Mitsubishi Electric FR-A700 Technical Manual page 321

(6) Pulse train output of terminal FM [Pr. 291
(*Available for only
common
Two types of pulse train can be selected for terminal
FM of according to the [Pr. 291] setting. Using
A700
[Pr. 291], input specifications (pulse train input or
contact input) of terminal JOG can be selected.
Change the setting value using care not to change
input specifications of terminal JOG. (Refer to page
228 for pulse train input.)
For
F700 E700 D700
output at terminal FM. (High speed pulse train can
not be output.)
1) FM output
common
When [Pr. 291 Pulse train I/O selection = 0 or 1] on
and using
A700
output is selected and pulse train of 8VDC
maximum, 2400pulse/s is output.
The pulse width can be adjusted by calibration
parameter [C0 (Pr. 900) FM terminal calibration]
using the operation panel and parameter unit.
Output frequency, etc. of the inverter can be
commanded by connecting a DC ammeter of full-
scale deflection, digital indicator, etc. The initial
setting is 1mA full-scale and 1440 pulse/s terminal
FM frequency at 60Hz.
FM output circuit
Inverter
24V
*
2.2K
3.3K
FM
20K
SD
Pulse width T1: Adjust using calibration parameter [C0]
Pulse cycle T2: Set with [Pr. 55] (frequency monitor)
Set with [Pr. 56] (current monitor)
* 4.7K in
E700 D700
2) High speed pulse train output
When [Pr. 291 Pulse train I/O selection = 10, 11, 20,
21, 100] on
A700
output by open collector output. Maximum 55k
pulse/s of pulse train is output.
Two types of pulse width, 50% Duty and fixed ON
width, are available. Adjustment by calibration
parameter [C0 (Pr. 900) FM terminal calibration]
can not be performed.
* ]
.)
A700
, only FM output can be
, FM
F700 E700 D700
T1
DC8V
T2
A700
, high speed pulse train is
High speed pulse train output circuit
(connection example with a pulse counter)
Inverter
* When the output wiring length is long, a pulse shape is
deformed due to the stray capacitances of the wiring and
output pulse can not be recognized. If the wiring length is
long, connect the open collector output signal and the
power supply using an external pull up resistance.
Check specifications of a pulse counter for a resistance
value to pull up. Select an appropriate resistance value so
that the load current is 80mA or less.
High speed pulse train output specifications
Item
Output method
Voltage between a
collector and emitter
Maximum permissible
load current
Output pulse rate
Output resolution
* The output pulse rate is 50kpps when a monitor
output value is 100%.
When [Pr. 291 = 10, 11], pulse cycle is 50% Duty
(ON width and OFF width are the same).
When [Pr. 291 = 20, 21, 100], fixed ON width of
pulse is output (approx. 10µs).
When the setting value is 100, the pulse train from
the pulse train input (terminal JOG) is output as is.
Use this value for synchronous speed operation of
multiple inverters. (Refer to page 567)
Pulse when [Pr. 291 = 10, 11]
50 Duty
Hi
Pulse when [Pr. 291 = 20, 21, 100]
About 10 s
Hi*
* Hi indicates that the open collector output
transistor is OFF.
When high speed pulse train output is selected,
performing all parameter clear will return the [Pr.
291] setting to the initial value 0, changing the
terminal FM output from high speed pulse train
output to FM output (voltage output).
Disconnect the device connected to terminal FM
and perform all parameter clear.
355
PARAMETER
Pulse counter
Pull up resistance *
FM
SD
Specifications
NPN open collector output
30V (max)
80mA
0 to 55kpps
*
3pps (excluding a jitter)
50 Duty
Low
About 10 s
Low
2