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Mitsubishi Communications Modules

QJ71C24N_QJ71C24N-R2_QJ71C24N-R4.eps

MELSEC Q Series / iQ Serial Communication Modules

Serial communication modules provide a way to link the Q Series system to third party systems that offer standard serial RS-232 or RS-422/485 communication ports. Examples of typical connections include modems, scales, bar code readers, printers and marquee displays. The modules can be regarded as communication co-processors, as they support a variety of dedicated communication functions that are accessed via special CPU instructions. These functions reduce the amount of specialist communications programming required.

Key Features:

  • Module set up via software without programming
  • Many pre-made protocols built-in to the configuration software
  • Protocol function block allows complex communication protocols to be configured without any programming. Library of preset function blocks available to communicate with third party devices
  • Debugging function allows communication signals to be monitored and packet data to be examined
  • 230,400 bps communication speed; run both serial ports on the module at 115,200 bps simultaneously
  • Use as a duplicate CPU programming port (offers full CPU port capabilities, including program upload/download, device monitoring, etc)
  • Use preset MC (MELSEC Communications) or user defined protocols
  • Two communications ports per module, each operable independently
  • Remote system management & maintenance via third party modems
  • Multi-drop communications between multiple systems via RS-422/485 ports
  • Available with two RS-232 ports, or RS-232 + RS-422/485 ports

Note: The Q Series Ethernet communication modules (QJ71E71, QJ71E71-B2 & QJ71E71-100) also use the MC protocol.

Serial Communication Module

Model Number

QJ71C24N

QJ71C24N-R2

QJ71C24N-R4

Stocked Item

S

S

S

Certification

UL • cUL • CE

UL • cUL • CE

UL • cUL • CE

Interface

CH1

RS-232-compliance (D-sub 9P)

RS-232-compliance (D-sub 9P)

RS-422/485-compliance (2-piece plug-in connector socket block)

CH2

RS-422/485-compliance (2-piece terminal block)

RS-232-compliance (D-sub 9P)

RS-422/485-compliance (2-piece plug-in connector socket block)

Communication Method

Full duplex communication/half duplex communication

Synchronization Method

Start-up synchronization method

Transmission Speed

50

300

600

1200

2400

4800

9600

14400

19200

28800

38400

57600

115200

230400

• Transmission speed 230400 bps is available for only CH1. (Not available for CH2)
• Total transmission speed of two interfaces is available up to 230400 bps.
• Transmission speed of up to 115200 bps for each interface is available when two interface are used simultaneously.

Data Format

Start Bit

1

Data Bit

7/8

Parity Bit

1 (vertical parity) or none

Stop Bit

1/2

Access Cycle

MC Protocol Communication

Processes one request during installed PLC CPU END processing. Number of scans that must be processed/number of link scans depends on the contents of the request.

Nonprocedural Protocol Communication Bidirectional Protocol Communication

Sends each time a send request is issued. Can receive at any time.

Error Detection

Parity Check

For all protocol, select odd/even by the parameter when there is an error.

Sum Check Code

Select by the parameter for MC protocol/Bidirectional protocol. Select by the user frame for non-procedure protocol.

Transmission Control

 

RS-232

RS-422/485

DTR/DSR (ER/DR) Control

-

RS/CS Control

-

CD Signal Control

-

DC1/DC3 (Xon/Xoff) Control, DC2/DC4 Control

• DTR/DSR signal control and DC code control are selected by the user.

Line Configuration

RS-232

1:1

1:1

-

RS-422/485

1:1, 1:n, n:1, m:n

-

1:1, 1:n, n:1, m:n

Max. Transmission Distance (Overall Distance)

RS-232

15m (49.2 ft.)

15m (49.2 ft.)

-

RS-422/485

1200m (4592.4 ft.) (overall distance)

-

1200m (4592.4 ft.) (overall distance)

I/O Device Points Occupied

32 points per slot (I/O assignment: Intelli: 32 points)

Applicable Connector for External Wiring

9 pin D-sub (male) screw type

-

5VDC Internal Current Consumption

0.31A

0.26A

0.39A

Weight kg (lbs)

0.20 (0.44)

Base Unit Slots Occupied

1

Compatible Modem Specifications

Telephone Line

Public Line/Private Line/Cellular Phone

ISDN

Connection Line

Analog 2-wire type

ISDN line

Initialization

Hayes AT command-compatible product

Hayes AT command-compatible product

Communication Standard

V.34/V.32bis/V.32/V.22bis/V.22/V.21V.fc, 212A/103

V.110 (B-channel circuit exchange, D-channel packet switching)

Error Correction

Class 4, class 10 compatible, V.42 compatible

Data compression

Class 5 compatible, V.42bis compatible

Others

Should be able to exercise flow control (RS/CS control) and have independent control of DR (DSR) signal.

* When using a cellular phone, it is recommended to use a modem whose error correction function supports MNP class 10.

Note that communications may not be made depending on the line status.

QD51_QD51-R24.eps

MELSEC Q Series / iQ Intelligent Communication Modules

The modules offer a higher-level alternative to the QJ71C24 & QJ71C24-R2. The QD51 & QD51-R24 can run their own BASIC programs, allowing complex communications based tasks to be handled separately of the other CPUs on a Q Series system.

Key Features:

  • Runs AD51H-BASIC
  • Can run two tasks simultaneously
  • Can use external hard disks of connected peripherals
  • Range of communications options supported
 

Model Number

QD51

QD51-R24

Stocked Item

-

Programming Language

AD51H-BASIC

Internal Memory

Program memory: 64k bytes/2 tasks (Capacity of task 1 + capacity of task 2 = 64k bytes); Common memory: 8k bytes; Buffer memory: 6k bytes; Expanded register: 1024 points (2k bytes); Expanded relay: 1024 points

I/O to / From PLC CPU

Input 26 points, output 23 points

Memory Protection

Yes, (Flash ROM write protectable)

Communication Port

QD51 : RS-232 2ch; QD51-R24 : RS-232 1ch, RS-422/485 1ch

Communication System

Full-duplex

Synchronization System

Synchronous

Transmission Speed (bps)

300, 600, 1200, 2400, 4800, 9600, 14400, 19200, 28800, 38400; Usable when the total transmission speed of two channels is within 38400bps.

Data Format

Start bit: 1; Data bit: 7 or 8; Parity bit: Even, odd, none; Stop bit: 1 or 2

Transmission Control

DTR/DSR (ER/DR) control: Available for RS-232 only; RS/CS control: Available for RS-232 only; CD signal control: No; DC1/DC3 (Xon/Xoff) control: Yes; DC2/DC4 control: No

Clock Function

No

Power Failure Compensation

No

Storage of User Program onto ROM

No (only program area data is stored onto flash ROM)

Console

IBM PC/AT personal computer

Multi-Task Debugging

Possible (using debugger)

Line Configuration

RS-232:1:1; RS-422/485:1:1, 1:n, n:1, m:n

Transmission Distance

RS-232: Max. 15m (49.18 ft.); RS-422/485: Max. 1200m (3934.43 ft.) (overall distance)

I/O Device Points Occupied

32 points (1 slot occupied) (I/O assignment: Intelligent)

Internal Current Consumption (5VDC) (A)

0.26

0.31

Weight (kg)

0.2

Base Unit Slots Occupied

1

 

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