ON/OFF
control mode, a control level
< 100%
shall indicate SSR output
OFF
and a control level of
100%
shall indicate SSR output
ON
.
For the
Power control
firing modes (Burst, Distributed full cycle and Advanced full cycle) the
% control value
shall be
translate to
% power
of the SSR output. Refer to Section 6.2 for more information on Switching Modes.
5.2
Input Only Connection
–
Implicit Messaging
Implicit data from the Input only connection includes the alarming data from each end device connected on the
bus chain as well as the NRG controller. Additionally, configuration and communication status data for each end
device is also transferred. With this connection there are no configuration parameters.
Connection path: 20 04 23 6B 2C 69 2C 6A
Request Packet Rate (RPI) range: 8ms
–
512ms
Time out Multiplier Range: 4 - 512
Fixed data irrespective of active devices:
Name
Data type
Description
Unused Data
2 bytes, WORD,
big-endian encoding
reserved for future use
NRG Controller Status
2 bytes, WORD,
big-endian encoding
Bit 0
–
NRG Controller reset Flag
Bit 1
–
Not used
Bit 2
–
Internal error alarm Flag
Bit 3
–
Not used
Bit 4
–
Bus error Flag
Bit 5
–
Device limit error Flag
