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WAGO-I/O-SYSTEM 750 

Function Description 

33 

750-652 Serial Interface RS-232 / RS-485 

 

 

Manual 

 

Version 1.4.0  

 

 

5 

Function Description 

 

5.1 

Operating Modes for Serial Transmission 

In den  

In the operating modes for serial transmission, the I/O module allows 

communication with serial devices via RS-232, RS-485, RS-422 or DMX. 

The I/O module operates in these modes as a link between one of these 

standardized interfaces to the one side and the application or controller to the 

other side. 

Data transmission between the I/O module and serial devices is determined by the 

respective interface parameters, e.g. baud rate. 

Data transmission between the application and I/O module is controlled by the 

control and status bytes. 

 

5.1.1 

Transmit Data 

If data is transmitted via the I/O module to an RS-232, RS-485, RS-422 interface 

or in DMX mode, the application writes to the data bytes of the process image 

(output) per each part of the data. The application modifies the control bytes, so 

that they signal to the I/O module that new data has arrived. The I/O module 

receives the data sent to the output buffer and modifies the status bytes. Based on 

these modified status bytes, the application can again recognize that the data 

transfer was successful. Only when this feedback is present can the application 

transmit the next part of the data. 

The data transmission rates between the application and I/O module and between 

the I/O module and serial interface are normally not identical. 

If data transmission between the application and I/O module is faster than 

between the I/O module and serial interface, the output buffer in the I/O module 

fills up faster than it clears. If the application transmits continuously, the output 

buffer queue even rises when data is continuously transmitted on the serial 

interface. If the output buffer is full, the application has to wait for space to be 

available in the output buffer by transmitting to the serial interface. 

If data transmission between application and I/O module is slower than between 

I/O module and serial interface, the output buffer in the I/O module fills up faster 

than it clears. Transmission of data on the serial interface is repeatedly interrupted 

even if the application continuously transmits. 

5.1.1.1  Continuous Transmission 

The I/O module can be set either to transmit data in the output buffer to the serial 

interface immediately or to start the transmission process only after released by 

the application. The latter is useful when data has to be transmitted on the serial 

Содержание 750-652

Страница 1: ...WAGO I O SYSTEM 750 Manual 750 652 Serial Interface RS 232 RS 485 Configurable Version 1 4 0...

Страница 2: ...0 571 8 87 5 55 Fax 49 0 571 8 87 85 55 E Mail support wago com Every conceivable measure has been taken to ensure the accuracy and completeness of this documentation However as errors can never be f...

Страница 3: ...2 Power Jumper Contacts Field Supply 20 3 2 3 CAGE CLAMP Connectors 22 3 3 Display Elements 23 3 4 Operating Elements 24 3 5 Schematic Diagram 24 3 6 Technical Data 25 3 6 1 Device Data 25 3 6 2 Supp...

Страница 4: ...ize 48 8 1 4 Parameter Range 49 8 1 5 Setting the RS 232 RS 485 Serial Interface 50 8 2 Configuration and Parameterization via GSD for PROFIBUS DP and PROFINET IO 51 8 3 Data Transfer 51 8 3 1 Example...

Страница 5: ...ding to ANSI ISA 12 12 01 72 11 Appendix 73 11 1 Configuration and Parameterization via GSD for PROFIBUS DP and PROFINET IO 73 11 1 1 Configuration of the RS 232 RS 485 Interface 73 11 1 1 1 PROFIBUS...

Страница 6: ...information given in this documentation applies to listed variants The I O module 750 652 shall only be installed and operated according to the instructions in this manual and in the manual for the u...

Страница 7: ...ates a moderate risk potentially hazardous situation which if not avoided could result in death or serious injury Personal Injury Indicates a low risk potentially hazardous situation which if not avoi...

Страница 8: ...Documentation WAGO I O SYSTEM 750 750 652 Serial Interface RS 232 RS 485 Manual Version 1 4 0 Additional Information Refers to additional information which is not an integral part of this documentatio...

