Details Of Signals; Nc Power On And Servo Power On; Emergency Stop Input; External Power On/Off - YASKAWA YASNAC J50 Connecting Manual

10.3 DETAILS OF SIGNALS
10.3.1 NC POWER ON
(NCMX)
AND SERVO POWER
ON
(SVMX)
(1)
NCMX: This output is turned ON when the logic circuit of the
control is energized.
(2) SVMX: This output is turned ON when the servo unit is
energized. With an external servo unit, turn ON the power
supply when this signal is outputted.
(3) The power supply turning ON sequence is as follows:
(a) Close the power supply main switch for the control.
(b) Either push the POWER ON button on the CNC operator's
panel, or close the circuit between EON and ECM. Then, the
logic circuit and the servo control circuit are both energized,
and the circuit between NCMX (NC power input and output) is
closed.
:
With an external servo unit, design the servo control
circuit power input sequence so that the circuit is
energized at the output of NCMX signals.
:
(c) Again make the same power switching (pushing the POWER
ON button or closing the circuit between EON and ECM).
Now, the servo power supply is turned ON, and the circuit
between SVMX (servo power input and output) is closed.
:
With an external servo unit, design the servo power
circuit power input sequence so that the circuit is
energized at the output of SVMX signals.
:
(d) When the external circuit is ready after the circuit between
SVMX is closed, and the control becomes ready, close the
MRD (machine ready) input of the 1/0 module. Then, RDY is
displayed on the CRT, and operation becomes possible.
POW;: ON n
n
NCMX
(OUTPUT)
SVMX
(OUTPUT)
MRD
(INPUT)
\
I
10.3.2 EMERGENCY STOP (TESP) INPUT
When the circuit between emergency stop input terminals (TESP) is
open, the control stops totally the servo power supply is turned off,
and the emergency stop output (* ESPS) of general purpose 1/0
module is opened.
10.3.3
EXTERNAL POWER ON-OFF (EON, EOF,
ECM) INPUT
The control can be switched on and off by external input signals, in
the same way as the depressing of the POWER ON/OFF buttons on
the CNC operator's panel. When the circuit between EON and
ECM is closed, the logic circuit or servo power of the control is
energized. When the circuit between EOF and ECM is opened, the
logic circuit or servo power of the control is deenergized.
=L : -
CONTROL SERVO
POWER SUPPLY
Fig. 10.5 External Power ON-OFF
10.3.4
OVERLOAD (*TOLD) INPUT
Short-circuit T24(CN11- 16) if this input is not used. (Normally
this input is not used.)
+
, i_
:~p~:tEEN
:;;FW:;EEN ;YSCCYREEN
ALARM CODE ALARM CODE '"ROY" DISPtAY
"31 o"
"280
Fig. 10.4 Time Chart of Power Supply
Turning on Sequence