Panasonic GM1 Series Reference Manual page 6

JOG positioning operation
This refers to an operation to transfer a unlimited feed operation to a positioning operation by
an input from the external switch.
Positioning control start input (Timing input)
This is a JOG positioning operation input to transfer a JOG operation to a positioning
operation. The pulse count settings can be output after the external switch input.
Over limit input (+), over limit input (-)
This is a limit switch input that is used to limit the motor movement. Over limit input (+) is the
limit point on the side where the elapsed value increases and over limit input (-) is the limit
point on the side where the elapsed value decreases.
Home return (Home search)
The reference position for positioning is called a Home position and an operation to travel to a
Home position is called Home return. Each axis is moved to the preset home position and the
coordinates of the home position are defined as absolute position zero. Home search
automatically reverses the motor rotation when Over limit input (+) or Over limit input (-) is
input and searches the home position or the near home position to return to the home position
automatically.
Forced stop
This is a function that interrupts the operation in progress, and stops it immediately. It is used
to initiate an emergency stop using an external switch.
Twisted pair cable
This refers to a cable constructed of two wires, which suppresses the effects of noise. As the
current of the same size flows in the opposite direction between the two, noise is blanked out,
which reduces the effects of the noise.
Home input
This refers to input of the reference position used for positioning, and is connected to the Z
phase signal of the servo amplifier, or to an external input switch and sensor.
Near home input
In order to stop the table at the home position, a position at which deceleration begins is called
the near home position. This is connected to an external input switch or sensor.
Input valid logic
Depending on the type of sensor and switch connected to the home input and near home
input, it is necessary to confirm whether the input signal will be valid when current is flowing,
or whether input will be valid when no current is flowing. This is called the "input valid logic".
Deviation counter
This is located inside the servo amplifier, and counts the difference between command pulses
and the feedback from the encoder. Command pulses are counted as plus values and
feedback pulses are counted as negative values, with control being initiated so that the
difference between them is zero.
Deviation counter clear signal
This is output from the pulse output unit, and goes on when a home position return is
completed, to notify the driver that the table has arrived at the home position.
Pulser operation
A manual operation is available using a device (pulser) which generates pulses manually. The
same type of output as that from the encoder can be obtained.
Transfer multiple
With the pulse output unit, this can be specified when the "pulser input operation " is used.
Outputting the number of pulses doubled by the number of pulser input signals, the transfer
multiple is said to be "2", and when the number of pulses is five times that of the pulser input
signals, the transfer multiple is said to be "5".
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