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14 Serial Communications
CP2E CPU Unit Software User’s Manual(W614)
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14-7-5 C
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The CP2E CPU unit supports the following Modbus-RTU commands.
The frame format used in Modbus-RTU slave mode is as follows:
Note
The CRC code is given in the order low byte, high byte.
Additional Information
Setting the slave address to 0 indicates a broadcast command. The CP2E CPU unit does not
return a response for broadcast commands.
Precautions for Correct Use
Precautions for Correct Use
Program retry processing in the application of Modbus-RTU master (PLC, Host computer, etc.)
when a transmission error or other communications error occurs.
z
Read Multiple Bits from the Auxiliary Area (W) (Read Coils)
Command (Modbus-RTU Master)
Note
The maximum number of coils depends on the assigned starting address.
Response (CP2E)
14-7-5 Command and Response Details
Supported Command List
Function Code
Modbus Name
Function
01 Hex
Read Coils
Reads multiple bits from the Auxiliary Area (W) of I/O
Memory
0
3
Hex
Read Holding Registers
Reads multiple words from the Data Memory (D)
06 Hex
Write Single Register
Write a channel to Data Memory (D)
0F Hex
Write Multiple Coils
Writes multiple bits to the Auxiliary Area (W)
10 Hex
Write Multiple Registers
Write multiple channel to Data Memory (D)
Slave address
Function code
Data
CRC
1 byte
1 byte
0 to 252 bytes
2 bytes (See note.)
Command and Response Details
Field name
Data length
Data
Function code
1 byte
01 Hex
Coil starting address
2 bytes
0 to 7FFHex (0 to 2047)
W0.00 to W127.15
Quantity of coils
2 bytes
1 to 7FFHex (1 to 2047)
Field name
Data length
Data
Function code
1 byte
01 Hex
Byte count
1 byte
N
Coil status
n bytes
n=N or N+1
Содержание SYSMAC CP Series
Страница 1: ...USER S MANUAL Cat No W614 E1 01 SYSMAC CP Series CP2E E D CP2E S D CP2E N D CP2E CPU Unit Software ...
Страница 3: ......
Страница 32: ...1 Overview 1 4 CP2E CPU Unit Software User s Manual W614 ...
Страница 44: ...3 CPU Unit Operation 3 8 CP2E CPU Unit Software User s Manual W614 ...
Страница 116: ...6 I O Allocation 6 8 CP2E CPU Unit Software User s Manual W614 ...
Страница 144: ...7 PLC Setup 7 28 CP2E CPU Unit Software User s Manual W614 ...
Страница 170: ...10 Interrupts 10 14 CP2E CPU Unit Software User s Manual W614 ...
Страница 200: ...11 High speed Counters 11 30 CP2E CPU Unit Software User s Manual W614 ...
Страница 272: ...12 Pulse Outputs 12 72 CP2E CPU Unit Software User s Manual W614 ...
Страница 278: ...13 PWM Outputs 13 6 CP2E CPU Unit Software User s Manual W614 ...
Страница 460: ...18 Programming Device Operations 18 28 CP2E CPU Unit Software User s Manual W614 ...
Страница 576: ...Revision 2 CP2E CPU Unit Software User s Manual W614 ...
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