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103
3
PARAMETERS
Description of parameters
(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).
Computer
Example: PU connector communication, Pr. 121 = "1" (initial value)
Example: PU connector communication, Pr. 121 = "9999"
Reception error Reception error
Converter
Converter Computer
ENQ
ACK
NAK
NAK
LF OFF OFF
Reception error Reception error
ENQ
ACK
NAK
NAK
ON
Wrong
Wrong
ENQ
ACK
Normal
ENQ
Wrong
ENQ
Wrong
LF OFF
ON
ConverterComputer
Converter Computer
HC2.book 103 ページ ２０１２年１１月１９日 月曜日 午前１０時５２分