Serial Communication Module User's Manual (Hardware) QJ71C24N, QJ71C24N-R2 QJ71C24N-R4 QJ71C24, QJ71C24-R2 Thank you for purchasing the Mitsubishi programmable logic controller MELSEC-Q Series. Prior to use, please read both this manual and detailed manual thoroughly to fully understand the product.
• SAFETY PRECAUTIONS • (Be sure to read these instructions before using the product.) Before using this product, read this manual and the relevant manuals introduced in this manual carefully and handle the product correctly with full attention to safety. Note that these precautions apply only to this product. Refer to the user's manual of the CPU module for the PLC system safety precautions. In this manual, the safety instructions are ranked as "DANGER" and "CAUTION".
[DESIGN PRECAUTIONS] CAUTION z Do not bundle the control lines or communication cables with the main circuit or power lines, or bring them close to each other. The distance of 100mm(3.9inch) or more should be ensured. Failure to do so cause malfunctions due to noise. [INSTALLATION PRECAUTIONS] CAUTION z Use the PLC in the environment specified in the user's manual of the CPU module. Failure to do so may cause electric shock, fires, malfunctions, product deterioration or damage.
[WIRING PRECAUTIONS] CAUTION z When energizing and operating the product after mounting and wiring, be sure to cover the terminals with the provided terminal covers. Failure to do so may result in malfunctions. z When wiring the external connection connectors, correctly press, pressureweld or solder the connecting part by using the tool specified by the manufacturer. Poor connection may cause short circuits, fires or malfunctions. z Connect the connectors to the module securely.
Revisions The manual number is given on the bottom left of the back cover. Print Date Manual Number Revision Sep., 1999 IB(NA)-0800008-A First printing Dec., 1999 IB(NA)-0800008-B Addition "Compliance with the EMC Directive and Low Voltage Directive", Chapter 6 (1) (a) · (c) ·(2) REMARK Correction "Safety Precautions", Chapter 2, Section 5.2 (3) Sep., 2000 IB(NA)-0800008-C Add the contents of the function version B.
CONTENTS 1. Overview...................................................................................................... 1 2. Performance Specifications ......................................................................... 2 3. Mounting and Installation ............................................................................. 3 3.1 Handling Precautions ............................................................................. 3 3.2 Installation Environment ......................................
1. Overview This manual is written to provide proper information and instructions on installation and wiring of the QJ71C24N, QJ71C24N-R2, QJ71C24N-R4, QJ71C24 and QJ71C24-R2 serial communication modules (hereinafter referred to as the serial communication module). Check that the following items are included with the product package.
2. Performance Specifications The following describes the performance specifications of the serial communication module. Use the modem function with reference to the relevant performance specifications in the user's manual (Basic). For general specifications of the serial communication module, refer to the user's manual of the CPU module.
Specifications (when the modern function is not used) QJ71C24N QJ71C24N-R2 QJ71C24N-R4 QJ71C24 QJ71C24-R2 7/0. 127 P HRV-SV Outside diameter 8.5mm (0.33in.) or more RS-232 (Oki Electric Cable Co., Ltd. Applicable number is specified in .) Recommended SPEV (SB)-MPC-0.2×3P Outside diameter approx. 6.5mm (0.26 in.) cable RS-422/485 (Mitsubishi Cable Industries, LTD.) (*1) SPEV(SB)-0.2×3P Outside diameter approx. 7.5mm (0.3 in.) (Mitsubishi Cable Industries, LTD.
4. Part Names QJ71C24N QJ71C24 ( 1) QJ71C24N-R2 QJ71C24-R2 ( 2) QJ71C24N 1) CH1 RUN NEU. SD RD QJ71C24N-R4 QJ71C24N-R2 ERR. NEU. SD CH2 RD 1) CH1 RUN NEU. SD RD ERR. NEU. SD CH2 RD QJ71C24N-R4 1) CH1 RUN NEU. SD RD ERR. NEU.
(1) LED display list QJ71C24N CH1 CH - LED RUN NEU. SD RD QJ71C24N-R2 ERR. NEU. SD CH2 RD Display contents Normal RUN operation display Error display ERR (*1) CH1 ON/Flickering Normal QJ71C24N-R4 ERR. NEU. SD CH2 RD OFF CH1 RUN NEU. SD RD ERR. NEU.
5. External Wiring 5.1 Connecting to the RS-232 line This section explans the standard method for connecting the RS-232 line.
