Danfoss MCA 122 Modbus TCP, Руководство по эксплуатации

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At this time the “Danfoss” Protocol is assigned to the Scanner and the last step is to configure the scanner to read and
write holding registers of the FC 302.
By first selecting the Danfoss network and second, selecting the IO Scanning tab, the scanning list appears. Fill out the list
as shown in
Illustration 3.5 .
130BB261.11
Illustration 3.5 Scanning List
Menu Menu point Setting
IO Scanning IP address 192.168.001.030
Unit ID 255
Health Timeout 1500
Repetitive rate 60
RD Master Object %MW100
RD Slave Index 2910
RD Length 10
Last Value Hold Last
VR Master Object %MW200
VR Slave Index 2810
VR Lenght 10
Description -
Table 3.6 Menu Settings
This configuration copies the information stored from
%MW200 to %M209 in the PLC to the Holding register
2810 to 2819 of the FC 302. It reads the holding registers
2910 to 2919 of the FC 302 to the PLCs memory %MW100
to %M109.
3.4 IP Traffic
The use of Ethernet-based network for industrial
automation purposes, calls for careful and thorough
network design. Especially the use of active network
components like switches and routers requires detailed
know-how about the behaviour of IP traffic.
Some important issues
IGMP
IGMP (Internet Group Management Protocol) is an
integrated part of IP. It allows hosts to join or leave a
multicast host group. Group membership information is
exchanged between a specific host and the nearest
multicast router.
Spanning Tree Protocol (STP)
For an Ethernet network to function properly, only one
active path can exist between two nodes. Spanning-Tree
Protocol is a link management protocol that provides path
redundancy while preventing undesirable loops in the
network.
How to Configure MCA 122 Modbus TCP
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