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Chapter 7 Application Interface
The EN6 modules provide status information on each of the sockets used by a user
application and diagnostic information on the transmission lines connected to the EN6
modules in the network through the station bus. Information on each socket comes in two
types: single Ethernet socket information and dual Ethernet socket information. (If the
dual Ethernet modules - EN621, EN641, EN661 - are used with single Ethernet sockets,
refer to single Ethernet socket information.) Addresses are different on the station bus
through which each block of status information is provided.
Application information on the station bus has the structure shown below.
Note:
EN state information is valid on EN651, EN651A, EN661 only.
The user application of the S/L controller refers to socket information on the basis of
access from the S/L controller. It is expressed in words. CntBase varies in value
depending on the slot where an EN6 module is installed. Mounting slot values are shown
in a later item.
The number of sockets user can use are as follows.
EN611, EN621, EN631, EN641 :
24
EN651, EN651A, EN661:
48
Above the numbers are on single socket interface. They become half on dual socket
interface.
Note:
It is prohibited to use single and dual socket interface at the same time.
Access from S/L controller
System reserve
EN state information
(%NW13. C 130656)
Dual Ethernet
socket information
EN_SOCKET2_*
(%NW13. C 130784)
Transmission diagnosis
result (Line A)
EN_NODEMAPA_*
(%NW13. C 130912)
Transmission diagnosis
result (Line B)
EN_NODEMAPB_*
(%NW13. C 130928)
Single Ethernet
socket information
EN_SOCKET_*
(%NW13. C 130944)
System reserve
