
MAN0890-02-EN CH. 11
August 20, 2009 Page 61 of 96 ECN # 979
CHAPTER 11: REGISTERS
11.1 QX751Resources
11.1.1 Overview
This section defines the resource limits that a programmer needs to know when writing a program
using the QX751. The QX751combines operator interface (display and keypad), local and remote I/O
(analog and digital), networking, and controller, into a single product. In addition, the QX751 has
graphical capabilities. The controller portion of the QX751 products is programmed in ladder logic via
the Windows-based Cscape (Control Station Central Application Programming Environment)
package.
11.1.2 Resource Limits
Table 11.1 – Resource Limits
Resource
QX451
QX451-16
QX551
QX551-16
QX651
QX651-16
QXxxx with
BP41*
QXxxx with
BP43*
%S 1 bit
13
%SR 16 bit
192
%T 1 bit
2048
%M 1 bit
2048
%R 16 bit
9999
%K 1 bit
7
%D 1 bit
1023
%I 1 bit
2048
%Q 1 bit
2048
%AI 16 bit
512
%AQ 16 bit
512
%IG 1 bit
64
%QG 1 bit
64
%AIG 16 bit
32
%AQG 16 bit
32
Ethernet
Ping, EGD, SRTP, Modbus TCP Slave, Ethernet IP, FTP, or HTTP @ 10 MBd or 100 MBd
CsCAN
N/A
125 kBd, 250 kBd, 500 kBd, or
1 MBd
Serial Ports
3 RS-232 / RS-485 Ports. Software Selectable.
IDs Per CsCAN
Network
N/A 64 w/o repeat (253 w/ 3 repeaters)
SmartStack
Modules
N/A
2 slots (22 with
FOX)
4 slots (24 with
FOX)
Keypad
7 user-defined Function keys and a System key
Display Type
800 x 600 TFT (LCD with Backlight)
Display Size
8.4” 10.4” 12.1” N/A
Display Screen
Dimensions
6.7”W x 5”H
(170 x 128mm)
8.3“W x 6.2“H
(211 x 159mm)
9.7“W x 7.3“H
(246 x 185mm)
N/A
Screen
Memory
8 MB
Colors
32,000
User Screens
1023
Objects Per
User Screen
300
Ladder Code
256 kB
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