Страница 9: ...ta files are marked in italic type e g C Program Files WAGO Software Menu Menu items are marked in bold letters e g Save A greater than sign between two names means the selection of a menu item from a...

Страница 10: ...iliar with the current norms and guidelines for the devices and automated environments All changes to the coupler or controller should always be carried out by qualified personnel with sufficient skil...

Страница 11: ...the system in a housing or switch cabinet 2 1 4 Technical Condition of Specified Devices The devices to be supplied ex works are equipped with hardware and software configurations which meet the indi...

Страница 12: ...equipment and fixtures to authorized qualified staff only by means of specific keys or tools Replace defective or damaged devices Replace defective or damaged device module e g in the event of deforme...

Страница 13: ...onnection lines Avoid reverse polarity of data and power supply lines as this may damage the devices involved Avoid electrostatic discharge The devices are equipped with electronic components that may...

Страница 14: ...s WAGO I O CHECK version 3 5 3 or higher NOTE The default operating mode is RS 485 half duplex The default data transmission rate is 9600 baud 1 start bit 8 data bits and 1 stop bit are sent There is...

Страница 15: ...n section Connecting Devices Connection Example s Multi color LEDs indicate the operating status and the trouble free internal bus communication as well as the status of the signal transmission The me...

Страница 16: ...mmable fieldbus controller 750 833 14 I O IPC 758 870 000 111 05 758 870 000 131 05 758 874 000 111 05 758 875 000 111 05 758 876 000 111 05 ETHERNET Fieldbus couplers 750 341 07 750 342 17 750 352 02...

Страница 17: ...tem Fieldbus couplers controllers Item No Firmware status Programmable fieldbus controller 750 837 14 750 838 14 I O IPC 758 870 000 112 05 758 875 000 112 05 KNX Programmable fieldbus controller 750...

Страница 18: ...Figure View Pos Description Details See Section 1 Marking possibility with Mini WSB 2 Status LEDs Device Description Display Elements 3 Data contacts Device Description Connectors 4 CAGE CLAMP connec...

Страница 19: ...ts which are available as self cleaning gold spring contacts Figure 2 Data Contacts Do not place the I O modules on the gold spring contacts Do not place the I O modules on the gold spring contacts in...

Страница 20: ...acts and those on the right side as spring contacts Figure 3 Power Jumper Contacts Table 6 Legend for Figure Power Jumper Contacts Contact Type Function 1 Spring contact Potential transmission Uv for...

Страница 21: ...terface RS 232 RS 485 Manual Version 1 4 0 Use supply modules for ground earth The I O module has no power jumper contacts for receiving and transmitting the earth potential Use a supply module when a...

Страница 22: ...uracy and interference immunity specified for the respective I O module can be achieved even in the presence of interference acting on the signal cable Figure 4 CAGE CLAMP Connectors Table 7 Legend fo...

Страница 23: ...xD present 1 Red Signal transmission RxD present 1 but some characters received are defective parity data frame or overrun error has occurred 3 D Transmission status OFF No transmission error Green Ou...

Страница 24: ...h baud rates the pulses are so short that the on state cannot or can hardly be detected with the naked eye 2 XON XOFF data flow control active 3 Defective characters are not transmitted by the I O mod...

Страница 25: ...onfigurable RS 232 RS 485 half duplex RS 422 full duplex Data exchange RS 4221 DMX half duplex 250k1 Data flow control RTS CTS2 depending on mode XON XOFF3 Baud rate 300 115200 baud Data width interna...

Страница 26: ...odules Table 15 Technical Data Data Contacts Data contacts Slide contact hard gold plated self cleaning 3 6 6 Climatic Environmental Conditions Table 16 Technical Data Climatic Environmental Condition...

