Eaton easyE4 Manual page 630

10. Connection to other devices
10.1 Setting up a NET
10.1.1 Access on the NET
626
In order to be able to run a NET group, there must be an Ethernet connection between
the devices or device and PC.
There can be a max. of 8 easyE4 devices in a single NET group.
Access is based on various NET operands and function blocks.
1. Network markers (N, NB, NW, ND) (cyclical access)
Every single device in the group is allowed read access to the network markers
of the other devices in the group. In addition, each device has write and read
access to its own network markers. This makes it possible for each device to
provide up to 512 bits of data to the other stations in the group.
2. RN and SN bit markers (cyclical access)
The RN and SN operands make it possible to directly access the state of the
operands of another device on the NET. These operands are used to send and
receive Boolean values. Each station in the group has 32 RN (Receive NET) and
32 SN (Sent NET) bit markers available.
3. Transmitting double words with function blocks (acyclical access)
Each easyE4 device in the group has 32 PUT (PT) manufacturer function blocks
and 32 GET (GT) function blocks available for sending and receiving analog val-
ues in an event-driven manner.
4. NET synchronization
The device blocks in the NET group can be synchronized – please refer to
→ Section "NET-GROUP", page 591
Compatibility with easyNET
The easyNET devices in the easy800 series use their own custom CAN-specific trans-
mission. Accordingly, devices from the easy800 and easyE4 series cannot be phys-
ically connected to each other.
Existing .e60 programs can be migrated to .e70 programs for the easyE4 series. When
you do this, the easy800, devices that are used with the Remote I/O operating mode will
be converted to local expansions.
easyE4 10/19 MN050009 EN www.eaton.com