Mitsubishi Electric FR-A720-0.4K Instruction Manual page 351

Alarm history
Register
40501 Alarm history 1
40502 Alarm history 2
40503 Alarm history 3
40504 Alarm history 4
40505 Alarm history 5
40506 Alarm history 6
40507 Alarm history 7
40508 Alarm history 8
Data Description
H00 No alarm
H10 E.OC1
H11 E.OC2
H12 E.OC3
H20 E.OV1
H21 E.OV2
H22 E.OV3
H30 E.THT
H31 E.THM
H40 E.FIN
H50 E.IPF
H51 E.UVT
H52 E.ILF
H60 E.OLT
* Refer to page 387 for details of alarm definition.
(7) Pr. 343 Communication error count
You can check the cumulative number of communication errors.
Parameters
343
CAUTION
The number of communication errors is temporarily stored into the RAM. As it is not stored into the EEPROM, performing
a power supply reset or inverter reset clears the value to 0.
(8) Output signal LF "minor failure output (communication error warnings)"
During a communication error, the minor failure output (LF signal) is output by open collector output. Assign the
used terminal using any of Pr. 190 to Pr. 196 (output terminal function selection).
Master
Alarm data
Slave
Communication
Error count
(Pr. 343)
OFF
Signal LF
CAUTION
The LF signal can be assigned to the output terminal using any of Pr. 190 to Pr. 196. When terminal assignment is changed, the
other functions may be affected. Please make setting after confirming the function of each terminal.
Definition
Alarm code list
Data Description
H70 E.BE
H80 E.GF
H81 E.LF
H90 E.OHT
H91 E.PTC
HA0 E.OPT
HA3 E.OP3
HB0 E.PE
HB1 E.PUE
HB2 E.RET
HB3 E.PE2
HC0 E.CPU
HC1 E.CTE
HC2 E.P24
Setting Range Minimum Setting Range
(Read only)
Alarm data Normal data
Not increased
0
ON
Communication error count is increased in
synchronization with leading edge of LF signal
Communication operation and setting
Read/Write
Read/write
Read
Being 2 bytes in length, the data is stored as
Read
"H00 ". The error code can be referrred to in
Read
the low-order 1 byte.
Read
Performing write using the register 40501 batch-
Read
clears the alarm history. Set any value as data.
Read
Read
Data Description Data
HC4 E.CDO HDA
HC5 E.IOH HDB
HC6 E.SER HDC
HC7 E.AIE HF1
HC8 E.USB HF2
HD0 E.OS HF3
HD1 E.OSD HF6
HD2 E.ECT HF7
HD3 E.OD HFB
HD5 E.MB1 HFD
HD6 E.MB2
HD7 E.MB3
HD8 E.MB4
HD9 E.MB5
Initial Value
1
Alarm data
Reply data
1
OFF
Turns off when normal data is received
Alarm data :
Remarks
Description
E.MB6
E.MB7
E.EP
E.1
E.2
E.3
E.6
E.7
E.11
E.13
0
Normal data
Reply data
2
OFF
ON
Data resulting in
communication error.
4
341