Specifications; Supported Command List; Memory Map; Used By Modbustcp Plc Program - Omron CS1W-ETN21 Quick Start Manual

MANUEL STA46

1. Specifications

1-1

Supported command list

Code
(Hex)
0x01 I/O memory area (CIO) Read Multiple Coils
0x02 I/O memory area (CIO) Read Multiple Coils
0x03 I/O memory area (DM) Read Multiple Registers
0x04 I/O memory area (CIO) Read Multiple Registers
0x05 I/O memory area Write Single Coil
0x06 I/O memory area (DM) Write Single Register
0x08 Echo back test
0x0F ***** NOT SUPPORTED ******
0x10 I/O memory area (DM) Write Multiple Registers
1-2

Memory map

1-2-0

Used by ModbusTCP PLC program

Modbus process
Type
Work Area
Receive Area
Send Area
Ethernet Unit flag & command switch (Unit n°0)
Type
Flag/command Area
Parameter Area
1-2-1

PLC area accessible by Modbus TCP request

Discrete Inputs
Coils
Input Registers
Holding Registers
*: area 5801 to 6143 is reserved for the ModbusTCP PLC program (see 1-2-0)
JP Viskovic 30/08/2005 OEE-F
Function
Memory address
W480 -511
CIO 5800 - 6000
CIO 6001 - 6143
Memory address
CIO1000- CIO1024
D 30000 - D30099
MODBUS PDU
Address Address
1 - 5120 0 - 5119
1 - 65536 0 - 65535
1 - 5801 0 - 57800
1 - 32768 0 - 32767
Name in MODBUS
Read Coils
Read Discrete Inputs
Read Holding Registers
Read Input Registers
Write Single Coil
Write Single Register
Diagnostic
Write Multiple Coils
Write Multiple Registers
Descriptions
Used for counter and calculation
Used to store received bytes
Used to prepare bytes to send
Descriptions
For more details see Op. manual W343
Corresponding CS/CJ's address
0 – 5119 (CIO 0.00 - CIO319.15)
0 – 65535 (CIO 0.00 – CIO4095.15)
0 – 5800 (CIO0 – CIO5800) *
0 - 32767 (D0 – D32767)
Modbus TCP
4