IAI PCON-CB series, Instruction Manual

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Chapter 3 Operation
POWER CON
PCON-CB/LC
128
3.2.6 Direct Position Specification (Solenoid Valve Mode 2) = Operation of
PIO Pattern 5
The start signal is provided for every position number. Only turning ON the relevant input signal
according to the table shown below allows the operation based on the data in the target
position number to be performed. The operation mode is called the solenoid valve mode
because solenoid valves can directly drive air cylinders. At invasion of the actuator into the
positioning width set for each position, the output signal is turned ON in the operation of any
position number or manual operation of the actuator in servo OFF status as if a sensor were
installed.
Positioning and speed change during operation are possible. Their control methods are the
same as those of other patterns.
Caution: This pattern does not allow pressing and pitch feed.
[1] Home Return (ST0, HEND)
The I/O of PIO varies as shown in the table below depending on the position number before
home return.
Position No. Input Output
0 ST0
(Note 1)
LS0
1
ST1 ⇒ JOG+ LS1 ⇒ TRQS
2
ST2 ⇒ Invalid LS2 ⇒ Invalid
Before home return, start signal ST1 works as JOG+. By using this function, move the actuator
to a position at which home return can be done safely. The speed of JOG+ is the home return
speed. (TRQS should be output when the actuator hits an obstacle or the stroke end and become
unable to move and the current of the motor exceeds the home-return current limit value.)
After the home return is fully prepared, turn the ST0 signal ON to start the home return. At the
completion of the home return, home return complete signal HEND is turned ON. Turn the ST0
signal OFF if HEND is turned ON. HEND remains ON unless the home is lost due to
occurrence of an alarm.
If a certain home positioning is required, Set “Position” of position No.0 to 0 mm and the ST0
signal is not changed by the HEND signal to remain ON. After the home return is completed,
positioning is provided for position No.0. [Refer to 3.2.6 [3] Positioning.]
Note 1 Regarding Start Signal ST0 before Home-Return Operation
• When Parameter No. 27 “Move command type” Set to “0 (factory setting)”
The actuator moves to the home direction while ST0 Signal is ON and stops when
ST0 Signal turns OFF. Once it reaches the mechanical end with ST0 Signal ON, the
home-return operation will be performed.
• When Parameter No. 27 “Move command type” Set to “1”
The home-return operation starts at the same time as ST0 Signal turns ON.
Operation will not stop even if ST0 Signal turns OFF.
Caution: If “Position” in position No.0 is set to other than 0mm, the operation is
continued without change to provide positioning.
Home return signal
ST0
(PLC → Controller)
If a certain precision is required, Set
"Position" of position No.0 to 0mm and
ST0 is not chaged by HEND to remain ON.
Homing Completion Signal
HEND
(Controller → PLC)