CIRCUTOR CVM-MINI Series - Manual (Page 22)

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5 APPENDIX – CVM-MINI-ITF-HAR-RS485-C2 SERIES
The CVM-MINI Series has an analyzer for the harmonic content up to the 15
th
harmonic in voltage and current, showing the content on the LCD display. Therefore,
the HAR has a high number of display screens, where the value of the current and
voltage fundamental and the content of each harmonic may be seen.
The equipment’s display diagram is obtained by using the following procedure:
Figure 61. Display of Harmonic Content in Voltage and Current
6 MODBUS RTU PROTOCOL
The CVM-MINI power analyzer communicates using the MODBUS© protocol. In the
MODBUS protocol the RTU (Remote terminal Unit) mode is used; each 8-bit per byte
in a message contains two 4-bits hexadecimal characters.
The format for each byte in RTU mode is: