LINK Systems OmniLink II Press Automation Control - Manual (Page 86)

August 30, 2002 Manual Version 1.0 5.3
The central portion of the display provides the following information:
1.
A brake monitor used when the press stops at the top of the stroke.
2.
A brake monitor used when the press stops at any position other than top.
3.
The actual last stopping time of the press, measured by the brake monitor, and stop time limits
that can be independently set for top stops and stops at any position other then stop.
4.
Clutch engagement time monitor with preset limit and actual measured clutch engagement time.
5.
A Critical (Stop) Angle which may be set for each job for use with the intellistop function of die
protection and process monitoring. This is the only setting (made in Program Mode) on this
screen.
6.
Stopping Degrees – the number of degrees traveled during the last stop of press stroking
7.
Messages from auxiliary equipment if this option is used.
8.
Reason for the Last Stop. A diagnostic message that indicates the last event that caused the press
to stop stroking.
9.
Present Running Status. Diagnostic messages that indicate any event or condition that is keeping
the press from stroking.
Section 5.2.1 Brake Monitor
The OmniLink II Press Automation Control incorporates a control reliable brake monitor that measures
stopping time and stopping angle every time the press stops, regardless of stopping position. Separate
stop time limits are provided for top stops and stops at positions other than top (mid-stroke). This is
because stopping time usually varies with stopping position, with worst case stopping time usually
occurring at mid downstroke. The separate top stop and mid-stroke limits allow relatively tight limits to
be set for top stop time without causing nuisance brake monitor alarms when longer mid-stroke stopping
occurs. Since the system knows whether the slide top stops, or stops elsewhere in the stroke, it
automatically displays the stopping time as a top stopping time or a mid-stroke stopping time and
compares it to the top stop or mid-stroke limit as appropriate.
The stop time limits for both top stop and mid-stroke stopping are set in the Machine Parameters
configuration menu as described in Section 4.2.1.8 of this manual. The settings may be made with
2msec resolution.
If the actual stop time at either top stop or mid-stroke stop exceeds its preset limit, the Present Running
Status diagnostic message will read “Brake Monitor Alarm” highlighted in red, and the actual stop time
shown by the brake monitor display will also be highlighted in red. Further stroking will be prevented
until the brake monitor is reset.