Chapter 7 Servo Parameters
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ASDA-A&A+ Series
7-94
Revision April 2009
Table 7.B Output Function Definition
Sign
Setting
Value
Digital Output Function Description
SRDY 01
Servo ready. SRDY is activated when the servo drive is ready to run. All fault and
alarm conditions, if present, have been cleared.
SON 02
Servo On. SON is activated when control power is applied the servo drive. The drive
may or may not be ready to run as a fault / alarm condition may exist.
Servo ON (SON) is “ON” with control power applied to the servo drive, there may be a
fault condition or not. The servo is not ready to run. Servo ready (SRDY) is “ON”
where the servo is ready to run, NO fault / alarm exists. (P2-51 should turn servo
ready SRDY off / on)
ZSPD 03
At Zero speed. ZSPD is activated when the drive senses the motor is equal to or
below the Zero Speed Range setting as defined in parameter P1-38. For Example, at
default ZSPD will be activated when the drive detects the motor rotating at speed at or
below 10 r/min. ZSPD will remain activated until the motor speed increases above 10
r/min.
TSPD 04
At Speed reached. TSPD is activated once the drive has detected the motor has
reached the Target Motor Speed setting as defined in parameter P1-39. TSPD will
remain activated until the motor speed drops below the Target Motor Speed.
TPOS 05
At Positioning completed.
When the drive is in Pt mode, TPOS will be activated when the position error is equal
and below the setting value of P1-54.
When the drive is in Pr mode, TPOS will be activated when the drive detects that the
position of the motor is in a –P1-54 to +P1-54 band of the target position.
For Example, at factory default TPOS will activate once the motor is in -99 pulses
range of the target position, then deactivate after it r99 pulses range of the
desired position.
TQL 06
At Torques limit. TQL is activated when the drive has detected that the motor has
reached the torques limits set by either the parameters P1-12 ~ P1-14 of via an
external analog voltage.
ALRM 07
Servo alarm (Servo fault) activated. ALRM is activated when the drive has detected a
fault condition.
(However, when Reverse limit error, Forward limit error, Emergency
stop, Serial communication error, and Undervoltage these fault occur, WARN is
activated first.)
BRKR 08
Electromagnetic brake control. BRKR is activated (Actuation of motor brake). (Please
refer to parameters P1-42 ~ P1-43)
HOME 09
Homing completed. HOME is activated when the servo drive has detected that the
“HOME” sensor (Digital Input 24) has been detected and the home conditions set in
parameters P1-47, P1-50, and P1-51 have been satisfied.
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