Instruction manual

1070 072 163-101 (97.11) GB
BT20 Menu Descriptions 8-17
8.4.3.2 Serial Messages
Serial messages are entered, together with their message number, in
data word D496 in data module DM255. For this purpose, the following
handshake must be performed:
• Load contents of D496
• If D496=0, the PLC program will be able to write a message num-
ber into the data word.
• Once the message number has been transferred tom the BT op-
erator terminal, the BT will write the value of 0
hex
into the data word,
and the PLC program can send a new message.
Serielle Meldungen
192 Öldruck in Ordnung 17.05.1996 13:20
Fig. 8-16 Example of Serial Messages
Display Contents
The display indicates current status messages (e.g. Outputs Disabled) via
the flashing LED in the [MELD] key. The messages appear in the display
line for status messages. Additional messages can be displayed in plain-
text form by pressing the [MELD] function key. The ZE STOP message is
not displayed here.
Menu Control
[F1] Status messages
[F3] Message parameters