Doc #: L-2600-1023 Page 39 Rev. 02
3.3.4.2 Bypassed
Each individual channel can be bypassed. When a channel is bypassed, it no longer monitors its input
sensor. It will not send a stop signal to the press control if the input sensor fails to meet the
requirements of the selected channel type.
When a channel is bypassed, its state on the die protection main screen will be displayed with a yellow
background and its “Ch. Status” will show “Bypassed” in the detailed information area. In addition, the
“Module Status” will display “One or More Channels Bypassed” highlighted in yellow.
3.3.4.3 Delay Time
This parameter is used by the “Static” and “Transfer” channel types only. This is the time that the
system will delay after the detection of a channel fault until a stop signal is issued. If the channel
remains in the fault condition for the length of the delay time, a fault will be issued. If the channel
returns to a run condition before the full length of the delay time, a fault will not be issued. The
maximum value of this delay time is 65535 milliseconds (65.535 seconds). If a delay time is not
required, this parameter should be set to 0.
3.3.4.4 Delay Strokes
This parameter is used by the “Cyclic” channel type only. This is the number of strokes that can be
made without satisfying the channel logic before a stop is asserted. This purpose of this delay is to
accommodate events that may not occur on every stroke, but will occur within some number of strokes.
An example of such an application is slug detection, where under normal conditions slugs will build up
and then fall out maybe two or three at a time. The delay counter allows the operator to enter a number
representing the maximum number of strokes that can be run consecutively without the slug being
detected within the timing window. If the sensor does not become active within the window for a
number of strokes exceeding the counter number, then a fault will be generated. By contrast, if the
sensor does become active within the window on some stroke before the counter expires, then the
counter is reset and the full count is again allowed. If the operator desires that the sensor be required to
become active on every stroke, then a value of zero should be entered into the counter. The maximum
“Delay Strokes” value is 255.
3.3.4.5 Separation Time
This parameter is required for the “2 Part Detector Edge” and “2 Part Detector Pass” channel types and
is can be used with the “Part Detect Anywhere” type. When a single sensor input is used to sense
multiple parts, the operator must also program a “Separation Time”. This is because some parts are
irregularly shaped or have holes which may cause the detector to give multiple signals to the channel
input for one part. To ensure that the detector counts only once for the first part, the module will wait
through a programmed delay after seeing the first part before it begins to look for the next part. This
programmed delay must be entered by the operator and is called “Separation Time”. The range of
allowed values for the separation time is 0 milliseconds to 9999 milliseconds in 1 millisecond
increments. The proper value for a particular application will have to be determined by
experimentation.
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