Maxiflex P3 PAC User Manual
57
-© Omniflex
UMM126XR18.pdf
The following table shows the information required to configure a subscription:
ITEM
DESCRIPTION
VALID RANGE
Change-of-State Required
This sets whether the subscription data block will be sent
when any data in the block changes.
Yes/No
Update time
This is the time between regular updates of data that will
be sent whether the data has changed or not.
1
– 120 seconds or
1
– 120 minutes
Local Port Number
This is the Network Port number on the network module in
the local (receiving) system to which the network
containing the remote (source) node is connected. This
item is only required if a local network ID is specified for
the Source Node Address, otherwise it should be set to 0.
0
– 3
On the P3 CPU:
0 = CPU network port
2 = CPU Serial Port
Refer to the relevant module
user manual for port numbers
on modules in other I/O slots.
Destination DIT Start Address
This is the DIT register address where the data will start
to be written in this CPU acting as the data sink.
0
– 65535
Source Node Address
This is the network address of the sending or source node
from which the required data originates.
This can be expressed as a local network address plus
the local slot and port to which the network is connected,
or it can be expressed as a global network address if
network routing is configured in the CPU.
Local network addresses:
1
– 125
Global network addresses:
128
– 254
Source DIT Start Address
This is the DIT register address of the first register in the
block of registers to be sent from the source node.
0
– 65535
Register Range
This is the number of 16 bit DIT registers that will be
transferred in the subscription
1
– 120
Table 8.1 Subscription Configuration Information
8.3 Number of subscriptions allowed
There is a limit to the number of subscriptions that a P3 CPU can receive, and a limit to the
number of subscriptions that it can send. The P3 CPU can be configured to receive
subscriptions from a maximum of 64 other nodes and can send subscriptions to a maximum
of 16 other receiving nodes.
In other words, each P3 CPU can act as data sink for 64 subscriptions, and data source for
16 subscriptions simultaneously.
8.4 Subscription Application Example
Refer to the diagram of a simple network below:
PSU
M12
6
x
x
Ou
tp
u
ts
PSU
M12
6
x
x
In
p
u
ts
CONET
Node Address 2
Node Address 5
Node 2 subscribes to
data from Node 5
