Operation Mode Switching And Communication Startup Mode (Pr.79, Pr.340) - Mitsubishi Electric Fr-A870-00550 Instruction Manual

• Operation from the error occurrence until the Pr.500 setting time elapses
Error definition Pr.502 setting
0
1, 11
Communication line 2, 12
3
4
0, 3
Communication
1, 2, 11, 12
option itself
4

When the communication returns to normal within the time period set in Pr.500, the communication option error (E.OP1) does not occur.
Displaying and clearing the communication error count (Pr.501)
• When a communication option is used, the cumulative count of communication error occurrences can be displayed. Write
"0" to clear this cumulative count.
• At the point of communication line error occurrence, Pr.501 Communication error occurrence count display is
incremented by 1.
• The cumulative count of communication error occurrences is counted from 0 to 65535. When the count exceeds 65535, the
displayed value is cleared and the counting starts over from 0 again.
Count timing depending on
communication line status
NOTE
• Communication error count is temporarily stored in the RAM memory. The error count is stored in EEPROM only once per
hour. If power reset or inverter reset is performed, Pr.501 setting will be the one that is last stored to EEPROM depending on
the reset timing.
Communication error reset operation selection at inverter fault and
Ready bit status selection (Pr.349)
• An error reset command from communication option can be invalid in the External operation mode or PU operation mode.
• The power input status can affect the Ready bit status of a communication option (when the FR-A8ND, FR-A8NF, or HMS
network option is installed).
Setting
Pr.349 N010 N240
NET operation mode
0 0 0 Reset enabled
1 1 0 Reset enabled
100 0 1 Reset enabled
101 1 1 Reset enabled

When 24 V external power is available for control circuit or power is input only to control circuit.
NOTE
• For details of the Ready bit, refer to
Operation mode switching and communication startup mode (Pr.79,
Pr.340)
• Operation mode switching conditions
- The inverter is at a stop;
- Both the STF and STR signals are off; and
- The Pr.79 Operation mode selection setting is correct. (Set with the operation panel of the inverter.) (Refer to
228.)
• The operation mode at power ON and at restoration from instantaneous power failure can be selected. Set a value other
than "0" in Pr.340 Communication startup mode selection to select the network operation mode. (Refer to
• After started in network operation mode, parameter write from the network is enabled.
(N) Operation via communication and its settings
Operation
Continued

Output shutoff
Decelerated to stop
Operation continues.
Normal Error
Communication reset selection
Other than NET
operation mode
Reset enabled
Reset disabled
Reset enabled
Reset disabled
page 622.
Indication Fault output
Normal indication Not provided

E. 1 lit Provided
E. 1 lit after stop Provided after stop
"CF" warning Not output
Normal Error
Incremented by 1 Incremented by 1
Description
Ready bit status selection
Main circuit: power-
ON
Ready bit: ON
Ready bit: ON
Ready bit: ON
Ready bit: ON

Main circuit: power-
OFF

Ready bit: ON
Ready bit: ON
Ready bit: OFF
Ready bit: OFF
page
page 237.)
487
PARAMETERS
2
GROUP
N