Using Operands In A Program - Eaton easyE4 Manual

5. Programming on the device

5.7 Using operands in a program

5.7 Using operands in a program
200
Only operands can be processed in a program. Accordingly, device input values, device
output values, device P button states, diagnostic alarms, and backlight LED outputs
need to be stored in operands. All operands can be mapped to markers, and markers
are also considered operands. In fact, these markers can be used for bit, byte, word,
and double word access in the program and for implementing simple calculations and
connections.
Elementary data types
Following is a list of the various elementary data types. These data types are inde-
pendent of the programming language you select.
Type/(description)
BOOL/(Bit)
BYTE/(Byte)
WORD/(Word)
DWORD/(Double Word)
Permissible operands at a glance
Table 70: Permissible operands
Operand Explanation
I Input
Q Output
P P buttons
ID Diagnostic alarm
IA Analog Input
QA Analog output
M Markers
MB Marker byte
MW Marker word
MD Marker double word
LE LED output
RN Input bit via NET (receive)
SN Output bit via NET (send)
N Network marker
NB Network marker byte
NW Network marker word
ND Network marker double word
easyE4 10/19 MN050009 EN www.eaton.com
Length Format
in bits
1 Binary (bool)
8 Decimal number
(unsigned)
16 Decimal number
(unsigned)
32 Decimal number
(signed)
Value range Example
0/1, FALSE/TRUE TRUE (1)
0...255 128
0 - 65535 1023
-2 147 483 648... - 65535
+2 147 483 647
Data Data
width: type
1 bit BOOL
1 bit BOOL
1 bit BOOL
1 bit BOOL
32 bit DINT
32 bit DINT
1 bit BOOL
8 bit BYTE
16 bit WORD
32 bit DINT
1 bit BOOL
1 bit BOOL
1 bit BOOL
1 bit BOOL
8 bit BYTE
16 bit WORD
32 bit DINT