Mitsubishi Electric 700 Series, Instruction Manual

Page: 110 / 416

99
Frequency setting by external terminals
4
P
ARA
MET
E
RS
(1) Remote setting function
⋅
Use Pr. 59 to select whether to use the remote setting function or not and whether to use the frequency setting
storage function in the remote setting mode or not.
When
Pr. 59 setting is any of "1 to 3, 11 to 13" (remote setting function valid), the functions of the RH, RM and RL
signals are changed to acceleration (RH), deceleration (RM) and clear (RL).
⋅
When the remote function is used, the output frequency of the inverter can be compensated for as follows:
External operation ...Frequency set with RH and RM ope external operation frequency other than multi-
speed (PU operation frequency when
Pr.79
= "3" (external, PU combined)) and terminal 4
input
(When making analog input compensation, set "1" to
Pr. 28 Multi-speed input compensation
selection
.
When
Pr. 28
is set to "0" and acceleration/deceleration is made to reach the set frequency of
the analog voltage input (terminal 2 or terminal 4) by RH/RM, the auxiliary input by terminal 1
becomes invalid.)
PU operation............Frequency set by RH/RM operation + PU running frequency
⋅
By setting Pr. 59 = "11 to 13", the speed can be decelerated to the frequency lower than the main speed (set by the
external operation frequency (except multi-speed setting) or PU operation frequency) .
(2) Frequency setting storage
⋅
The frequency setting storage function stores the remotely-set frequency (frequency set by RH/RM operation) into
the memory (EEPROM). When power is switched OFF once, then ON, operation is resumed with the remotely set
frequency. (
Pr. 59 =1, 11)
<Frequency setting storage conditions>
⋅
The frequency when the start signal (STF or STR) turns OFF
⋅
Remotely-set frequency is stored every minute after turning OFF (ON) the RH (acceleration) and RM
(deceleration) signals together. (The frequency is overwritten if the latest frequency is different from the
previous frequency when comparing the two. The state of the RL signal does not affect writing.)
CAUTION
⋅
The range of frequency change by RH (acceleration) and RM
(deceleration) is 0 to maximum frequency ( Pr. 1 or Pr. 18 setting).
Note that the maximum value of set frequency is (main speed +
maximum frequency).
⋅
When the acceleration or deceleration signal switches ON, acceleration/deceleration time is as set in Pr. 44 Second acceleration/
deceleration time and Pr. 45 Second deceleration time . Note that when the time set in Pr. 7 or Pr. 8 is longer than the time set in Pr.
44 or Pr. 45 , the acceleration/deceleration time is as set in Pr. 7 or Pr. 8 . (when RT signal is OFF)
When the RT signal is ON, acceleration/deceleration is made in the time set to Pr. 44 Second acceleration/deceleration time and Pr.
45 Second deceleration time , regardless of the Pr. 7 or Pr. 8 setting.
⋅
Even if the start signal (STF or STR) is OFF, turning ON the acceleration (RH) or deceleration (RM) signal changes the preset
frequency.
⋅
When switching the start signal from ON to OFF, or changing frequency by the RH or RM signal frequently, set the frequency
setting value storage function (write to EEPROM) invalid ( Pr. 59 ="2, 3, 12, 13"). If set valid ( Pr. 59 ="1, 11"), frequency is written
to EEPROM frequently, and this will shorten the life of the EEPROM.
⋅
The RH, RM, RL signals can be assigned to the input terminal using any of Pr. 178 to Pr. 189 (input terminal function selection) .
Changing the terminal assignment using
Pr. 178 to Pr. 189 (input terminal function selection)
may affect the other functions. Set
parameters after confirming the function of each terminal.
⋅
This parameter can be also used for the Network operation mode.
0
ON
ON
ON
Main speed
Output frequency
(Hz)
Minimum frequency
Forward rotation (STF)
Acceleration (RH)
Deceleration (RM)
Time
When
Pr. 59
= 1, 2, 3
Decelerates to the main speed
When
Pr. 59
= 11, 12, 13
Decelerates to the minimum frequency
Deceleration(RM)
Acceleration(RH)
Forward rotation(STF)
0Hz
ON
Time
(Hz)
Main speed setting
Pr.1
The set frequency is clamped at (main speed +
Pr.1
)
Output frequency is
clamped at
Pr.1
Set frequency
Output frequency
ON
ON
When
Pr.59
= 1, 2, 3
When
Pr.59
= 11, 12, 13