IAI America ERC3 - Manual (Page 257)

Chapter 4 Operation
4.3
Operation in Pulse
Train Control Mode (How to Operate
Pulse
Train Control
Type)
247
[5] Time Constant for Control Signal Input
The input signals of this controller incorporate an input time constant to prevent malfunction
due to chattering, noise, etc. Make sure to input the signals continuously for 6ms or more.
(Note) Command pulse train inputs (PP•/PP, NP•/NP) do not have input time constants. Also, it
is necessary to input 16ms or more for CSTP Signal.
[6] Operation Ready and Auxiliary Signals
(1) Servo ON (SON, SV, INP)
Input Output
PIO signal
SON SV INP
1) Servo ON signal SON is the input signal making the servo motor of the actuator operable.
2) If the servo-on is performed to enable operation, the SV output signal is turned ON.
Concurrently positioning completion signal INP is turned ON.
3) With the power being supplied, then controller cannot be operated while the SV signal
remains OFF. If the SON signal is turned OFF under operation of the actuator, the actuator
is decelerated and stopped with the maximam torque. After the stop, the servo OFF occurs
to enter the motor into the free running state.
If the actuator is equipped with a brake, the brake gets in the operational condition. The
brake (option) is of release-in-excitation type. Therefore, making the servo ON will release
the brake while making it OFF will lock the brake.
If the deviation clear is set to valid (setting: 0, setting at delivery: 1 = invalid) in Parameter
No.58 at this time, the deviation counter gets reset.
z Servo OFF status
1. Once the actuator stops, no retaining torque will be supplied.
2. The pulse train input, HOME (home return signal), TL (torque-limiting selection signal)
and CSTP (external forced stop signal) are all ignored.
3. Output signals SV (ready signal), HEND (home return complete signal) and TLR (torque
limiting signal) are all cleared (turned OFF).
4. INP (Positioning Completion Signal)
The INP (Positioning Completion Signal) is OFF when the servo is OFF.
Identify
Does not identify
Input Signal
Input Signal
6ms