Panasonic AFP7CCM1, Руководство пользователя

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11.4 MODBUS RTU Format
11-13
11.4 MODBUS RTU Format
11.4.1 MODBUS RTU Command Format

MODBUS RTU command format
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
(station no.) 8 bits, 0 to 247 (decimal)
(Note) 0 = Broadcast address
FUNCTION 8 bits
DATA Varies depending on commands.
CRC 16 bits
END 3.5-character time
(Differs depending on baud rate. Refer to the "reception judgment time" section.)

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 Reception done
judgment time
300 Approx. 106.7 ms
600 Approx. 53.3 ms
1200 Approx. 26.7 ms
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
230400 Approx. 0.14 ms
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