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Toshiba PROSEC T2 Series manual

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Table of contents for the manual

  • Page 1

    UG-TS02 ∗∗∗ -E022 PROGRAMMABLE CONTROLLERS PROSEC T2-Series USERS MANUAL − Modbus Module − TOSHIBA CORPORATION[...]

  • Page 2

    Page ii Important Information Misuse of this equipment can result in property damage or human injury. Because controlled system applications va ry widely, you should satisfy yourself as to the acceptability of this equipment for your intended purpose. In no event will Toshiba Corporation be responsible or liable for either indirect or consequential[...]

  • Page 3

    Page iii Safety Precautions This application guide is prepared for users of Toshiba programmable controller PROSEC T2-Series and EX100 Series (hereafter called T2). Read this guide and your PLC's manual thoroughly to use the PLC system safely. Hazard Classifications In this guide, the following two hazard classifications are used to explain th[...]

  • Page 4

    Page iv About This Guide This guide describes how to setup and use the Toshiba EX10-MML11 Modbus module. When used in a Modbus network, t he EX10-MML11 module allows any Modbus master to write to/read from the registers in an EX100 or T2 PLC using standard Modbus RTU protocol.[...]

  • Page 5

    Page v Contents Important In formati on .......................................................................................................... ...... ii Safety Pr ecauti ons ............................................................................................................. ...... iii About This Guide ..................................[...]

  • Page 6

    [...]

  • Page 7

    Page 1 1. Overview The Modbus module (ML11) is us ed to connect T2E, T2N, or EX100 PLCs to a Modbus Master. The addition of the EX 10-MML11 (MODBUS Module) allows the T2E, T2N or EX100 PLC to communicate via standard MODBUS RT U protocol. This allows quick and easy access to the PLC registers by a standard MODBUS Master. Using the ML11 Modbus modul[...]

  • Page 8

    Page 2 2. System Configuration From 1 to 32 T2E or T2N PL Cs can be connected to a Modbus master using the Modbus module. 1 to 1 Configuration T2 Minimum Configuration T2E PLC RS485 Power Su pp l y T2E CPU Modbus Module I/O Modules Modbus Master 1. Higher Level PLC 2. Distributed Control System 3. Computer with SCADA or HMI Program[...]

  • Page 9

    Page 3 1 to N Configuration Modbus Master 1. Higher Level PLC 2. Distributed Control System 3. Computer with SCADA or HMI Program RS485 T2 Maximum Configuration 1 Main Unit 3 Exp. Units U p to 32 Stations For high-speed data transfer, one of Toshiba’s Tosline Data Highway modules is recommended.[...]

  • Page 10

    Page 4 3. External Features and Switch Settings[...]

  • Page 11

    Page 5 4. Specifications ITEM SPECIFICATION INTERFACE TERMINAL BLOCK COMMUNICATION STYLE HALF-DUPLEX SIGNAL CONFIGURATION TXA/RXA TXB/RXB SYNCHRONIZATION START-STOP NETWORK TOPOLOGY PARTY LINE (MULTIDROP) COMMUNICATION SPEED 300, 600, 1200, 2400, 4800, 9600, 19200 bps TRANSMISSION DISTANCE 1 KM MAX COMMUNICATION MODE RTU MODE DATA LENGTH 8 BITS STO[...]

  • Page 12

    Page 6 5. Modbus Module Operation 5.1. Modbus Commands When a MODBUS command is used, the Modbus module translates it to the corresponding T2 register access protocol. MODBUS FUNCTION CODE T2 COMMAND 01 Read Coil Status DR Read Device/Register 02 Read Input Status DR Read Device/Register 03 Read Holding Register DR Read Device/Register 04 Read Inpu[...]

  • Page 13

    Page 7 5.2. Modbus Data Types and T2 Register Mapping This table shows how the differ ent Modbus data types are mapped into T2 registers. In other words, a Modbus master would reference the following Modbus register ranges to access the corresponding T2 PLC registers. For example, Modbus Holding Register 4352 will m ap to T2 register D 000, and Inp[...]

