7-83
MODBUS RTU command message frame
START ADDRESS
FUNCTION
DATA
CRC
CHECK END
3.5-character time
8 bits
8 bits
n*8 bits
16 bits
3.5-character time
ADDRESS (Unit No.)
8 bits, 0 to 99 (decimal)
Note1) 0= Broadcast address
Note2) Slave unit No. is 1 to 99 (decimal)
Note3) For MODBUS, 0 to 247 (decimal)
FUNCTION
8 bits
DATA
Varies depending on commands.
CRC
16 bits
END
3.5-character time (Differs depending on baud rate. Refer to reception
judgement
time.)
Response in normal status
The same message as a command is returned for single write command.
A part of a command message (6 bytes from the beginning) is returned for multiple write command.
Response in abnormal status
In case a parameter disabled to be processed is found in a command (except transmission error)
Slave address (unit number)
Function code + 80H
Error code
CRC
One of either 1, 2 or 3
Error code contents
1: Function code error
2: Device number error (out of range)
3: Device quantity error (out of range)
Reception done judgment time
The process for receiving a message completes when the time that is exceeding the time mentioned
below has passed after the final data was received.
Baud rate
Reception done judgment time
2400
Approx. 13.3 ms
4800
Approx. 6.7 ms
9600
Approx. 3.3 ms
19200
Approx. 1.7 ms
38400
Approx. 0.8 ms
57600
Approx. 0.6 ms
115200
Approx. 0.3 ms
Note) The reception done judgment time is an approx. 32-bit time.
Содержание FP E Series
Страница 1: ......
Страница 16: ......
Страница 17: ...Chapter 1 Functions and Restrictions of the Unit ...
Страница 28: ...1 12 ...
Страница 29: ...Chapter 2 Specifications and Functions of the Unit ...
Страница 37: ...2 9 Circuit diagram C32 Y0 Y1 Y3 Y4 C28 Y0 Y1 Y3 Y4 Y2 Y5 to YF Y2 Y5 to YB ...
Страница 48: ...2 20 ...
Страница 49: ...Chapter 3 Expansion ...
Страница 56: ...3 8 Terminal layout diagram Note The numbers in the connector are for the first expansion ...
Страница 61: ...Chapter 4 I O Allocation ...
Страница 66: ...4 6 ...
Страница 67: ...Chapter 5 Installation and Wiring ...
Страница 90: ...5 24 ...
Страница 91: ...Chapter 6 High speed counter Pulse Output and PWM Output functions ...
Страница 116: ...6 26 ...
Страница 121: ...6 31 ...
Страница 125: ...6 35 Pulse output diagram ...
Страница 131: ...6 41 ...
Страница 139: ...6 49 ...
Страница 141: ...6 51 ...
Страница 144: ...6 54 Program Continued on the next page ...
Страница 145: ...6 55 ...
Страница 147: ...6 57 Program ...
Страница 151: ...Chapter 7 Communication Cassette ...
Страница 202: ...7 52 Procedure of communication In the following example the Micro Imagechecker is connected to COM1 port ...
Страница 210: ...7 60 The values of DT50 and DT51 are written in DT0 and 1 of PLC ...
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Страница 239: ...Chapter 8 Self Diagnostic and Troubleshooting ...
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Страница 249: ...Chapter 9 Precautions During Programming ...
Страница 260: ...9 12 Example 2 Using the CT instruction between JP and LBL instructions ...
Страница 268: ...9 20 ...
Страница 269: ...Chapter10 Specifications ...
Страница 286: ......
Страница 287: ...Chapter 11 Dimensions ...
Страница 290: ...11 4 11 1 3 Expansion Unit FPG XY64D2T FPG XY64D2P FPG EM1 ...
Страница 293: ...Chapter 12 Appendix ...
Страница 297: ...12 5 ...
Страница 437: ...12 145 12 7 ASCII Codes ...
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