LINK Systems 5100-8 Tonnage & Analog Signal Monitor - Manual (Page 22)

Doc #: L-802-1110 Page 20 Rev. 02
3.2.2.2 Setting Low Limits
To set a low limit, first choose the view and channel to change. Place the data entry cursor on a low
limit setpoint (see “c” in Figure 5) using the up, down, left, and right arrow keys. Softkey 1 (The
uppermost vertical softkey) should read CHANGE LOW LIMIT. Press this softkey to enter numeric
entry mode (or simply start entering numbers after the field is selected). Enter the new limit with the
numeric keypad and press the ENT key to set the limit. The low limit MUST be less than the high limit
for that channel and view! Note that setting this value to zero effectively disables it.
3.2.2.3 Setting Reverse Limits
To set a reverse limit, first set the view to “peak reverse” as shown in Figure 7. Place the data entry
cursor on a reverse limit setpoint (see “n” in Figure 7) using the up, down, left, and right arrow keys.
Softkey 1 (The uppermost vertical softkey) should read CHANGE REV LIMIT. Press this softkey to
enter numeric entry mode (or simply start entering numbers after the field is selected). Enter the new
limit with the numeric keypad and press the ENT key to set the limit.
3.2.2.4 Automatically Setting Limits
The AUTO SETUP softkey initiates an automatic calculation of tonnage limits based on the tonnages
that the tool is currently reading. Like manually setting limits, this is a restricted function. The operator
must have access via RUN/PROG Key or access code depending on how the system has been
configured (See section 11 on page 78 for access configuration details). When this key is pressed, a box
will appear which allows the operator to enter a Percent Tolerance (percent of machine rating of each
channel) which is applied to the peak tonnage recorded during the automatic setup process. A tolerance
from 1% to 10% of the channel rating is added to the highest tonnage recorded in the 16 successive
strokes made in the auto setup mode in order to calculate the High Limit. The tolerance is subtracted
from the lowest peak tonnage recorded during the procedure in order to calculate the Low Limit. The
tolerance is subtracted from the most negative peak tonnage recorded in order to calculate the Reverse
Limit. The 16 strokes of the automatic setup process will not begin until after the number of strokes set
in the “Low Limit Bypass Strokes” parameter (see Section 3.4 on page 29 for details) have elapsed.
WARNING: While in auto setup mode, the tonnage monitor module will ignore any
high, low, or reverse alarm. Only machine rating alarms are active.
For progressive dies, material should complete its progression through
all stations before beginning auto setup.
To begin the automatic setup procedure the operator must remain in the tonnage monitor screen, switch
the RUN/PROG keyed selector switch to the RUN position, and stroke the press in order to allow the
tonnage monitor to measure the typical variation of the process. The actual tonnages and number of
strokes remaining are automatically updated each stroke. A maximum of 60 seconds is allowed between
strokes or the setup procedure will automatically abort and leave the present limits unchanged. After the
last stroke, the tonnage monitor module will automatically exit the automatic setup mode and calculate
the tonnage limits. Normal operation will continue with the new limits. Low limits and reverse limits
are updated even if turned OFF. Data window limits are not updated if the data window is turned OFF.
Once started, the AUTO SETUP softkey changes to CANCEL AUTO SETUP. The automatic setup