Rockwell Automation 20G PowerFlex 755 Drive Embedded EtherNet/IP Adapter - Manual (Page 36)

36 Rockwell Automation Publication 750COM-UM001E-EN-P - October 2013
Chapter 3 Configuring the Adapter
Custom Peer I/O Configuration
Peer I/O also allows more flexibility in sending custom data over the network,
but requires more configuration.
Follow these steps to set up the master (broadcast) side of custom peer I/O.
1. Decide how many Datalink parameters you want to transmit. Set
Parameter 87 - [DLs To Peer Cfg]
to that value.
2. Determine how the Datalinks are allocated.
The highest numbered of the 16 Datalinks are allocated to peer I/O. For
example, if Parameter 87 - [DLs To Peer Cfg] is set to ‘3’, then Datalinks
14, 15, and 16 are allocated to peer I/O. To avoid an overlap between
Master-Slave and peer I/O, make sure that Parameter 35 - [DLs To Net
Act]
plus Parameter 87 - [DLs To Peer Cfg] does not total more than 16.
3. Set Parameters 17 through 32 - [DL To Net 01-16] to the parameters you
want to transmit, based on the allocation in step 2.
4. Reset the adapter by power cycling the drive or by using the HIM’s Reset
Device function located in the drive’s DIAGNOSTIC folder so that
changes to Parameter 87 - [DLs To Peer Cfg] take effect.
5. Set Parameters 89 - [To Peer Period] and 90 - [To Peer Skip] as required
for your application.
Parameter 89 controls how frequently the adapter will transmit data when
it is changing. Parameter 90 controls how frequently the adapter will
transmit data when it is not changing.
6. Set Parameter 91 - [To Peer Enable] to a value of ‘2’ (Custom).
Follow these steps to set up the slave (receiver) side of custom peer I/O.
1. Decide how many pieces of data (Logic Command, Reference, and
Datalink parameters) you want to receive and set Parameter 76 - [DLs Fr
Peer Cfg]
to that value.
This must match the number of parameters transmitted by the master.
2. Determine how the Datalinks are allocated.
The highest numbered of the 16 Datalinks are allocated to peer I/O. For
example, if Parameter 76 - [DLs Fr Peer Cfg] is set to ‘3’, Datalinks 14,
15, and 16 are allocated to peer I/O. To avoid an overlap between Master-
Slave and peer I/O, make sure that Parameter 34 - [DLs From Net Act]
plus Parameter 76 - [DLs Fr Peer Cfg] does not total more than 16.
3. Set Parameters 1 through 16 - [DL From Net 01-16] to the parameters
you want to receive, based on the allocation in step 2.
IMPORTANT Because of the 32-bit REAL (floating point) Reference, the following method
works only if the drives transmitting and receiving are PowerFlex 750-Series
drives.