11 - 2
MELSEC-A
11 MANUAL CONTROL
11.1 Outline of manual control
11.1.1 Two manual control methods
"Manual control" refers to control in which positioning data is not used, and a
positioning operation is carried out in response to signal input from an external source.
The two types of this "manual control" are explained below.
(1) JOG operation
"JOG operation" is a control method in which the machine is moved by only a
movement amount (movement continues while the JOG START signal is ON).
This operation is used to move the workpiece in the direction in which the limit
signal is ON, when the operation is stopped by turning the limit signal OFF to
confirm the positioning system connection and obtain the positioning data
address (refer to section "12.7.4 Teaching function").
M
Movement continues while
the JOG START signal is ON.
JOG START signal
ON
OFF
Fig. 11.1 JOG operation
(2) Manual pulse generator operation
"Manual pulse generator operation" is a control method in which positioning is
carried out in response to the No. of pulses input from a manual pulse generator.
This operation is used for manual fine adjustment, etc., when carrying out
accurate positioning to obtain the positioning address.
M
Movement in response to the
position/speed commands
AD75
Position/speed
commands
Manual pulse generator
Pulse input
Fig. 11.2 Manual pulse generator control
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