Technical information

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Modicon M580 automation
platform
Ethernet Modbus/TCP network
Performance
Processing capacities of Modicon platforms
Processing capacity
Use the table below to compare, for each station, the total number of messages
received via the Modbus (or Uni-TE) messaging service if used (value R1, R2, or Ri)
with the capacity of the station CPU.
Processing of Modbus requests per PLC scan cycle:
Modicon M340, Modicon Premium/Atrium platforms Messages received
Total messages received by the
PLC from all the communication
modules (1)
TSX5710 4 messages/cycle
BMXP3420/TSX5720 8 messages/cycle
TSX5730 12 messages/cycle
TSX5740 16 messages/cycle
TSX5750/60 (2) 16/20 messages/cycle
Modicon
Quantum
platform
Integrated port limitations Communication module
limitations
Ethernet
modules
per PLC
All types of
communica-
tion request
Additional
read/write 4x
registers
All types of
communica-
tion request
Additional
read/write 4x
registers
140CPU113 (3) – – 1 message/
cycle
4 messages/
cycle
Up to 2
140CPU311 – – 1 message/
cycle
4 messages/
cycle
Up to 2
140CPU434/534 – – 4 messages/
cycle
8 messages/
cycle
Up to 6
140CPU651 16 messages/
cycle
16 messages/
cycle
4 messages/
cycle
8 messages/
cycle
Up to 6
Messages/cycle: number of messages received per cycle from the PLC master task (typical
cycle of 50 to 100 ms)
Example:
Quantum 140CPU43412p CPU with 4 Ethernet 140NOE771p1 modules:
- 20 messages/cycle for all types of communication request, and
- 32 messages/cycle for the read/write 4x registers
Ethernet transaction processing capacity
For each station, compare the total number of messages received S [values Ri, Rj]
and the total number of messages transmitted S [values Ei, Ej] (for station N, for
example) with the Ethernet transaction processing capacity shown below.
Use the elements below for the Ethernet connection per PLC, rather than the
number of transactions required by the application.
Ethernet
transaction
processing
capacity
Modicon M340 BMX Modicon Premium TSX Modicon Quantum 140
NOC0401 P342020
P342030
ETY210
ETY110WS
ETC101
WMY100
P5710/20/30/40
P5750
P5760
NOC77101
/78ppp
NWM10000
CPU65ppp
CPU67ppp
Modbus
messaging
500 transactions/s 500 transactions/s 60 transactions/s 450
transactions/s
500
transactions/s
350
transactions/s
350
transactions/s
I/O Scanning
service
2000
transactions/s
Server mode (5) Service not
available
2000
transactions/s (6)
2000
transactions/s
2000
transactions/s (6)
2000
transactions/s
Global Data
subscription
800 Service not
available
Service not
available
800
(6)
800 800
(6)
800
__________________________________________________________________
(1) A temporary overload, due for example to an adjustment terminal or the temporary
connection of an Internet browser, lasting for a few PLC scans, is permitted.
(2) Only with Unity Pro software.
(3) Only with Concept/ProWORX software.
(4) The BMXNOC0402 communication module will be replaced by the BMENOC03p1 modules
during the 2nd quarter of 2014.
(5) BMXP3420p0 CPUs with Modbus TCP messaging in server mode can be scanned by a
device with the I/O Scanning service.
(6) TSXWMY100 and 140NWM10000 modules do not have I/O Scanning and Global Data
services.
Performance (continued)
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