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151
Standard Mode
Section 4-9
4.9.2.2.3
Zooming Messages
Messages are displayed in a one-line format in the message mask for the sake of
clarity. In order to display a longer message in its full length, the message must first
be selected and then the Enter key pressed.
Message mask line, for example on the NT18S-SF121B-E:
1234 25:08:92 11:30:00 The measuring point in
Zoomed view:
1234 25:08:92 11:30:00
Measuring point 137 in the furnace has a
temperature of 285
!
C
The zoomed view remains active for as long as the Data Release key is held down.
With smaller displays with 4 x 20 characters only the message text is zoomed. The
terminal type that is to be used must be considered when the text is programmed, to
ensure the lines are wrapped correctly.
4.9.2.2.4
Acknowledging Messages
Message acknowledgement in the controller can be carried out by means of vari-
ables. Various Editors or function keys (soft keys) are suitable for this purpose. The
acknowledgement enables the controller to delete the message and verify the sta-
tus of the process.
4.9.2.3
Serial Message System
A 2 byte compartment is used in the cyclic poll area for the transmission of serial
messages. The byte order depends on the selected data type of the poll area (see
Poll Area). The PLC stores a 16 bit message number in this transmission compart-
ment. The operating terminal polls the entire poll area of the PLC at cyclic intervals
and transmits the serial message in the process. Upon detecting a message
(message number
.
0), this message is stored in the internal message memory of
the operating terminal and the compartment in the PLC is reset to zero. The value 0
in the compartment indicates to the PLC that the message has been fetched by the
terminal. The polling time of the cyclic data area is configurable.
The same procedure is used to address external masks and message masks.
Whenever the number transmitted corresponds to a mask number, this mask is
displayed. If a mask and a message text exist for this number, the mask (message
mask, full-page fault message text) is displayed and the associated message text
is entered into the message memory.
Make sure that the message number is always entered in the serial data compart-
ment as a 16 bit command. As a result of asynchronous processing of some data
transfer protocols, evaluation of the message number may lead to problems if the
message number has been entered with single-byte commands.
Summary of Contents for NT15S
Page 1: ...Cat No V056 E1 1 Programmable Terminal NT4S NT15S NT18S OPERATION MANUAL ...
Page 2: ...ii ...
Page 3: ...iii NT4S NT15S NT18S Programmable Terminal Operation Manual Produced March 1999 ...
Page 4: ...iv ...
Page 6: ...vi ...
Page 14: ...xiv ...
Page 26: ...12 The Terminals of the NT Series Section 1 2 1 2 4 1 2 NT4S SF122B E 1 2 4 1 3 NT4S SF123B E ...
Page 37: ...23 The Terminals of the NT Series Section 1 4 1 4 1 3 NT4S SF123B E 1 4 1 4 NT15S SF121B E ...
Page 54: ...40 The Terminals of the NT Series Section 1 7 1 7 6 3 ASCII Character Set Table ...
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