42 model 3000 Ethernet Module / DS Connection Module Operation Manual
Chapter 3 Setting
3
3.2.7 Settings for multicast routing network
Register the parameters as shown below, when EN7 module is connected to multicast 
routing network with multicast router.
(1) Set the IP address mode to free mode.
(2) Set the option switch 1.
(3) Set the multicast TTL.
Above (2) and (3) are explained here. Refer to 3.2.1 Network ID and subnet mask setting 
(1).
• Setting of the option switch 1
Set the option switch 1 to "ON" from the network parameter window of Engineering 
Too l.
• Setting of the multicast TTL
Register the multicast TTL from the network parameter window of Engineering Tool.
The selectable range is from 1 to 64. (Default value is 1.) Multicast TTL should be set 
to the value that is at least the number of multicast router existing the route from EN 
module to destination node plus 1. The multicast TTL is set to 3 in the network 
configuration as follows.
 
Multicast 
router 
Multicast 
router 
EN 
module 
PC etc.