JOG NOW : Service & maintenance manual - rev. 6.2
Page 3.26
The two micro switch connected in series, act for a double safety device because if one is
damaged the others will stop the machine.
ATTENTION: The message “Reposition the emergency stop device and touch the screen”
appears on the display also if the serial communication between the high and low kit is
interrupted.
Pressing a key initiates the procedure for reinstating operation of the Drive, which receives a reset
signal from the CPU board. After this, the Drive attempts to re-establish serial communications with
the Display, and then repeats the reset procedure again.
If serial communication cannot be established, the machine will make a number of attempts. Each
failed connection attempt is recorded in the COM FAULT parameter, which can be viewed as
described in relevant paragraph: of the Service menu. After approximately 30 seconds, it stops and
displays the error message “MACHINE BLOCKED (COM)”.
3.24.1.2.
The signals involved
The machine uses the following control signals:
Emergency contact:
This is the NC contact provided by the 2 micro switch actuated when the emergency stop button
is pressed. This contact becomes open when the emergency stop device is detached.
The signal enters the CPU Board through connector CN22
(pins 1 and 2)
.
RS-485 Signal:
This is a digital signal exchanged between the Drive and the CPU board.
Emergency signal:
This is the signal generated by the CPU board (
pins 1 and 4 of connector CN17
) and sent to the
Drive (
J3A)
.
This signal is 0Vdc under normal conditions, and goes to 11.9 Vdc in the emergency condition.
Reset signal:
This is the signal generated by the CPU board (
pins 1 and 10 of connector CN17
) and sent to the
Drive
(J3A)
to signal to the low kit that normal operation has been reinstated after an emergency
condition. This signal is 0Vdc under normal conditions and goes to approximately 8Vdc for a
few seconds when the user presses a key.
When this happens, the CPU Board resets the Emergency signal to 0 Vdc, thus allowing the Drive
to return to the normal operating condition.
Summary of Contents for Jog Now Excite+ 700
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