Download  Print this page

Operation Selection At Communication Error Occurrence (pr. 121, Pr. 122, Pr. 502, Pr. 779) - Mitsubishi Electric FR-F700PJ Instruction Manual

Air-conditioning inverter.
Hide thumbs

Advertisement

Communication operation and setting
4.20.3

Operation selection at communication error occurrence (Pr. 121, Pr. 122, Pr. 502, Pr. 779)

You can select the inverter operation when a communication line error occurs during RS-485 communication from the
PU connector.
Parameter
Name
Number
Number of PU
121
communication
retries
PU communication
122
check time interval
Stop mode selection
502
at communication
error
Operation frequency
during
779
communication
error
The above parameters can be set when Pr. 160 Extended function display selection = "0".
(1)
Retry count setting (Pr. 121)
Set the permissible number of retries at data receive error occurrence. (Refer to page 230 for data receive error for retry)
When data receive errors occur consecutively and exceed the permissible number of retries set, an inverter 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 signal (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
Pr. 190 or Pr. 192 (output terminal function selection).
Example: PU connector communication, Pr. 121 = "1" (initial value)
Computer
Inverter
Inverter
Computer
ALM
Example: PU connector communication, Pr. 121 = "9999"
Computer
Inverter
Inverter
Computer
LF
222
Initial
Setting
Value
Range
0 to 10
1
9999
0
0
0.1 to
999.8s
9999
0
1
0
2
3
0 to
400Hz
9999
9999
Wrong
Reception error
OFF
Wrong
Reception error
OFF
Description
Number of retries at data receive error occurrence. If the number of
consecutive errors exceeds the permissible value, the inverter will
come to trip (depends on Pr. 502).
Valid only Mitsubishi inverter (computer link operation) protocol
If a communication error occurs, the inverter will not come to trip.
(NET operation mode at initial value)
RS-485 communication can be made. Note that a communication
fault (E.PUE) occurs as soon as the inverter is switched to the
operation mode with command source. (NET operation mode at
initial value)
Communication check (signal loss detection) time interval
If a no-communication state persists for longer than the permissible
time, the inverter will come to trip (depends on Pr. 502).
No communication check (signal loss detection)
At fault
Indication
occurrence
Coasts to stop
E.PUE
Decelerates to
After stop
stop
E.PUE
After stop
Decelerates to
stop
E.PUE
Continues
running at
Pr. 779
Motor runs at the specified frequency at a communication error.
Motor runs at the frequency used before the communication error.
(Refer to page 197)
Fault (E. PUE)
Wrong
Reception error
ON
Wrong
Reception error
ON
ON
At fault
Fault output
removal
Stop
Output
(E.PUE)
Output after
Stop
stop
(E.PUE)
Automatic
Without output
restart
functions
Operates
Without output
normally
Normal

Advertisement

Table of Contents

   Also See for Mitsubishi Electric FR-F700PJ

   Related Content for Mitsubishi Electric FR-F700PJ

Comments to this Manuals

Symbols: 0
Latest comments: