Communication operation and setting
Parameter
6 - 236
Retry count setting (Pr. 121)
Set the permissible number of retries at data receive error occurrence. (Refer to page 6-252 for data re-
ceive error for retry.)
When data receive errors occur consecutively and exceed the permissible number of retries set, an in-
verter trips (E.PUE) and a motor stops (as set in Pr. 502).
When "9999" is set, an inverter fault is not provided even if data receive error occurs but an alarm sig-
nal (LF) is output.
For the terminal used for the LF signal output, assign the function by setting "98 (positive logic) or 198
(negative logic)" in any of Pr. 190 to Pr. 192 "Output terminal function selection".
쑶
Example
쑴
PU connector communication at different settings of parameter 121
I001354E
Fig. 6-117:
Data transmission error
NOTE
Pr. 121 is valid only when Mitsubishi inverter (computer link operation) protocol is selected. Pr. 121
is not valid when Modbus®-RTU communication protocol is selected.
ENQ
ACK
NAK
NAK
ENQ
ACK
NAK
NAK
ENQ
ACK
ENQ
ENQ
Computer
Data flow
Inverter
Inverter
Data flow
Computer
Wrong
Reception error
Fault E.PUE
Reception error
Wrong
PU connector communication, Pr. 121 = 1 (initial value)
PU connector communication, Pr. 121 = 9999
Reception error
Reception error
Computer
Data flow
Inverter
Inverter
Data flow
Computer
OFF
OFF
ON
Wrong
Wrong
Normal
LF
OFF
ON
Содержание fr-e700 series
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Страница 20: ...Contents XVI ...
Страница 112: ...Operation panel Operation 4 20 ...
Страница 154: ...External operation Basic settings 5 42 ...
Страница 528: ...CC Link IE Field Network Basic Parameter 6 374 ...
Страница 562: ...Meters and measuring methods Troubleshooting 7 34 ...
Страница 606: ...A 30 Index Appendix ...
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