Retry Count Setting (Pr.121, Pr.335) - Mitsubishi Electric FR-F800 Instruction Manual

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(N) Operation via communication and its settings
Retry count setting (Pr.121, Pr.335)
• Set the permissible number of retries at data receive error occurrence. (Refer to
• When the data receive errors occur consecutively and the number of retries exceeds the permissible number setting, a
communication fault (PU connector communication: E.PUE, RS-485 terminal communication: E.SER) occurs and the
inverter trips.
• When a data transmission error occurs while "9999" is set, the inverter does not trip but outputs the alarm (LF) signal.
To use the LF signal, set "98 (positive logic) or 198 (negative logic)" in any of Pr.190 to Pr.196 (output terminal function
selection) to assign the function to an output terminal.
Example: PU connector communication, Pr. 121 = "1" (initial value)
Computer
Inverter
Computer
Inverter
ALM
Example: PU connector communication, Pr. 121 = "9999"
Computer
Inverter
Inverter
Computer
LF
ALM
NOTE
• For the RS-485 terminal communication, the operation at a communication error occurrence depends on the Pr.502 Stop
mode selection at communication error setting. (Refer to
456
PARAMETERS
Illegal
Reception error
Illegal
OFF
page 455
Fault (E.PUE)
Illegal
Reception error
ON
Illegal
Reception error
Reception error
ON
ON
OFF
page
446)
for data receive error for retry.)
Normal

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