LINK Systems System 1100 Tonnage Monitor - Manual (Page 15)

OPERATION
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2-4
The LOW LIMIT ON/OFF key is used to switch the low setpoint limits
on or off. This functions is accessible only while the keyswitch
is in the PROG position.
2.1.2.3 DOWN TIME CODE key
The DOWN TIME CODE key is for use with the Link System Tonnage
Monitor local area network system and is not used at this time.
2.1.2.4 TONNAGE FORWARD/REVERSE key
The TONNAGE FORWARD/REVERSE key is used to switch the tonnage
displays between forward and reverse tonnage. When reverse tonnage
is selected a minus sign will appear at the left of each tonnage
display, when forward tonnage is selected the minus sign will go
out.
2.1.2.5 HELP key
The operator may request a Help screen from the System 1100 by
pressing the HELP key. The Help screens are intended to aid the
operator by giving additional information and explanation of the
current stage of the program sequence. Some Help screens may be
more than two lines long. If the last character on the screen is
a down arrow, more help information is available. The operator can
press the down arrow key to view the additional lines. The
operator can terminate a help screen and return to the program at
any time by pressing the EXIT key . If no help screen is available
for the present program sequence, a message will inform the
operator that a help screen is not available.
2.1.2.6 CLEAR key
The CLEAR key is used for two main functions. The first function
is to remove any data input in progress. If the operator keys in
the wrong data but has not yet pressed the ENTER key, he may press
the CLEAR key to remove the entire data input. The correct data
may then be keyed in. The CLEAR key cannot remove any data once it
has been entered with the ENTER key.
The second function of the CLEAR key is to clear stops, alarms and
errors. If a counter reaches its programmed limit and stops the
machine, the CLEAR key can be pressed to reset the counter and
allow the machine to be restarted. If an alarm is present, such as
channel 3 high setpoint alarm, or and error is present, such as