Forward/Reverse Drive Stop Function (Fot/Rot); Position Range Specification Function; Teaching Function - Hitachi SJ700D-004L Instruction Manual

Chapter 4

4.3.17 Forward/reverse drive stop function (FOT/ROT)

- The forward/reverse drive stop function allows you to prevent motor
operation from deviating from the specified control range according to signals
from the control range limit switches.
- When the FOT terminal is turned on, the torque for forward rotation is limited to 10%. When the ROT terminal is
turned on, the torque for reverse rotation is limited to 10%. This function can be used as a limit switch function at the
machine end. This function is activated by setting 71 (FOT) and 72 (ROT) on intelligent input terminals 1-8 (C001- C008

4.3.18 Position range specification function

- The position control ranges for forward and reverse rotations can be
specified by the position range specification (forward) (P072) and position
range specification (reverse) (P073), respectively. If the value of the current
position counter exceeds one of these ranges, a position control range
error (E63.* or E73.*) causes the inverter to trip and enter free-running
status.
- The values specified by P072 and P073 limit the maximum values of multistage position settings 0 to 7 (P060 to
P067).
(Position settings cannot exceed the specified position ranges.)

4.3.19 Teaching function

- The teaching function allows you to make the inverter run and stop the
motor arbitrarily, and then store position data as a position command in an
arbitrary position command area of memory.
- Assign function "45" (ORT) to an intelligent input terminal 1-8 (C001-C008).
The ORT terminal functions as the teaching terminal when "02" (absolute position control) or "03" (high-resolution
absolute position control) is specified for the control pulse setting (P012).
<Teaching procedure>
<1> Select the position command to be set by teaching selection (P074).
<2> Move the workpiece.
- Enter an operation command with the ORT terminal turned on. The speed and acceleration/deceleration settings
selected at operation command input are applied.
ORT terminal
Operation command
Output
frequency
* Teaching operation can be performed when power is input to the power supply terminals (R0 and T0) of the inverter control
circuit.
The current position counter also operates when an external device moves the workpiece. Therefore, teaching operation can also
be performed when the inverter does not operate the machine.
Note: In the case above, make sure that the power supply to the power terminals (R, S, and T) of the inverter power circuit or
inverter output (U, V, and W) is disconnected from the motor. Performing teaching operation with the power supply and inverter
output connected may result in personal injury or damage to equipment.
<3> Press the STR key on the digital operator when the target position
(Be sure to press when data is displayed (in case
is reached.
remote operator SRW-OJ, SRW-OEX is used, cursor is on the
data value and PRG LED is on)
<4> The current position data is set in the memory area
corresponding to the position command specified by the teaching
(P074 itself is not stored. After power off or
selection (P074).
reset, 00 (X00) is set.)
ON
ON
Setting of P074
4-110
Explanation of Functions
Related code
C001-C008 intelligent input terminals
Related code
P072: Position range specification (forward)
P073: Position range specification (reverse)
Related code
C001-C008 intelligent input terminals
P012: Control pulse setting
P013: Home search stop position setting
The speed setting selected at operation
command input is applied.
Position
Position command to be set
00 P060: Multistage position setting 0
01 P061: Multistage position setting 1
02 P062: Multistage position setting 2
03 P063: Multistage position setting 3
04 P064: Multistage position setting 4
05 P065: Multistage position setting 5
06 P066: Multistage position setting 6
07 P067: Multistage position setting 7