(1) Example of connection to an external device which can turn on/off the CD signal (pin No. 1) The module Signal Pin number name CD 1 RD(RXD) 2 SD(TXD) 3 DTR(ER) 4 SG 5 DSR(DR) 6 RS(RTS) 7 CS(CTS) 8 RI(CI) 9 Cable connection and signal direction (Connection example of full or half duplex communication) External device Signal name CD RD(RXD) SD(TXD) DTR(ER) SG DSR(DR) RS(RTS) CS(CTS) (2) Example of connection to an external device which cannot turn on/off the CD signal (pin No.
(3) Connection precaution (a) Treat the FG signal and shield of the connection cable as indicated below: FG signal Shield Connection method Connect to the connector enclosure of the module. Connect to the FG terminal of the external device or connector enclosure of the module. Remark • Do not short the FG signal and SG signal of the connector cable. • When the FG signal and SG signal are internally connected in the external device, do not connect the FG signal to the module.
5.2 Connecting to the RS-422/485 line This section explains the standard method for connecting the RS-422/485 line.
POINT If the module is the first or last station on the RS-422/485 line, connect the following terminal resistor to the RS-422/485 interface with reference to the examples shown below. Data communication will be disturbed if a terminal resistor is not used. • For RS-422 communication .............................. 330 Ω 1/4 W • For RS-485 communication .............................. 110 Ω 1/2 W The R in the examples shown below indicates a terminal resistor.
(3) Example of one-to-n connection between external devices and the module (RS-485) C24 1) External device 1) External device 2) SDA SDA SDA SDA SDB SDB SDB SDB RDA RDA RDA RDB RDB RDB RDB SG SG SG SG R FG External device n FG R FG FG RS-422/485 cable RS-422/485 cable RDA RS-422/485 cable Terminal registor R (4) Example of m-to-n connection between external devices and the modules (RS-485) C24 1) External device 2) C24n SDA SDA SDA SDA SDB SDB SDB SDB RDA RDA R
(6) Connection precaution (a) When connecting the SG and FG signals of the module to an external device, follow the specification of the external device. (b) Connect the connector cable shield to either one of the FG terminals on the connected device. (c) If data communication cannot be performed normally due to external noise even if the wiring is done properly, install wiring as follows: • Connect the FGs of both stations using the connector cable shield.
6. Setting from GX Developer To use a serial communication module, set the intelligent function module switches of GX Developer as follows: (1) Switch 1 to 5 Set the transmission specifications and communication protocol for each interface according to the following table.
(b) Communication speed setting Communication speed (Unit: bps) 50 300 600 1200 2400 4800 9600 Bit location b15 to b8 0FH 00H 01H 02H 03H 04H 05H Communication speed (Unit: bps) 14400 19200 28800 38400 57600 115200 230400 Bit location b15 to b8 06H 07H 08H 09H 0AH 0BH 0CH Transmission speed 230400 bps is available for only CH1 of the QJ71C24N(-R2/R4).
(d) Station number settings 1) Set a value between 0 and 31 to the station number for the module used in communication via MC protocol. 2) For one to one connection between an external device and the module, set as 0. (2) Link operation settings To link the operation of two interfaces connected to the module, set the related switches as follows.
7. External Dimensions (1) QJ71C24N, QJ71C24 The following diagram shows the QJ71C24 and QJ71C24N. The dimensions of the QJ71C24 are the same as QJ71C24N (except for model name). Cable diameter 4+10 QJ71C24N CH1 RUN NEU. SD RD ERR. NEU. SD CH2 RD 98 (3.86) CH1 RS-232 R2 ( 2) SDA 1 SG SDB 3 (FG) RDA 90(3.54) 5 (FG) R1 ( 1) r1 ( 3) 4.5 (0.18) RDB 6 CH2 RS-422 /485 7 27.4 (1.08) (Unit:mm(in.
(3) QJ71C24N-R4 QJ71C24N-R4 CH1 RUN NEU. SD RD ERR. NEU. SD CH2 RD CH1 RS-422/485 SDA SDB R3 ( 1) RDB SG (FG) 98(3.86) r2 ( 2) RDA CH2 RS-422/485 SDA SDB RDA RDB SG (FG) QJ71C24N-R4 90 (3.54) 11.5 (0.45) 27.4 (1.08) (Unit:mm(in.
Warranty Mitsubishi will not be held liable for damage caused by factors found not to be the cause of Mitsubishi; machine damage or lost profits caused by faults in the Mitsubishi products; damage, secondary damage, accident compensation caused by special factors unpredictable by Mitsubishi; damages to products other than Mitsubishi products; and to other duties.
