Slave Station Setting - Mitsubishi Electric NZ2FTGN User Manual

Item
Response Monitoring Timer Value
Type Specification of The Target
MODBUS Device
Read Head Buffer
Setting/Write Memory Address
Setting
Target MODBUS
Device Head
Number
Access Points
For the setting range of the number of access points, refer to the content of the automatic communication parameters below.
 MODBUS/TCP Interface Module User's Manual (Details)

Slave station setting

Set the parameters of the NZ2FT-MT and each I/O module on the Web server. ( Page 304 Parameter list)
Description
The time from when the QJ71MT91 sends a request message to the NZ2FT-MT until the QJ71MT91 receives a response
message from the NZ2FT-MT
Setting time = Response monitoring timer value  500ms
The response monitoring timer starts when the QJ71MT91 sends a request message to the NZ2FT-MT.
When the response monitoring timer is completed, the QJ71MT91 determines that an error has occurred in the NZ2FT-
MT and disconnects the connection. Even after an error occurs, the QJ71MT91 establishes a connection and sends a
request message to the NZ2FT-MT when the repetition interval timer is completed.
Set the type of MODBUS device to be read/written.
The following lists the combinations of the values specified for the target MODBUS device type that can be set and the
MODBUS standard functions supported by the NZ2FT-MT. ( Page 307 MODBUS standard function)
Type Specification of The Target MODBUS Device
0000h: No Specification
0100h: Read Coils
0200h: Read Discrete Inputs
0400h: Read Input Registers
0500h: Read Holding Registers
0001h: Write Coils
0005h: Write Holding Registers
0505h: Read/Write Holding Registers
Set the start buffer memory address that stores the data read/written from/to the NZ2FT-MT.
The setting range of read data and write data is different as shown below.
• Read data: Start buffer memory address setting range 1000H to 1FFFH
• Write data: Start buffer memory address setting range 3000H to 3FFFH
From the setting details of the target MODBUS device type specification, specify the target bit address or register address
of the NZ2FT-MT. ( Page 309 Bit address, Page 309 Register address)
Type Specification of The Target MODBUS Device
0000h: No Specification
0100h: Read Coils
0200h: Read Discrete Inputs
0400h: Read Input Registers
0500h: Read Holding Registers
0001h: Write Coils
0005h: Write Holding Registers
0505h: Read/Write Holding Registers
Set the number of points to be read from the NZ2FT-MT or the number of points to be written to the NZ2FT-MT. The
range of points that can be set differs depending on the target MODBUS device type specification.
Target MODBUS device type specification
0000h: No Specification
0100h: Read Coils
0200h: Read Discrete Inputs
0400h: Read Input Registers
0500h: Read Holding Registers
0001h: Write Coils
0005h: Write Holding Registers
0505h: Read/Write Holding Registers
MODBUS standard function

01: Read coils
02: Read discrete inputs
04: Read input registers
03: Read holding registers
15: Write multiple coils
16: Write multiple registers
23: Read/write multiple registers
NZ2FT-MT target address

Bit address
Bit address
Register address
Register address
Bit address
Register address
Register address
Setting range of access points

Number of read points: 1 to 2000 points
Number of read points: 1 to 2000 points
Number of read points: 1 to 125 points
Number of read points: 1 to 125 points
Number of write points: 1 to 1968 points
Number of write points: 1 to 123 points
Number of read points: 1 to 125 points, number of write
points: 1 to 121 points
11 NZ2FT-MT
11.6 Parameter Settings
11
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