6.4
Variable Speed Operation
■ Variable speed operation
• When the operation command BFM #25 b12 is set to
1, the speed pulses specified in the BFMs (#20 and
#19) are generated.
• This operating speed can be freely changed even
while pulses are generated. However, because
there is no cushion start/stop function, acceleration
and deceleration must be controlled by the PC.
• Only b0 (error reset) and b12 (variable speed
operation) of the operation command BFM #25 are
valid in this mode. Set b1 to b11 to 0.
When b12 is set to 1, variable speed operation is
performed.
When b12 is set to 0, pulse output is stopped.
(The pulse output does not stop even if “0” is
written in BFM #20, #19.)
• As for the parameter BFM #3, only b1 and b0
(system of units) and b8 (pulse output format) are
valid.
• The rotation direction (forward or reverse) can be
specified by the sign (positive or negative) of the
speed command (BFMs #20 and #19).
• Do according to the undermentioned procedure
when you change the direction of the rotation.
① Turn OFF b12 of BFM #25.
② Change the value at drive speed (BFM #20, BFM
#19).
(The direction of the rotation is decided according
to the sign)
③ Again, turn ON b12 of BFM #25.
Velocity
V(I)
BFM #25 b12=1
V
bia
max
V
6
FX-1PG/FX
2N
-1PG PULSE GENERATOR UNIT OUTLINE OF OPERATION MODES
6-8
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