CIRCUTOR QNA500 series - Manual (Page 30)

POWER QUALITY ANALYZER QNA500 8IO
QNA500 8IO Instruction manual 30 / 111
8.- POWER QUALITY ANALYZER SETUP (M-QNA500)
The QNA500 power quality analyzer can measure the voltages and currents of the electrical
installation, with the purpose of achieving the global supervision and control of the whole installation.
The following sections describe the main configuration options and the configuration options.
8.1.- COMMUNICATIONS
To access to the setup it’s recommendable to use WEB-Server or software provided by CIRCUTOR.
In case of using ETHERNET port, QNA500 is setup with DHCP as default, so if this is connected to a
LAN network, DHCP server of this LAN will provide IP addresses to each module automatically.
To know assigned IP address, or to assign an specific IP address, you can use IP setup software,
which ask you MAC address and allows you to set an specific IP to each module.
By default, QNA500 has following configuration:
• (QNA500): Device Number, Baud Rate, Length, Parity, Stop Bits: 2, 9600-8-N-1
All communication ports are MULTIPROTOCOL which means that you can communicate using any of
the supported protocols.
Available protocols are the following:
• MODBUS/RTU (on-line communications)
• MODBUS/TCP (on-line communications)
• CIRBUS (on-line communications)
• ZMODEM (protocol to download files)
• FTP (protocol to download files)
• HTTP (protocol to connect using Web-Browser)
8.2.- MEASUREMENT
The following measurement parameters can be configured:
TRANSFORMATION RATIOS:
• Voltage Primary / Voltage Secondary: It will be programmed in accordance with the voltage
transformer ratio used to take the measurement. Direct measurements must be programmed to
1/1. This ratio must not exceed 9999. Maximum primary and secondary values are 500000 and
999,9 respectively.
• Current primary: The current transformer primary used to measure the current will be
programmed. Maximum primary value is 10000.
• Current secondary: The current transformer secondary used to measure the current will be
programmed (default: 5 A).