IAI America ERC3 - Manual (Page 21)

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17. When using Pulse Train Control type, pay close attention to the pulse
frequency; so the frequency will no exceed the actuator specification.
In the pulse train control, the acceleration/deceleration speed is also controlled by the change
of the command pulse frequency from the host controller. Be careful not to exceed the
maximum acceleration/deceleration speed of the actuator. The use of the actuator with
excessive acceleration/deceleration rate may cause a malfunction.
18. For CON Mode Type, an operation cannot be made unless the servo-on signal
and pause signal are input.
(1) Servo ON Signal SON
Servo-on signal SON is selectable from either “Enable” or “Disable” by the parameter.
This setting can be performed in Parameter No.21 “Servo ON input disable selection”.
[Refer to Chapter 7 Parameters.]
If it is set to “Enable”, the actuator would not operate unless turning this signal ON.
If parameter No.21 is set to “1”, SON is made disable. If it is set to “Disable”, the servo
becomes ON and the actuator operation becomes enabled as soon as the power supply to
the controller is turned ON and the emergency stop signal is cancelled.
The factory setting is “0” (Enable). Have the setting that suits the desired control logic.

(2) Pause Signal *STP
The input signal of the pause signal *STP is always ON considering the safety. Therefore,
in general, the actuator would not operate if this signal is not ON.
It is available to make this signal to “Disable”, if this signal is undesirable.
It is settable by parameter No.15 “Pause input disable”.
[Refer to Chapter 7 Parameters.]
If parameter No.15 is set to “1” (Disable), the actuator can operate even if this signal is not
ON.
This parameter is set to “0” (Enable) at delivery.