10. easyE4 communication Connection to other devices
10.12 Setting up a NET group
All easyE4 base devices feature an Ethernet port that can be simultaneously used for
all communications, e.g., web server, Modbus TCP, e-mail, and programming the
easyE4.
In order to be able to run a NET group, there must be an Ethernet connection
between the devices or device and PC.
10.12.1 Access on the NET
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 mark-
ers 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 values in an event-driven manner.
4. NET synchronization
The device blocks in the NET group can be synchronized – please refer to
→ Section "Time and Date setting", page 644
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 .e80 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02/24 MN050009ENEaton.com
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