Operating a project
8.2 Operating a project on TP 177micro
OP 73micro, TP 177micro (WinCC flexible)
118
Operating Instructions, 09/2007, 6AV6691-1DF01-0AB0
Limit value test of numerical values
Tags can be assigned limit values. The current limit values are indicated in the numerical
screen keyboard. If an alarm window has been configured, a system alarm is automatically
output to indicate any violation of the configured input value limits. For example, 80 exceeds
the configured limit value of 78. The entered value is therefore rejected and the original value
is displayed again.
Decimal places for numerical values
If a numerical input field is configured for a specific number of decimal points, decimal places
in excess of the limit are ignored. Empty decimal places are filled with "0" after the number is
confirmed.
Alphanumerical values
Alphanumerical values (numbers and letters) can be entered character by character using
the alphanumerical screen keyboard.
Symbolic values
Symbolic values are entered from a list of predefined entries using the symbolic screen
keyboard.
Date and time
You can enter date/time values character by character using the alphanumerical screen
keyboard.
8.2.3.2
Entering and editing numerical values
Numerical screen keyboard
When you touch an IO field on the HMI device touch screen, the numerical screen keyboard
appears. The keyboard is automatically hidden again when input is complete.
Figure 8-4
Numerical screen keyboard
The layout of the screen keyboard for a vertically mounted HMI device differs slightly from
that shown in the figure above.
