Siemens Simatic S7 Series System Manual

Program instructions
7.5 Convert
S7-200 SMART
System Manual, 09/2015, A5E03822230-AC
199
LAD / FBD
STL
Description
ROUND IN, OUT
TRUNC IN, OUT
Round
:
Convert the 32-bit real-number value IN to a double integer value and place the
rounded result at the address assigned to OUT. If the fraction portion is 0.5 or
greater, the number is rounded up.
Truncate
:
Convert the 32-bit real-number value IN into a double integer value and place
the result at the address assigned to OUT. Only the whole number portion of
the real number is converted, and the fraction is discarded.
Note:
If the value that you are converting is not a valid real number or is too
large to be represented in the output, then the overflow bit is set and the output
is not affected.
SEG IN, OUT
SEG:
To illuminate the segments of a seven-segment display, the Segment instruc-
tion converts the character byte specified by IN to generate a bit pattern byte at
the address assigned to OUT.
The illuminated segments represent the character in the least significant digit of
the input byte.
Non-fatal error conditions with ENO = 0
SM bits affected
• 0006H Indirect address
• SM1.1 Overflow
• SM1.6 Invalid BCD
• SM1.1 Overflow
• SM1.6 Invalid BCD
Input / output
Data type
Operand
IN
BYTE
IB, QB, VB, MB, SMB, SB, LB, AC, *VD, *LD, *AC, Constant
WORD (BCD_I,
I_BCD), INT
IW, QW, VW, MW, SMW, SW, T, C, LW, AIW, AC, *VD, *LD, *AC, Constant
DINT
ID, QD, VD, MD, SMD, SD, LD, HC, AC, *VD, *LD, *AC, Constant
REAL ID, QD, VD, MD, SMD, SD, LD, AC, *VD, *LD, *AC, Constant
OUT
BYTE
IB, QB, VB, MB, SMB, SB, LB, AC, *VD, *LD, *AC
WORD (BCD_I,
I_BCD)
IW, QW, VW, MW, SMW, SW, T, C, LW, AC, *VD, *LD, *AC
INT (B_I, DI_I)
IW, QW, VW, MW, SMW, SW, T, C, LW, AC,, AQW, *VD, *LD, *AC
DINT, REAL
ID, QD, VD, MD, SMD, SD, LD, AC, *VD, *LD, *AC

Siemens Simatic S7 Series Specifications

General

CPU	Varies by model (e.g., S7-300, S7-400, S7-1200, S7-1500)
Communication Interfaces	PROFIBUS, PROFINET, Ethernet, MPI
Programming	TIA Portal, STEP 7
Programming Languages	LAD, FBD, STL, SCL, GRAPH
I/O Modules	Digital, Analog, Specialty modules available
Operating Temperature	0°C to 60°C (standard models)
Mounting	DIN rail mounting
Operating Voltage	24V DC or 120/230V AC (varies by model)
Protection Class	IP20 (standard models)
Memory	Varies depending on the S7 model. Includes work memory (RAM) for program execution, load memory (EEPROM or Flash) for program storage, and system memory for operating system functions. Memory sizes range from kilobytes to megabytes.