Modbus Rtu Format; Modbus Rtu Command Format - Panasonic AFP7CPS4E User Manual

11.4 MODBUS RTU Format

11.4.1 MODBUS RTU Command Format

 MODBUS RTU command format
START
3.5-character
time
ADDRESS
(station no.)
FUNCTION
DATA
CRC
END
 Reception 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. Reception done judgment time is set at approx. 32 bits of time.
Baud rate
300
600
1200
2400
4800
9600
19200
38400
57600
115200
230400
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ADDRESS FUNCTION
8 bits 8 bits
8 bits, 0 to 247 (decimal)
(Note) 0 = Broadcast address
8 bits
Varies depending on commands.
16 bits
3.5-character time
(Differs depending on baud rate. Refer to the "reception judgment time" section.)
Reception done
judgment time
Approx. 106.7 ms
Approx. 53.3 ms
Approx. 26.7 ms
Approx. 13.3 ms
Approx. 6.7 ms
Approx. 3.3 ms
Approx. 1.7 ms
Approx. 0.8 ms
Approx. 0.6 ms
Approx. 0.3 ms
Approx. 0.14 ms
11.4 MODBUS RTU Format
DATA CRC CHECK
n*8 bits 16 bits
END
3.5-character
time
11-13