EUCHNER HBLS 072725 - Handbuch (Seite 37)

EUCHNER Pendant station HBLS 072725
067018-08-01/06 Subject to technical modifications page 15 / 22
10. LC-Display
The LCD operates in text mode.
The PLC transfers style attributes and content of the displayed message.
Frequently used messages will be transferred to the HBLS during an initialising routine and
stored in the data memory (RAM). These messages can then be displayed by a short
command.
Command to the LCD:
PLC:
STX LCD Data block DLE ETX BCC
LCD: DLE DLE
Acknowledge:
PLC:
DLE DLE
LCD: STX LCD Acknowledge block DLE ETX BCC
Each data block, which includes a command for the LCD (in contrast to push-buttons or
selector switches) has to have a LCD identifier byte as the first sign:
Hex 0x6C / ASCII "small-l".
A data block can include several commands with a maximum length of 128 Bytes.
LCD Acknowledge block:
After being adapted, each command has to be acknowledged with the LCD Acknowledge
block. During this procedure, the HBLS is able to handle push buttons and LED commands.
A further LCD data block can only be sent after the LCD Acknowledge block.
The acknowledge block includes the LCD identifier byte and an additional Status-Byte.
Status-Bytes:
0x31 command okay
0x32 no defined text selected
0x33 no defined area selected
0x34 illegal parameter
Hint: After a status check (request the actual status), the LCD Acknowledge block is no
longer sent.