CIRCUTOR QNA500 series - Manual (Page 28)

POWER QUALITY ANALYZER QNA500 8IO
QNA500 8IO Instruction manual 28 / 111
In a LAN network, servers have the option to assign IP addresses with an expiration
time from hours to weeks. This time is configurable on the server depending on the
target of the IT Administrator. After this time, the power quality analyzer must again
request an IP address. If the server is not active at that time, or the Ethernet cable is not
connected, IP address will be lost.
This means that if QNA500 power quality analyzer has DHCP option enabled, is
mandatory to have Ethernet cable always connected and DHCP server always active to
avoid this situation.
7.1.1.- IGMP CONFIGUARTION
IGMP default address is 225.0.10.10.
This address allows to each module to detect others and to communicate between them. To allow
management actions and communications between modules is mandatory that all MULTIFIT modules
have same IGMP address.
User must take care of following requirements:
• All modules must have same IGMP IP address
• IGMP range is from 224.0.0.0 to 239.255.255.255
• If two modules have different IGMP IP addresses, they don’t detect each other and they cannot
send messages between them.
• If exists Ethernet switches in the LAN, these cannot have activated multicast message filters
Some industrial switch are provided with IGMP message filters. Keep in mind that if this
switches are activated, QNA500 won’t be able to send messages between modules.