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7.1. General Operation and Function
7.1.13. Definition of Home Position (HCMP)
7.1.13. Definition of Home Position (HCMP)
l This is a control signal to inform externally that the home position is defined.
l The HCMP output closes when the home position is defined with Home Return, etc.
l The System corresponding to absolute position sensor closes the HCMP output as soon as the
DRDY signal outputs after the power is turned on.
l The HCMP output closes if Home Return is interrupted, or parameters to set the coordinate
system (DI or PS) are changed even the home position has been defined.
n Refer to “6.2.1.2. Definition of Home Position by Home Return” for sequential timing.
7.1.14. Velocity Threshold (SPD)
l This is a control signal to report velocity of the Motor.
l The SPD output closes if velocity is over (over speed) or lower (zero speed) than the threshold
set by the parameter SB
l The parameter SO selects “over speed mode” or “zero speed mode.”
l The parameter ST checks state of stability of velocity against the threshold.
(The SPD output closes when the state of velocity is in the threshold for a time set by the
parameter ST.)
Figure 7-16: Sequential timing of SPD output
Closed
Open
Zero velocity
mode (SO0)
Motor velocity
Threshold
SB
0
SPD output
Closed
Open
Over speed
mode (SO1)
ST set time
ST set time
ST set time
ST set time
l For the B3 and 23 Driver Units, the SPD output has the following restrictions.
à In case of I/O combination type is besides TY8, the output signal is valid when the
output port setting parameter is OM1.
à In case of I/O combination type is TY8, the output signal is valid when the parameters
are BF0 and OM1.
à It cannot be used with the outputs of BRK/BRKC, NEARA and OVER.
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