Страница 27: ...anted to the basic version and all variants of 750 652 I O modules T V 07 ATEX 554086 X I M2 Ex d I Mb II 3 G Ex nA IIC T4 Gc II 3 D Ex tc IIIC T135 C Dc IECEx TUN 09 0001 X Ex d I Mb Ex nA IIC T4 Gc...

Страница 28: ...rographic Agency GL Germanischer Lloyd Cat A B C D EMC 1 3 8 Standards and Guidelines All variations of 750 652 I O modules meet the following requirements on emission and immunity of interference EMC...

Страница 29: ...nd received will be stored in up to 46 input and output bytes D0 D45 Data flow is controlled with control and status bytes C0 and S0 or C1 and S1 The input bytes form the memory area for up to 46 char...

Страница 30: ...Bit 2 Bit 1 Bit 0 RC BUF_F IL2 IL1 IL0 IA RR TA TA Transmit acknowledge RR Receive request IA Initialization acknowledge IL0 Input length number of characters received that are available in the input...

Страница 31: ...ost during receipt 1 Only applies to flow control RTS with lead follow on time Status of the CTS input Bit 4 is 0 CTS active Bit 4 is 1 CTS inactive For evaluation of the bits of the status byte that...

Страница 32: ...Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 RC X X X RCVT CHK 0 LGT LGT The length of the telegram last received does not match the PI size CHK Wrong checksum received RCVT No error free transmis...

Страница 33: ...application can again recognize that the data transfer was successful Only when this feedback is present can the application transmit the next part of the data The data transmission rates between the...

Страница 34: ...Receipt If there is data in the input buffer the I O module can be set either to begin transmitting data to the application immediately or to wait to receive additional data If the I O module begins...

Страница 35: ...CTS the I O module stops transmitting data to the serial interface when CTS is set The I O module continues transmitting data when CTS is reset When data is received the I O module monitors input buff...

Страница 36: ...ion and receiving is thus possible In this mode the I O module supports flow control for the serial interface using the XON XOFF protocol see chapter Flow Control Using XON XOFF Protocol 5 1 6 DMX Ope...

Страница 37: ...n the opposite side are again represented as data bytes in the process image of the local I O module The sequence of data bytes remains unchanged during transmission The cycle in which process data is...

Страница 38: ...I O modules with power contacts blade contacts cannot be linked to I O modules with fewer power contacts Risk of injury due to sharp edged blade contacts The blade contacts are sharp edged Handle the...

Страница 39: ...module so that the tongue and groove joints to the fieldbus coupler controller or to the previous or possibly subsequent I O module are engaged Figure 8 Insert I O Module Example 2 Press the I O modu...

Страница 40: ...85 Manual Version 1 4 0 6 2 2 Removing the I O Module 1 Remove the I O module from the assembly by pulling the release tab Figure 10 Removing the I O Module Example Electrical connections for data or...

Страница 41: ...y one conductor may be connected to each CAGE CLAMP Do not connect more than one conductor at one single connection If more than one conductor must be routed to one connection these must be connected...

Страница 42: ...re 12 Point to point Connection Operating Mode RS 232 with RTS CTS Data Flow Control In the RS 232 operating mode point to point connection terminal resistors are not necessary The cable length can be...

Страница 43: ...th shorter line lengths it is not necessary to use the terminal resistors The receiver built into the I O module has a defined output state if both inputs are not connected and the data line has a sho...

Страница 44: ...rminated with a terminal resistor Generally a passive resistance is used by connecting the signal lines via one 100 120 resistor apiece to both bus ends For communication between 2 or several 750 652...

Страница 45: ...n this mode the contacts of the I O modules to connect are connected to each other crosswise In the Data Exchange operating mode point to point connection a twisted pair cable should be used at least...

Страница 46: ...gher The software s basic functionality is described separately in the WAGO I O CHECK documentation Component damage due to incorrect voltage level Incorrectly selected voltage levels can destroy the...

