Omron SYSMAC CV Series User Manual

301
UF (A50010): Absolute value of the result is less than the minimum value
that can be expressed for floating-point data.
5-21-7 FLOATING-POINT MULTIPLY: *F(456)
(456)
*FMdMrR
Ladder Symbol
Variations
↑*F(456)
Operand Data Areas
Md: First multiplicand word CIO, G, A, T, C, #, DM
R: First result word CIO, G, A, DM
Mr: First multiplier word CIO, G, A, T, C, #, DM
When the execution condition OFF, *F(456) is not executed. When the execu-
tion condition is ON, *F(456) multiplies the 32-bit floating-point content of Md
and Md +1 by the 32-bit floating-point content of Mr and Mr +1 and places the
result in R and R+1.
R+1 R
Md Multiplicand (floating-point data, 32 bits)
Md+1
Mr Multiplier (floating-point data, 32 bits)
Mr+1
Result (floating-point data, 32 bits)
x
If the absolute value of the result is greater than the maximum value that can be
expressed for floating-point data, the Overflow Flag (A50009) will turn ON and
the result will be output as ±.
If the absolute value of the result is less than the minimum value that can be ex-
pressed for floating-point data, the Underflow Flag (A50010) will turn ON and the
result will be output as 0.
The various combinations of multiplicand and multiplier data will produce the re-
sults shown in the following table.
Multiplicand
Multiplier 0 Numeral + – NaN
0 0 0 ER ER
Numeral 0
See note 1.
+/– +/–
+ ER +/– + –
– ER +/– – +
NaN
ER
Note 1. The results could be zero (including underflows), a numeral, +, or –.
2. ER: The Error Flag (A50003) turns ON and the instruction is not executed.
Precautions Md, Md+1, Mr, and Mr+1 must be floating-point data.
Note Refer to page 115 for general precautions on operand data areas.
Flags ER (A50003): Md, Md+1, Mr, and Mr+1 are not floating-point data.
The content of a*DM word is not BCD when set for BCD.
EQ (A50006): The exponent and mantissa of the result are 0.
N (A50008): The result is a negative number.
OF (A50009): The absolute value of the result is greater than the maximum
value that can be expressed for floating-point data.
Description
(CVM1 V2)
Floating-point Math Instructions
Section 5-21

Omron SYSMAC CV Series Specifications

General

Series	SYSMAC CV Series
Type	PLC
Input Voltage	100 to 240 VAC, 24 VDC
Number of Inputs	Varies by model
Number of Outputs	Varies by model
I/O Capacity	Up to 2048 points
I/O Points	Varies by model
Communication Ports	RS-232C, RS-422/485
Programming Language	Ladder Logic
Power Supply	100-240V AC or 24V DC
Mounting	DIN rail mounting
Operating Temperature	0°C to 55°C

Summary

PRECAUTIONS

2 General Precautions

User must operate product per specifications; consult OMRON for non-manual conditions or critical systems.

3 Safety Precautions

Precautions regarding power supply, terminal touching, disassembly, repair, and battery handling.

4 Operating Environment Precautions

Guidelines for environmental conditions for PC system installation and operation.

5 Application Precautions

Precautions for safe PC system usage, grounding, power supply, wiring, and program changes.

SECTION 1 Introduction

1-5 Overview of PC Operation

1-6 PC Operating Modes

SECTION 2 Hardware Considerations

2-1 CPU Components

2-2 Program Memory

2-3 Memory Cards

Covers file memory used to store programs and other data, including RAM, EPROM, and EEPROM types.

2-7 PC Configuration

Provides an overview of the PC configuration, including CPU Rack, Expansion CPU Rack, and Expansion I/O Rack.

SECTION 3 Memory Areas

3-2 Data Area Structure

Describes two sets of addresses for accessing PC memory: data area addresses and memory addresses.

3-3 CIO (Core I/O) Area

Details CIO Area addresses, divided into eight data areas for I/O control and internal data manipulation.

3-6 Auxiliary Area

Contains flags and control bits for monitoring and controlling PC operation, accessing clock pulses, and signaling errors.

3-11 DM and EM Areas

SECTION 4 Writing Programs

4-1 Basic Procedure

Outlines basic steps for writing a program, including I/O device list and work bit allocation.

4-3 Basic Ladder Diagrams

Describes ladder diagrams, which consist of vertical lines (bus bars) and branching lines (instruction lines or rungs).

4-4 Mnemonic Code

4-7 Controlling Bit Status

Lists instructions used to control individual bit status, such as OUTPUT, SET, RESET, and KEEP.

4-10 Programming Precautions

Provides guidelines on programming practices, such as unlimited conditions in series or parallel and avoiding vertical conditions.

4-11 Program Execution

SECTION 5 Instruction Set

5-2 Instruction Format

5-3 Data Areas, Definers, and Flags

5-6 Ladder Diagram Instructions

Covers instructions that correspond to ladder diagram conditions and logic block instructions for complex relationships.

5-7 Bit Control Instructions

Explains instructions used to control bit status by turning bits ON and OFF in different ways.

5-8 INTERLOCK and INTERLOCK CLEAR: IL(002) and ILC(003)

5-9 JUMP and JUMP END: JMP(004) and JME(005)

5-10 CONDITIONAL JUMP: CJP(221)/CJPN(222)

5-13 Timer and Counter Instructions

Details instructions for creating timers and counters, accessing PVs and Completion Flags.

5-14 Shift Instructions

5-15 Data Movement Instructions

Explains instructions used for moving data between different addresses in data areas.

5-16 Comparison Instructions

Covers instructions used for comparing data, affecting comparison flags and outputting results.

5-17 Conversion Instructions

Explains instructions that convert word data from one format to another, outputting converted data to specified result words.

SECTION 6 Program Execution Timing

6-1 PC Operation

6-2 Cycle Time

Explains operations affecting cycle time and I/O response time, and shows basic cycle time calculation.

6-3 Calculating Cycle Time

6-4 Instruction Execution Times

6-5 I/O Response Time

Explains the time taken for the PC to output a control signal after receiving an input signal.

SECTION 7 PC Setup

7-1 PC Setup Overview

7-2 PC Setup Details

7-3 PC Setup Default Settings

SECTION 8 Error Processing

8-1 Alarm Indicators

8-2 Programmed Alarms and Error Messages

8-3 Reading and Clearing Errors and Messages

8-4 Error Messages

Classifies errors into initialization, non-fatal operating, and fatal operating errors for message display.

8-5 Error Flags

Appendices

A Instruction Set

Details all ladder diagram programming instructions, variations, and applicable data areas.

B Error and Arithmetic Flag Operation

Explains instructions affecting ER, CY, GR, LE, EQ, OF, UF, and N flags.

C PC Setup Default Settings

Lists default values for PC Setup parameters.

D Data Areas

Summarizes data areas in CV-series PCs, including CIO, Temporary Relay, and Auxiliary Areas.