  • Page 14

    Page 8 Modbus – T2 Address mapping Example: Modbus Address T2 Address T2 Data Type 30000 XW000 Input Register 40001 YW001 Output Register 44352 D0000 Data Register Note: When dealing with I/O registers, make sure that the Modbus master is attempting to access only the I/O points that physically exist in the T2 system. For example, Holding Registe[...]

  • Page 15

    Page 9 6. Modbus Module Setup The Toshiba Modbus module has been used reliably as a Modbus slave for several years. First it was used on Toshiba’s EX100 Series PLCs and now on the T2 Series PLCs. Before it can function as intended however, all the DIP s witches must be proper ly set and all wiring connections must be correct. 6.1. Modbus Module D[...]

  • Page 16

    Page 10 Transmission Rate (Baud Rate): Select the combination of t he three switches "BR2", "BR1", and "BRO" for the desired communication speed. These are the 4th, 5th, and the 6th switches. Baud Rate BR2 BR1 BR0 19200 ON ON ON 9600 ON ON OFF 4800 ON OFF ON 2400 ON OFF OFF 1200 OFF ON ON 600 OFF ON OFF 300 OFF OFF ON [...]

  • Page 17

    Page 11 Parity Check: Select the parity check as odd, even or none. Use switches 7 and 8 to set the parity. PARITY PEN (7) EVN (8) NONE OFF ---- ODD ON OFF EVEN ON ON ASY and DLY switches: The ASY and DLY switches are not used on the EX10-MML11, and should be set to the “Off” position.[...]

  • Page 18

    Page 12 Example Configuration Settings: This section shows how to set the card up for network station address 2, 9600 baud, and no parity. 1) “ASY and DLY” Set these to the Off position. 2) "Station Address" • Set the Station number on the rotary switch to 2 . • Set the HAD switch to OFF because our address is less than 16. 3) &qu[...]

  • Page 19

    Page 13 4) "Parity check" For No Parity, the following settings are required. • PEN is off. • EVN is off. ASY DLY HAD BR2 BR1 BR0 PEN EVN OFF ON Switch settings for 9600 baud, no parity, and address less than 16.[...]

  • Page 20

    Page 14 6.2. Wiring Connection to the Modbus Module Sometimes it is necessary to convert from the standard RS485 to RS232 for connection to a Personal Computer. The wiri ng between the Modbus module and the converter must be set as follows: RS485 Converter Modbus Module TXA RXA RXA TXA TXB RXB RXB TXB SG SG Note: Different RS485 converters have dif[...]

  • Page 21

    Page 15 7. CPU Setup for the Modbus Module Two lines of ladder logic are necessary to configure a T2 CPU for use with the Modbus module. 1 Communications Priority: To insure uninterrupted communications between the CPU and the Modbus module, the communications priority bit S0158 must be set ON. 2. Initialization: To initia lize the Modbus module, w[...]

  • Page 22

    Page 16 8. Trouble Shooting The communication status LEDs can be used to verify correct operation of the Modbus module. During normal operation, the LED indicators flash as follows: • RXD LED : Flashes when the Modbus master sends a message to the EX10 -MML11. On a multi slave network, th is can also flash when when the master polls other slaves [...]

  • Page 23

    Page 17 9. Additional References Toshiba Corporation, Instruction Manual - EC300 Series Controller – ECBUS Transmission Interface Module – ML11 . 6F8A0613 4 th ed. Feb 1995. Tokyo, Japan. Toshiba Corporation, Computer Link Func tion Operation Manual . UM-TS03-E008, 3 rd ed. Aug. 1977. Tokyo, Japan. Gould Modicon, Modbus Protocol Reference Guide[...]

  • Page 24

    Page 2 TOSHIBA TOSHIBA INTERNATIONAL (EUROPE) LTD. 1 Roundwood Avenue Stockley Park, Uxbridge Middlesex UB11 1AR, UNITED KINGDOM Tel: 081 848 4466 Fax: 081 848 4969 E_mail nigels@toshibai.co.uk TOSHIBA INTERNATIONAL CORPORATION PTY. LTD . Unit 1, 9 Orion Road Lane Cove N.S.W. 2066, AUSTRALIA Tel: 02-428-2077 Telex: AA25192 E_mail: preston@toshiba.c[...]