PX 30 and PX 120 Operating Manual
2-1
Operation
The PX 30 and PX 120 can be driven in parallel through a PLC's I/O-level or in serial
through the V24 interface of a PLC or PC.
The PX 30 has 16 inputs and the PX 120 has 24 inputs available for parallel drive, plus
one output.
The PX 120 can be configured to use just 16 inputs (instead of 24) for communicating data
and commands. The configuration of "16-input mode" is explained in the chapter entitled
"Configuration" from page 6-1 onwards.
Both units (PX 30 and PX 120) can be operated as either a:
• Text Display or
• Text Monitor.
You can select the mode (display or monitor mode) in which the display unit will operate
via input E15 on the PX 30 and input E23 on the PX 120:
• E15 or E23 high = monitor mode
• E15 or E23 low = display mode
In display mode, the PLC selects the text stored in the memory through its text number,
and variable values sent from the PLC are inserted in the displayed text.
In monitor mode, texts are sent from the PLC as characters from the IBM character set
(extended ASCII character set). Control commands such as cursor positioning and the
allocation of attributes, etc. must be sent as part of the message.
The features of the two different display modes are described in the table below. The two
right-hand columns tell you where you can find additional information on the individual
features.
Operating in
Display Mode
Feature
Refer to Chapter /
From
Section
Page
Both parallel and serial drive is possible:
- parallel drive via 24 inputs (PX120)
Parallel drive via a
3-5
PLC's I/O level -
display mode:
Text display with
24 inputs
- parallel drive via 16 inputs (PX 30 or PX 120 in
Text display with
3-12
16-input mode)
16 inputs
- serial drive
Serial drive
3-22
display mode
System Description PX 30 and PX 120
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
