Maple Systems OIT Family - Manual (Page 82)

Edit Keys
Clear
The CLEAR key is used to perform three functions:
• If an alarm is active, pressing CLEAR turns off the buzzer.
• In setup mode, pressing CLEAR backs out of the menus and eventually exits setup mode
without saving any changes.
• When the cursor is on a read/write PLC register monitor, pressing CLEAR activates data
entry mode and clears the register monitor’s contents.
Requirements: The CLEAR key is not required when using alarms, since the ALARM
ACKNOWLEDGE key also turns off the buzzer. The CLEAR key is not required in setup
mode, since you do not have to back out of the menus. The CLEAR key is required to change
the value in a read/write PLC register monitor when using the numeric keys. However, you
can configure read/write PLC register monitors with preset increment/decrement values and
then use the DELTA+ and DELTA- keys to change the read/write PLC register monitor value
instead of using the numeric, CLEAR, and ENTER keys.
Enter
The ENTER key is used to perform two functions:
• In setup mode, pressing ENTER accepts the current entry and advances to the next menu.
• When the cursor is on a read/write PLC register monitor, pressing ENTER accepts the
data entered by the OIT operator and updates the PLC register.
Requirements: The ENTER key is required to use setup mode. The ENTER key is required to
change the value in a read/write PLC register monitor when using the numeric keys. However,
you can configure read/write PLC register monitors with preset increment/decrement values and
then use the DELTA+ and DELTA- keys to change the read/write PLC register monitor value
instead of using the numeric, CLEAR, and ENTER keys.
Numeric Keys
0 to 9
The 0 to 9 keys are used to enter passwords (setup, alarm, or function key) and to change
values in read/write PLC register monitors.
Requirements: The 0 to 9 keys are required when using passwords. However, all
passwords are optional. The 0 to 9 keys are not required to change the value in a
read/write PLC register monitor. Instead you can configure read/write PLC register
monitors with preset increment/decrement values and then use the DELTA+ and
DELTA- keys to change the read/write PLC register monitor values.
+/-
The +/- key changes the sign of the value in the current read/write PLC register monitor.
Requirements: The +/- key is not required unless the OIT operator needs to enter
negative values into read/write PLC register monitors.
Key Types 82
1010-0099, Rev. 07