Страница 47: ...Toolbar on the Configuration Dialog The toolbar contains the following buttons Figure 18 Toolbar Table 25 Toolbar Button Function Description Exit Closes the active window If you have changed setting...

Страница 48: ...e process image size Note that with changes to the process data length the structure of the process image changes and if necessary changes to the configuration of the superior controller may be necess...

Страница 49: ...scribed in more detail in the chapter Function Description Table 27 Parameter Range Selection box Possible settings Operating Mode RS 232 RS 485 half duplex RS 422 full duplex data exchange RS 4224 DM...

Страница 50: ...rComm lib can be temporarily overwritten by the controller Mode Baud rate Data bits parity number of stop bits Flow control Continuous send The following values are not available if settings should be...

Страница 51: ...tched immediately according to the operating mode Input operating mode In case of a change of operating mode a warning appears that points out that it may be necessary to change the wiring 8 2 Configu...

Страница 52: ...and I O module can take place simultaneously The initialization request is executed with priority and immediately ends the transmission and receipt of data Reset initialization bit The initialization...

Страница 53: ...ed Table 32 Character string Hello World Control byte 0 Control byte 1 Output byte 0 Output byte 1 0011 0000 0000 0001 H 0x48 a 0x60 Output byte 2 Output byte 3 Output byte 4 Output byte 5 1 0x6C 1 0x...

Страница 54: ...t byte 0 Input byte 1 0 xxx X 00x 0XXX 1XXX XX XX There are no receive data available 0XX1 001X 0XXX 1XXX W A The data is available in the input bytes After the 2 characters have been processed RA is...

Страница 55: ...s the acceptance of the data Control byte 0 Control byte 1 0110 1000 0XXX X101 Controller takes bit 0 TR of the control byte 0 back Status byte 0 Status byte 1 0XXX X0X0 0XXX 0XXX I O module begins wi...

Страница 56: ...e 0 Control byte 1 0110 1001 0XXX X101 Controller fills the output buffer with another 46 bytes of data Status byte 0 Status byte 1 0XXX X0X1 0000 0XXX I O module confirms the acceptance of the data S...

Страница 57: ...art byte always 0 D1 Data byte 1 D1 Data byte 1 DMX channel 1 D2 Data byte 2 D2 Data byte 2 DMX channel 2 D5 Data byte 5 D5 Data byte 5 DMX channel 5 24 bytes D6 Data byte 6 D6 Data byte 6 DMX channel...

Страница 58: ...the data part of the process image for transmission of status information Use bits 0 1 and 2 of the first data byte for example Use bit 0 as the ON signal on both sides 1 Describe bit 0 in the process...

Страница 59: ...as interrupted Check the configuration of the interface parameters Use a shielded cable Change wire routing Shorten cable Eliminate interference Overflow Data loss has occurred Reduce baud rate 9 2 Da...

Страница 60: ...ment is designed for use in Zone 2 hazardous areas The following sections include both the general identification of components devices and the installation regulations to be observed The individual s...

Страница 61: ...85 Manual Version 1 4 0 10 1 Marking Configuration Examples 10 1 1 Marking for Europe According to ATEX and IEC Ex Figure 21 Side Marking Example for Approved I O Modules According to ATEX and IECEx F...

Страница 62: ...of the enclosure without a dust layer Mining I Equipment group Mining M2 Category High level of protection Ex Explosion protection mark d Mb Type of protection and equipment protection level EPL Flame...

Страница 63: ...63 750 652 Serial Interface RS 232 RS 485 Manual Version 1 4 0 Figure 23 Side Marking Example for Approved Ex i I O Modules According to ATEX and IECEx Figure 24 Text Detail Marking Example for Appro...

Страница 64: ...nt protection level EPL protection by enclosure ia Da Type of protection and equipment protection level EPL associated apparatus with intrinsic safety circuits for use in Zone 20 ib Db Type of protect...

