User`s manual

Maxiflex T2 CPU User Manual 34 -© Omniflex
UMM124XBR04.pdf
Remote node 5 on the CONET network has digital information in DIT registers 620 to 627.
The Central Node 2 needs to monitor these digital inputs. A regular update time of every
10s is quite satisfactory to determine that the remote system is still connected and
functioning if nothing changes, but the data should be sent immediately if any of the digital
inputs changes state.
Node 2 is the Destination node (it sets up the subscription and receives the data). Node 5 is
the sending node, and requires no user configuration to participate in the subscription
process.
Fill in the following data into one of the eight subscription blocks in the Subscription Table in
the T2 CPU of Node 2 to configure this function:
NAME VALUE DESCRIPTION
Change of State Required Yes The data will also be sent whenever any bit the
DIT registers in the range 620-627 changes.
Update Time 10 The regular updates can be 10 seconds apart.
Local Port Number 0 The CONET network is Port 0 on the CPU
Destination DIT Start Address 100 This is the DIT Address where we want to start
writing the received data.
Source Node Address 5 The local CONET ID on the Conet network
Source DIT Start Address 620 The Source Data start at DIT address 620
Data Range 8 We require 8 DIT registers to be sent
Table 7.2 Subscription Block Data Example
When configured, Node 2 automatically requests a subscription with the following data from
Node 5 on the Conet network connected to the CPU:
Node 5 undertakes to send the contents of its own DIT registers 620 to 627 over the
network to node 2 whenever any of the registers changes, or every 10s if no change occurs
in that time. The information will be placed in node 2's DIT registers 100 to 107.
Node 2 can monitor the status of the subscription by monitoring the relevant bit in the
Subscription Status DIT register. If this bit is clear then the subscription is operating
successfully. If this bit is set, then the subscription has failed and received data is not valid,
or the subscription has not been correctly set.