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Mitsubishi MELSEC Q Series User Manual

Mitsubishi MELSEC Q Series
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4 - 19
4.4 MELSECNET/H Module Access Function
4.4.1 Message communication
4
FUNCTIONS
POINT
The following precaution must be taken when a message is sent to the
MELSECNET/H module controlled by the programmable controller CPU.
When sending data to the same channel of the receiving station with ACK set,
execute the transmission after the receiving station has read out the previously
received data with the RECV instruction.
Failure to do so will cause an error. If an error is detected, retransmit the data after
a little while.
ret = QBF_SEND();
ret = QBF_SEND();
RECV
C Controller module
(Sending station)
User program
MELSECNET/H module
Channel 3
Error
Logical channel
(Channel 5)
Network module
CPU (Receiving
station)

Table of Contents

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Mitsubishi MELSEC Q Series Specifications

General IconGeneral
SeriesMELSEC Q Series
TypeModular PLC
Programming SoftwareGX Works2, GX Works3
CategoryProgrammable Logic Controller (PLC)
I/O ModulesDigital I/O, Analog I/O, High-Speed Counter, Positioning
CommunicationEthernet, CC-Link
Programming LanguagesLadder Logic, Structured Text, Function Block Diagram, Sequential Function Chart, Instruction List
MemoryFlash Memory
I/O PointsUp to 4096 points (expandable with additional modules)
Power SupplyAC or DC power supply options available, depending on the base unit and modules.
MountingDIN rail mounting
Operating Temperature0°C to 55°C
Storage Temperature-25°C to 75°C
Humidity5% to 95% (non-condensing)
Vibration Resistance10 to 57 Hz, 0.075mm amplitude
WeightVaries depending on the module, from a few grams to several kilograms.
Shock Resistance147 m/s² (3 times each in X, Y, Z directions)

Summary

CHAPTER1 OVERVIEW

1.1 Features

Describes the features of the C Controller module, including VxWorks, standard ROM, large data storage, and I/O control capabilities.

CHAPTER2 SYSTEM CONFIGURATION

2.1 System Configuration

Explains device configuration, development environment connection, and system configuration overview for C Controller systems.

2.1.1 Devices to be used

Details the base units, extension cables, power supply modules, and other components used with the C Controller module.

CHAPTER3 SPECIFICATIONS

3.1 General Specifications

Provides the general specifications of the C Controller module, including operating ambient temperature, humidity, vibration, and shock resistance.

CHAPTER4 FUNCTIONS

4.1 Function List

Lists the functions of the C Controller module, such as I/O module access, remote operation, and self-diagnostic functions.

CHAPTER5 SETTINGS AND PROCEDURES BEFORE OPERATION

5.1 Handling Precautions

Explains critical handling precautions for the C Controller module, including environment, installation, and connection safety.

CHAPTER6 I/O NUMBER ASSIGNMENT

6.1 Relation between No. of Base Units and No. of Slots

Explains how base units and slots relate to I/O number assignment for the C Controller module.

CHAPTER7 MEMORIES AND FILES HANDLED BY C CONTROLLER MODULE

7.1 Memory of C Controller Module

Explains user memories (Standard ROM, Work RAM, Battery-backed-up RAM, CompactFlash) and system memory.

CHAPTER8 INSTALLING AND UNINSTALLING SW[]PVC-CCPU

8.1 Development Environment

Details the product requirements for the development environment, including personal computer specifications and operating system.

CHAPTER9 UTILITY OPERATION

9.1 Common Utility Operations

Explains common operations for utilities, including starting, exiting, setting connection targets, and displaying help screens.

CHAPTER10 FUNCTIONS AND PROGRAMMING

10.1 Outline of Functions

Outlines bus interface functions and MELSEC data link functions supplied with SW PVC-CCPU for accessing modules and CPUs.

CHAPTER11 OVERVIEW OF MULTIPLE CPU SYSTEM

11.1 What is Multiple CPU System ?

Defines the multiple CPU system concept, explaining how multiple CPU modules work together for enhanced performance.

CHAPTER12 MULTIPLE CPU SYSTEM CONFIGURATION

12.1 System Configuration

Explains system configuration for multiple CPU systems, including device compatibility and connection methods.

CHAPTER13 MULTIPLE CPU SYSTEM CONCEPT

13.1 Mounting Position of CPU Module

Details the mounting positions of CPU modules (C Controller, Basic QCPU, High Performance QCPU, Motion CPU) in a multiple CPU system.

CHAPTER14 COMMUNICATIONS BETWEEN CPU MODULES

14.1 Data Communications by MELSEC Data Link Functions

Explains data communication methods using MELSEC data link functions between CPU modules, including auto refresh and shared memory.

CHAPTER15 PARAMETERS ADDED FOR MULTIPLE CPU SYSTEM

15.1 Parameter List

Lists parameters required for multiple CPU system operation, highlighting setup necessity and consistency checks in the C Controller setting utility.

CHAPTER16 PRECAUTIONS FOR USE OF AnS SERIES MODULE

16.1 Precautions for Use of AnS Series Module

Provides specific precautions for using AnS series modules, including applicable I/O and special function modules and control CPU settings.

CHAPTER18 TROUBLESHOOTING

18.1 Troubleshooting Basics

Provides fundamental steps for troubleshooting, including visual checks, fault verification, and narrowing down the error cause.

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