IAI America PCON-CFA - Manual (Page 154)

3. SCON-CA/CF
A
146
(2) Operation in the half direction mode
It is operated with the data set in the PLC's target position register, positioning band register, setup speed
register, acceleration/deceleration register and pressing current-limiting setup register.
z Example of operation (Pressing operation)
[1] Set the target position data in the target position register.
[2] Set the positioning band data in the positioning band register.
[3] Set the speed data to the speed resister.
[4] Set the acceleration/deceleration data to the acceleration/deceleration resister.
[5] Set the pressing current-limiting data in the pressing current-limiting value register.
[6] Turn “ON” the pressing setup (PUSH) signal.
[7] Specify the pressing direction using the pressing direction setup (DIR) signal. (refer to 3.6.7 (22))
[8] In the condition where the positioning completion (PEND) signal is turned “ON” or under movement
signal (MOVE) is turned “OFF”, turn “ON” the positioning command (DSTR) signal.
The data items set in Steps 1) through 5) are read in the controller at the startup (ON edge) of the
DSTR signal.
[9] After the DSTR signal is turned “ON”, the PEND signal is turned “OFF” after tdpf.
[10] After confirming that the PEND signal is turned “OFF” or the MOVE signal is turned “ON”, turn “OFF”
the DSTR signal. Do not change any value in each register until the DSTR signal has been turned
“OFF”.
[11] At the same time when the PEND signal is turned “OFF”, the MOVE signal is turned “ON”.
[12] The current position data is continuously updated.
[13] When the DSTR signal is turned “OFF” and the motor current reaches the current-limiting value set
in Step 5, the PEND signal is turned “ON”. (Completion of pressing operation)
Even when the positioning band set in Step 2 is reached, in the case that the current does not reach
the motor current-limiting value set in Step 5, the pressing and a miss (PSFL) signal is turned "ON”.
In this case, the PEND signal is not turned “ON” (Pressing and a Miss).
[14] After the PEND signal or PSFL signal is turned “ON”, turn “OFF” the PUSH signal.
z Example of operation (normal positioning operation)
For the general positioning operation, set the signal in Step 6 to “OFF”.
When the remaining travel distance becomes within the range of the positioning band set in the position
data, and the DSTR signal is turned “OFF”, the PEND signal is turned “ON”.