JVL Industri Elektronik A/S - User Manual - Ethernet for MAC and MIS motors
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EtherNet/IP is object based similar to DeviceNet and follows the standards issued by
ODVA.
For more information on EtherNet/IP please visit
www.ODVA.org
for further details on
EtherNet/IP and to get the EtherNet/IP standard specification issued by ODVA.
The JVL implementation supports manufacture specific objects to gain access to each
register in the motor.
This manual assumes that the servomotor user manual has been read and a base knowl-
edge using the servomotor and the configuration software MacTalk is acquired.
The examples and screen shots in this manual are taken from MacTalk and a Rockwell
RSLogix5000 application.
Please be aware that other PLC vendors than Rockwell exist.
4.1.2
Abbreviations
The below general used terms are useful to know before reading the following chapters.
100Base -Tx 100 MBit Ethernet on twisted pairs.
IP
Internet Protocol - IP address ~ the logical address of the device which is user
configurable.
MAC
Media Access Controller - MAC address ~ the hardware address of the de-
vice.
MacTalk A windows PC based program supplied from JVL. This is an overall program
to install, adjust and monitor the function of the motor and a module installed
in the motor.
TCP
Transfer Control Protocol (an IP based protocol used widely on the internet)
UDP
User Datagram (an IP based protocol used widely on the internet)
DHCP
Dynamic Host Configuration Protocol (Automatic configuration of IP address
netmask and gateway from a DHCP server).
4.1.3
Daisy chaining
Up to 64 units (nodes) can be daisy chained. By daisy chained means making a direct cable
from the master in the system to motor 1 at the "L/A IN" connector at MAC motors and
the "CN2" connector at the MIS/MIL motors.
Continue from motor 1 "L/A OUT" (MAC) or "CN3" (MIS/MIL) to motor 2 “L/A IN”/
CN3 etc.
This method is saving hardware since no switch(es) is needed and can often be the sim-
plest way of doing the wiring.
The disadvantage is that the data will be delayed slightly depending on how many motors
that are daisy chained and the network load will be significant if a larger number of mo-
tors is connected this way.
Another and more common solution is to use a switch after the master and then distrib-
ute data to each node from this switch. This solution has a minimal delay of the data
stream.
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