How to Use the Node Terminal Block
Appendix 2
228
Connection mode 2) Connecting with the Loop Control Unit at another node PC and
the computer on which CX-Process Monitor is running
Data link table settings
Item
Description
Data link type
Any setting
Link start word
Leading address (S) of Data Memory for the node
terminals (on CPU Unit)
Self node leading send word
Leading address (S) of Data Memory for the node
terminals (on CPU Unit)
Number of self node send words
636 words
Number of receive offsets from other node
(PC)
100 words x (number of PC nodes)
Note:
Of these words, the 100 words of the Area to
receive from all nodes at the self node
address are dummy words and cannot be
used.
Receive offset from other node (PC)
Self node + 1 is 436 words.
Otherwise 536 words
Note:
The reason for setting the receive offset to
436 words and not 536 words is to allow
reception of the 100 dummy words.
Placement order of send area and receive
area
Send area
receive area
Node address of receive area: Small number (#1) to
large number (max. #32)
Description of above settings
Area
Send/
Receive
Number of
words
Description
System information
(24 words)
Sent to computer on which CX-Process
Monitor is running
Area to send to computer
(512 words)
Sent to computer on which CX-Process
Monitor is running
Uppermost 100
words
The node (self node +1) receives these
100 dummy words at the Area to receive
from all nodes of the self node address.
Area to send to all nodes
(100 words)
Send
636
Other nodes receive these 100 words.
Area to receive from all
nodes
Ascending order from #1 in
order of node address
Receive
100 words
x number
of receive
nodes
100 words each are received from the
Area to send to all nodes of each node
address.
Note:
As self data cannot be received
at the Area to receive from all
nodes of the self node address,
the uppermost 100 words of the
Area to send to computer of the
node (self node -1) are received
as dummy words.
Note 1
In a Controller Link Data Link (user setting), the send and receive areas can be placed
regardless of the node address order. However, when the Node Terminal block of this Loop
Control Unit is to be used, place the send areas at the leading position and then place the
receive areas in order of node address.
Self send data, however, cannot be received over the Controller Link. For this reason, receive the
uppermost 100 words of the Area to send to computer of the node (self node +1) as dummy
words at the receive area corresponding to the self node address as described above so that the
data of all node addresses including the self are placed in the Area to receive from all nodes in
node address order. Note that the data of other nodes cannot be received correctly when the
receive area is not to be placed in node address order.