
B-65395EN/01 HANDLING 5.EXTERNAL PULSE INPUT FUNCTION
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5.2 DETAILED DESCRIPTION
Pulse
input
Servo
amplifier
module
CMR
ratioMachine
(1) Input external pulses to connector JA34. The A-phase (PA, *PA)
and B-phase (PB, *PB) signals are used for an input waveform as
well as for a position coder output waveform. The C-phase signal
is not required.
(2) The ratio of the amount of travel along an axis to an external pulse
can be set with parameters. The ratio is expressed as M/N (where,
M = parameter magnification 1 (parameter No. 0062), N =
parameter magnification 2 (parameter No. 0063)).
(3) When the A-phase signal is 90° ahead of the B-phase signal,
movement is performed in the positive direction.
When the A-phase signal lags 90° behind the B-phase signal,
movement is performed in the negative direction.
(4) Parameter setting (bit 6 (EXPLS) of parameter No. 0003)
determines whether to enable axis movement by external pulses.
(5) For axis movement by external pulses, interlock and overtravel
detection are valid.
(6) The acceleration/deceleration type used for axis movement by
external pulses is the same as that for jog feed. (Set bit 1 (JOGE) of
parameter No. 0002.)
(7) Select manual handle mode. This mode is selected when signal
output is performed from the host to a servo amplifier module
(MD1 = 0, MD2 = 0, MD4 = 1 [2.3.4 (1)].
(8) If the feedrate for axis movement by external pulses exceeds the
upper limit for a specified feedrate, as set in parameter No. 43, a
choice of the following responses can be made by parameter
setting (bit 6 (EPEXA) and bit 7 (EPEXB) of parameter No.
0001):
(a) The feedrate is clamped to the upper limit, and the excess
pulses are accumulated.
If the number of accumulated pulses exceeds 99999999, the
excess pulses are discarded.
(b) The feedrate is clamped to the upper limit, and the excess
pulses are discarded.
(c) Alarm 291 is issued, and movement is decelerated and
stopped.
NOTE
This function does not operate unless the motor has been
activated. When this function is used, therefore,
clamping/unclamping using the unclamp command signal
(UCPC2) and the clamp/unclamp state output signal (UCPS2)
(when bit 1 (NCLP of parameter No. 003 is "0") cannot be used.
Perform clamping/unclamping, using the servo off signal (SVFX).