IAI America SCON-CA - Manual (Page 198)

Chapter 7
Absolute Reset and
Absolute Battery
188
[2] Absolute reset using PIO
1) Check the servo-on status SV is OFF.
2) Turn the servo-on Input SON OFF for 100ms or longer.
(Turn the SV and SON signals OFF and continue this status for 100ms or longer.)
3) Turn the home return signal HOME (ST0 signal in case of PIO pattern 5) from OFF to ON.
(Processed with ON edge.)
4) Turn the reset signal RES from OFF to ON. (Processed with ON edge.)
5) Check that the alarm signal *ALM is ON (controller’s alarm (Note 1) is cancelled).
(Note 1) If the cause of the alarm is not removed, an alarm will be present again (*ALM
signal OFF). Check the condition including other alarm causes.
6) Turn the home return signal HOME (ST0 signal in case of PIO pattern 5) and reset signals
RES OFF.
7) Turn the servo-on signal SON ON.
8) Wait until the servo-on status SV turns ON.
9) Turn the home return signal HOME (ST0 signal in case of PIO pattern 5) ON (with ON
edge). The home return operation is started.
10) When the homing completion signal HEND is turned ON (completion of home return),
absolute reset is completed.
[Timing]
Alarm Signal (*ALM)
Servo ON Status (SV)
Homing Completion Signal (HEND)
Servo-on Signal (SON)
Home Return Signal
(HOME (ST0))
Alarm reset (RES)
100ms or more
Alarm Reset Command
Waiting for servo ON
Home return command
Home Return Completion
(Absolute Reset Complete)
Signal from PLC to SCON-CA
Signal from SCON-CA to PLC