17
3.3.3 No message is assigned to the Function key.
When the Function key is pressed, nothing happens.
3.4 Entering Numerical Values
MMI-110
MMI-140
The MMI-110 & 140 may have data or bit status embedded in messages for
the purpose of editing. Such data is usually machine status, setpoints and
other setup parameters that may need to be changed from time to time.
Such values flash when they are displayed. The operator may change
these values by the following procedure:
•
Press the CLR DATA key. The function keys will now act as numerical
entry keys.
•
Key in the new data value or use the 1 and 0 keys to change status.
•
Press the ENT key. Only after the ENT key is pressed will the new
value will be written to the PLC.
•
To escape from entering a value, wait ten seconds. The MMI will time
out and display the value that is in the register in the PLC.
MMI-100
The MMI-100
has no direct facility to allow the operator to enter
operational parameters outside of limited function key capabilities.
Numerical entry can still be achieved using some Controller Logic and the
function keys. This technique will use 5 or 6 MMI-100 function keys.
•
Designate a register in the PLC as the working register. This register
will be modified by Controller Logic prompted by function key actions.
•
Define 4 of the function keys to turn bits on momentarily. Use the
function key’s bits to trigger one shots that add 1, 10, 100 or 1000 to
the working register. You may want to designate another function key to
clear the working register.
•
Define a momentary function key to act as the Enter key. When this key
is pressed the Controller Logic should move the working register to its
intended destination.
•
Label the function keys appropriately.
Summary of Contents for MMI-1 Series
Page 2: ......
