IAI America ERC2 - Manual (Page 149)

8. Parameter Settings
126
z Automatic servo-off delay time
This parameter defines the delay time after the positioning is completed until the servo turns off automatically, when
the “Standstill mode” field of the position table is set to 1, 2 or 3 (automatic servo-off control enabled) or parameter No.
53 (Default standstill mode) is set to 1, 2 or 3 (automatic servo-off control enabled).
Meaning of settings: 1: T becomes the value set in parameter No. 36.
2: T becomes the value set in parameter No. 37.
3: T becomes the value set in parameter No. 38.
The default setting is “0 [sec].”
z Default standstill mode
This parameter defines the power-saving mode to be applied when the actuator stands by for a long time while the
servo is on after the power has been turned on, or when the actuator stands by for a long time after completing the
home return effected by the HOME input signal.
Define whether or not to enable power-saving, and which mode to use if power-saving is enabled, in parameter No. 53.
Setting
All power-saving modes are disabled. 0
Automatic servo-off mode. The delay time is defined by parameter No. 36. 1
Automatic servo-off mode. The delay time is defined by parameter No. 37. 2
Automatic servo-off mode. The delay time is defined by parameter No. 38. 3
Full servo control mode 4
The factory setting is “0: [Disable].”
Automatic servo-off mode
After positioning is completed, the servo will turn off upon elapse of a specified time.
(Since no holding current flows, the power consumption decreases.)
When the PLC issues the next movement command, the servo will turn on and the actuator will start moving.
Refer to the above timing chart.
Full servo control mode
The pulse motor is servo-controlled to reduce the holding current.
Although the exact degree of current reduction varies depending on the actuator model, load condition, etc., the
holding current decreases to approx. one-half to one-fourth.
Since the servo remains on, no position deviation occurs.
The actual holding current can be checked in the current monitor screen of the PC software.
Movement
command
Servo status
Actuator
operation
Servo on
Target position
Automatic servo-off mode
(the green LED blinks)
T: Delay time after the positioning is
completed until the servo turns off (sec).