Mitsubishi Electric FR-F740 EC Instruction Manual page 464

Communication operation and setting
Automatic baud rate recognition (Pr. 726 "Auto Baudrate/Max Master")
Automatic changing of baud rate is available with Pr. 726 setting. When Pr. 726 = "128 to 255",
turn the power ON from OFF or reset the inverter to start automatic baud rate recognition.
Pr. 726 setting
Tab. 6-98:
NOTES
After the baud rate recognition, the recognized baud rate is written in E
regardless of Pr. 342 "Communication E
BACnet status monitor displays "1" during automatic baud rate recognition.
Communication error count monitor is not performed during automatic baud rate recognition.
During automatic baud rate recognition, inverter does not transmit data, but only accepts
data.
Automatic baud rate recognition cannot finish if inverter is not connected to the communica-
tion bus. (BACnet protocol will not be established.)
Automatic baud rate recognition cannot finish if inverter is receiving abnormal data continu-
ously. (BACnet protocol will not be established.)
6 - 314
Description
0–127 Automatic baud rate recognition is invalid (Using Pr. 332 setting for baud rate)
Inverter monitors the data on the communication bus, and changes the baud rate from
128–255
Pr. 332 setting. The recognized baud rate is written to Pr. 332.
Pr. 726 settings
2
PROM write selection" setting.
Parameter
2
PROM of Pr. 332