9. CONNECTION TO SERVO OR SPINDLE
Specification Unit Supplement
High level input voltage VH 3.6 to 10.5 V (NOTE)
Low level input voltage VL 0 to 1.0 V
+1.5 max mA Vin= 5V
High level input current Iih
+8.8 max mA Vin=10V
Low level input current Iil –8.0 max mA Vib= 0V
The plus sign (+) of Iih and Iil represents the direction of flow into the
receiver, while the minus sign (–) represents the direction of flow from
The input release state is also assumed to be the high level.
4 *PRDY (output)
*PRDY is the ready signal, issued by the Power Mate to the servo
amplifier. The electrical characteristics of this signal are the same as
those of *ENBL.
5 *VRDY (input)
*VRDY is the ready signal issued by the servo amplifier. When the
power to the servo amplifier is turned on to set the normal startup state,
and the *PRDY signal from the Power Mate is subsequently turned on,
the servo amplifier must immediately turn on (short–circuit) the
*VRDY signal. If the servo amplifier encounters an error, the *VRDY
signal must be turned off (released) to report the error to the Power
Mate. If this signal is not used, connect *VRDY and 0V to each other
(low level), and set bit 1 (CVR) of parameter No. 1800 to 1.
If the servo amplifier encounters an error, stop the motor regardless of
the state of the VCMD signal.
The electrical characteristics of this signal are the same as those of
7 A, *A, B, *B, Z, *Z
These signals are received from the pulse coder.
D A–phase and B–phase signals (A, *A, B, *B)
The A–phase and B–phase signals are shifted by 90 degrees
relative to each other, and are used to transfer incremental position
information. A position is detected, assuming that the direction of
movement is positive while the B–phase signal is advanced, or that
the direction of movement is negative while the A–phase signal is