Mitsubishi Electric FR-HC2-7.5K Instruction Manual page 110

(6) Retry count setting (Pr. 121)
 Set the permissible number of retries at data receive error occurrence. (Refer to page 102 for data receive error for retry.)
 If data receive errors occur consecutively and exceed the permissible number of retries set, the converter outputs the
alarm (LF). (The converter does not trip.)
 If "9999" is set, the alarm (LF) is output at a data communication error. (The converter does not trip.)
For the terminal used for LF signal output, set "98 (positive logic)" or "198 (negative logic)" to any of Pr. 11 to Pr. 16 (output
terminal function selection).
Example: PU connector communication, Pr. 121 = "1" (initial value)
Computer Converter
Converter Computer
LF
Example: PU connector communication, Pr. 121 = "9999"
Computer Converter
Converter Computer
LF
Wrong
Reception error
OFF
Wrong
Reception error
OFF
Description of parameters
Wrong
Reception error
ON
Wrong Normal
Reception error
ON OFF
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