Mitsubishi Electric FR-A700 Technical Manual page 434

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1) [Pr. 343 Communication error count]
You can check the cumulative number of
communication errors by reading [Pr. 343]. 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.
Master
Slave
Communication
Error count
[Pr. 343]
Signal LF
(6) Modbus registers
System environment variable
Register
40002
Inverter reset
40003
Parameter clear
40004
All parameter clear
40006
Parameter clear
40007
All parameter clear
40009
Inverter status/control input instruction
40010
Operation mode/inverter setting
40014
Running frequency (RAM value)
40015
Running frequency (EEPROM value)
*1
The communication parameter values are not cleared.
*2
For write, set the data as a control input instruction. For read, data is read as an inverter operating status.
*3
For write, set data as the operation mode setting. For read, data is read as the operation mode status.
<Inverter status/control input instruction>
Bit
Control input instruction
0
Stop command
1
Forward rotation command
2
Reverse rotation command
3
RH (high speed command)
4
RM (middle speed command)
5
RL (low speed command)
6
JOG (Jog operation selection)
7
RT (second function selection)
8
AU (current input selection)
CS (selection of automatic restart
9
after instantaneous power failure)
10
MRS output stop
11
STOP (start self-holding)
12
RES (reset)
13
0
14
0
15
0
*1
The signal within parentheses is the default setting. Descriptions change according to the [Pr. 180 to Pr. 189 Input terminal
function selection].
Each assigned signal is valid or invalid depending on NET. (Refer to page 440)
*2
The signal within parentheses is the default setting. Descriptions change according to the [Pr. 190 to Pr. 196 Output terminal
function selection].
*3
These are not available for
*4
These are not available for
Alarm data
Alarm data
Not increased
0
OFF
ON
Communication error count is increased in
synchronization with leading edge of LF signal
Definition
*1
*1
Definition
RUN (inverter running)
*1
SU (up-to-frequency)
*1
*1
IPF (instantaneous power failure)
FU (frequency detection)
*1*3*4
*1
*1
*1*3*4
*1
*1*3*4
*1*4
.
E700
.
D700
2) Output signal LF alarm output (communication
error warnings)
During a communication error, the alarm signal
(LF signal) is output by open collector output.
Assign the used terminal with any of [Pr. 190 to Pr.
196 Output terminal function selection].
Normal data
Reply data
1
OFF
Turns OFF when normal data is received
Read/Write
Write
Write
Write
Write
Write
Read/write
*2
Read/write
*3
Read/write
Write
Inverter status
*2
Forward running
Reverse running
*2
OL (overload)
*2
*2*3*4
*2
ABC1 (fault)
*2
ABC2 (—)
*2*3*4
0
0
0
0
0
0
Fault occurrence
468
Alarm data
Normal data
ON
Alarm data :
Data resulting in
communication error.
Remarks
Any value can be written
Set H965A as a written value.
Set H99AA as a written value.
Set H5A96 as a written value.
Set HAA99 as a written value.
See below.
See below.
According to the [Pr. 37, Pr. 144] settings, the
frequency and selectable speed are in
1r/min increments.
<Operation mode/inverter setting>
Mode
Read Value
EXT
H0000
PU
H0001
EXT
H0002
JOG
PU
H0003
JOG
*4
NET
H0004
PU+
H0005
EXT
The restrictions depending on the operation
mode changes according to the computer
link specifications.
PARAMETER
Reply data
2
OFF
Written
Value
H0010
H0014

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