Rockwell Automation 2706-M1 MESSAGEVIEW 421 HARDWARE MANUAL - Manual (Page 66)

4–6 Running Applications
Publication 2706–816
3. Note: If you enter a value outside the range set for that variable,
an error message appears:
Value Not in Range
Minimum = –1000
Press ACK to continue
Value Not in Range
Maximum = 100
Press ACK to continue
Press the Ack key to clear the error message, and enter the
correct value.
4. Press the Enter key to terminate the message and transmit its
entered data to the controller.
5. Press the Decimal Point
.
and Plus/Minus keys to
terminate the message without saving any input data.
MessageView terminals can scale
•
Numeric Display variables
•
ASCII Display variables (if the entered data is displayed in
numeric format)
•
Numeric Entry variables
•
ASCII Entry variables (if the entered data is displayed in numeric
format)
The application program specifies if data scaling is used. The
MessageView terminal uses the following equation to scale data.
Y = mX + b
Where:
Y = scaled display or entered value
m = application scaling factor
X = machine control values (raw data)
b = application offset factor
Data Scaling