Delta AH500 - 11.3.2 Modbus TCP Data Exchange; 11.3.2.1 Modbus TCP Data Exchange; 11.3.2.2 Modbus TCP Data Exchange - PLC Parameter Setting

AH500 Hardware and Operation Manual
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11.3.2 Modbus TCP Data Exchange
11.3.2.1 Modbus TCP Data Exchange
Data exchange between electronic devices can be achieved via Modbus TCP protocol. Through Modbus TCP
protocol, users can exchange data among Delta devices and any 3
rd
party devices, as long as they comply with
the Modbus TCP standard. A chart showing information concerning Modbus TCP data exchange is provided
below.
Communication mode
Modbus TCP
Maximum number of
connections
*1
AHCPU500-EN, AHCPU501-EN
16
AHCPU510-EN, AHCPU511-EN
32
AHCPU520-EN, AHCPU521-EN,
AHCPU521-DNP
64
AHCPU530-EN, AHCPU531-EN
128
Communication protocol
Standard Modbus TCP/IP and AH communication protocol
Maximum quantity of data
which can be read/written
Remote terminal unit
AH500 series
CPU module
400 words
6400 bits
DVP series PLCs
100 words
100 bits
Others
100 words
100 bits
Supported devices Remote terminal unit
AH500 series
CPU module
X, Y, M, SM, SR, D, T, C,
S, E
DVP series PLCs
X, Y, M, D
Others
Logical address
0x0000~0xFFFF
Supported models
AHCPU500-EN, AHCPU510-EN, AHCPU520-EN, AHCPU530-EN,
AHCPU501-EN, AHCPU511-EN, AHCPU521-EN, AHCPU531-EN,
AHCPU521-DNP
*1. The maximum number of connections is equal to the number of Modbus TCP data exchange blocks plus the
number of Ether Link data exchange blocks. The number of Ether Link data exchange blocks in a PLC is the
number of nodes of which the PLC demands data, and the nodes to which the PLC provides data are not counted.
11.3.2.2 Modbus TCP Data Exchange - PLC Parameter Setting
Double-click HWCONFIG, and then double-click CPU. After CPU is double-clicked, the PLC Parameter
Setting window will be opened.