Страница 65: ...G Category 3 Zone 2 equipment containing a safety device for a category 2 Zone 1 equipment Ex Explosion protection mark nA Gc Type of protection and equipment protection level EPL Non sparking equipme...

Страница 66: ...e for I O Modules According to NEC 500 Figure 26 Text Detail Marking Example for Approved I O Modules According to NEC 500 Table 47 Description of Marking Example for Approved I O Modules According to...

Страница 67: ...RS 232 RS 485 Manual Version 1 4 0 10 2 Installation Regulations For the installation and operation of electrical equipment in hazardous areas the valid national and international rules and regulation...

Страница 68: ...e may only be actuated when explosive atmosphere can be excluded 4 The connecting and disconnecting of the non intrinsically safe circuits is only permitted during installation for maintenance or for...

Страница 69: ...60079 0 and EN 60079 1 and the degree of protection IP64 The compliance of these requirements and the correct installation into an enclosure or a control cabinet of the devices shall be certified by a...

Страница 70: ...e may only be actuated when explosive atmosphere can be excluded 4 The connecting and disconnecting of the non intrinsically safe circuits is only permitted during installation for maintenance or for...

Страница 71: ...60079 0 and IEC 60079 1 and the degree of protection IP64 The compliance of these requirements and the correct installation into an enclosure or a control cabinet of the devices shall be certified by...

Страница 72: ...tors Only for use in LAN not for connection to telecommunication circuits G WARNING Use Module 750 642 only with antenna module 758 910 H For Couplers Controllers and Economy bus modules only The inst...

Страница 73: ...a type Instances Inp Outp 75x 652 ser interf 8 bytes 75x 652 Unsigned8 2 OctetString 6 1 1 75x 652 ser interf 24 bytes Unsigned8 2 OctetString 22 75x 652 ser interf 48 bytes Unsigned8 2 OctetString 46...

Страница 74: ...rial Interface Apart from the RTS lead and follow on time the GSD file can be used to provide the I O module on the PROFIBUS DP and PROFINET IO fieldbus coupler with all operating parameters Figure 27...

Страница 75: ...etween operating modes that RS 232 and RS 485 use different voltage levels Switch off connected devices before changing operating modes Make sure that devices you connect support the voltage level of...

Страница 76: ...ata Bits 7 Parity none Parity none odd Parity odd straight Parity straight Stop bits 1 Stop Bits 1 2 Stop Bits 2 Flow control deactivated Flow Control disabled XON XOFF Flow Control XON XOFF RTS CTS F...

Страница 77: ...ion Channel diagnostics Channel x x 0 0 lock The fieldbus coupler signals a diagnosis if the I O module reports the event Overflow input buffer Diagnostics reported by the I O module do not lead to th...

Страница 78: ...RS 422 Operating Mode 44 Figure 16 Point to point Connection Between Two Nodes 45 Figure 17 Parameter Dialog 46 Figure 18 Toolbar 47 Figure 19 Process Image Size 48 Figure 20 Parameter Range 49 Figur...

Страница 79: ...Byte S0 30 Table 20 Control Byte C1 30 Table 21 Status Byte S1 31 Table 22 Process Data in Data Exchange Mode 31 Table 23 Control Byte C0 32 Table 24 Status Byte S0 32 Table 25 Toolbar 47 Table 26 PI...

Страница 80: ...roved Ex i I O Modules According to ATEX and IECEx 64 Table 47 Description of Marking Example for Approved I O Modules According to NEC 500 66 Table 48 Configuration 73 Table 49 Configuration 73 Table...

Страница 81: ...WAGO I O SYSTEM 750 81 750 652 Serial Interface RS 232 RS 485 Manual Version 1 4 0...

Страница 82: ...WAGO Kontakttechnik GmbH Co KG Postfach 2880 D 32385 Minden Hansastra e 27 D 32423 Minden Phone 05 71 8 87 0 Fax 05 71 8 87 1 69 E Mail info wago com Internet http www wago com...

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