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The MMI-220 and 240 may have data or bit status embedded
in a message for the purpose of editing. Such data is usually
machine status, setpoints or other setup parameters that may
need to be changed from time to time. When a Special or
Function key message with an embedded register Action
Field is displayed, the value will flash, prompting the operator
to input data.
MMI-220, 240
The operator may change these values by using the same procedure as for the
MMI-210 (see p.18), except the
NUM
key will already be active and the LOCK LED
will be set ON.
Alternatively, the MMI-220 or 240 may be programmed to have the
NUM
key
permanently active. If it has, the LOCK LED above the key will always be ON.
This feature cannot be changed from the front panel. The operator may change
data values by the following procedure:
•
The LOCK LED above the key will
always be lit. This indicates that
the appropriate function keys act
as a numeric keypad for data
entry only.
•
Enter a password, if one has been
assigned, and press the
ENT
key.
•
Key in the new data value, or use
the 0 and 1 keys to change bit
status.
•
Press the
ENT
key. Only after the
ENT
key is pressed will the new
value 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.
To program the
NUM
key to be permanently active, select the Lock Status in the
Edit|Setup menu in
MMISoft
as NUM LOCK always active. This setting will turn
on the LOCK LED above the
NUM
key and permanently activate the numeric
keypad (0 to 9, CLR and ENT) for data entry. Function keys F1 to F12 (and
corresponding shifted keys F21 to F32) will not be active and will be unavailable for
function key use. They may only be used for numeric data entry.
The MMI-200 has no direct facility to allow the operator to
enter operational parameters outside of function key download
capabilities.
MMI-200
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