JOG EXCITE: Service & Maintenance Manual - rev. 1.1
Page 3.11
3.4.
EMERGENCY STOP MANAGEMENT
3.4.1.
C
ONTROL
The control block diagram is as follows:
When the user presses the emergency button, the display board stops the exercise, displays the
message “PRESS ANY KEY …” and sends to the AT driver the Emergency signal and the
commands for halting the motors over the 485 serial link. When the AT driver receives these
signals, it stops driving both the tread belt and elevation motors.
ATTENTION: the “PRESS ANY KEY…” message is displayed even in case the serial
communication between the upper assembly and the lower assembly is lost.
If the AT driver receives the emergency only via the serial link and not via the Emergency signal,
locks out with error code “EM” and the machine displays the error message “HW EMERGENCY
ERROR”.
Once the AT driver has received an alarm signal, even if the emergency reverts to the non-tripped
state, the alarm condition will persist until the display board sends the reset signal resulting from
any key being pressed. This forces the AT driver to reinstate the serial communication to the
display board and after that to redo the reset procedure.
If the serial communication fails, the machine will try several time to reinstate it. Each attempt is
recorded increasing the value of the COM.FAUL counter that can be checked as indicated at
paragraph 9.2.4.3 “COM.Fault”. After about 30 seconds it will interrupt and will display the error
message “THE EQUIPMENT IS BLOCKED”.
Display Board
Emergency
7-1/CN7
Emergency
Key
Keyboard
Contact
1-2/CN8
Reset
8-1/CN7
RS-485
AT driver
9-2/J3
10-2/J3
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