SMC Networks LECSN-T Series - 20.1.2 Communication specifications

20 - 5
20．PROFINET COMMUNICATION
20.1.2 Communication specifications
The following shows the communication specifications.
Item
Description
Remark
PROFINET
communication
specifications
PROFINET IO
Real Time (RT) communication
PROFIdrive v4.1
Physical layer
100BASE-TX
Communication connector
RJ45, 2 ports (port 1, port 2)
Communication cable
CAT5e, shielded twisted pair (4 pair) straight
cable
Double-shielded type recommended
Network topology
Line, Star, Ring, or a connection topology
where the topologies are used together
Variable communication
speed
100 Mbps (Full duplex)
Transmission speed
between stations
Max. 100 m
Number of nodes
Compliant with the specifications of the
standard Ethernet
Conformance class
Conformance class B (CC-B)
Real time class
RT_Class_1
Acyclic Data Exchange
Transmitting/Receiving: 1 channel each
Process Data (Cyclic Data
Exchange)
Transmission cycle: 1, 2, 4, 8, 16, 32, 64, 128,
256, 512 ([ms])
Variable mapping: compatible
Transmission cycle
= 31.25 µs × SendClockFactor ×
ReductionRatio
Setting range of SendClockFactor
(= 32)
Setting range of ReductionRatio
(= 1, 2, 4, 8, 16, 32, 64, 128, 256, 512)
Variable mapping
Telegram 102:
Maximum size: 48 bytes each transmitting/
receiving
Maximum number of mapping: 24 each
transmitting/receiving
Telegram 103:
Maximum size: 60 bytes each
transmitting/receiving
Maximum number of mapping: 30 each
transmitting/receiving
Byte order
Big endian
LED display
Network Status, Card Status, LINK/Activity (port
1, port 2)