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COMM UNICATION INTER FACE  CO NNECTIO N

FIELDBUS

1TG C908004M0 201

21

5.4. Fieldbus

5.4.1. Modbus RTU Topology

There are three options for MODBUS RTU interface (Serial 2 Sub-D connector) available for
the MNS Digital Gateway which can be selected by parameter in MNavigate tool: RS 232, RS
422 and RS 485.

Max. cable length varies from 15m (RS232) up to 1200m (RS485/422) depending on transmis-
sion speed and repeater type in use. Cable length can be extended using fiber optic modems
which in addition also galvanically isolate the communication, prevent shield currents and
provides best option for EMC immunity.

The serial port interface of the MNS Digital Gateway is not galvanically isolated. To
achieve this it is recommended to use 3rd party products.

5.4.1.1. RS232

Allows only a simple point to point topology between Master and Slave. The maximum dis-
tance according to the standard is 15 meters.

Figure 15 MNS Digital Gateway RS232 connection via Serial 2

Summary of Contents for M101

Page 1: ...DISTRIBUTION SOLUTIONS MNS Digital with M10x Interface Manual Modbus...

Page 2: ...ect these products the network its system and interfaces against security breaches unauthorized access interference intrusion leakage and or theft of data or information ABB performs functionality tes...

Page 3: ...20 5 4 Fieldbus 21 5 4 1 Modbus RTU Topology 21 5 4 2 Modbus TCP Topology 24 6 Redundancy 25 6 1 Redundant Architecture 25 6 2 Redundancy Configuration 26 6 2 1 RedundantMNS Digital Gateway connectio...

Page 4: ...eset Multiple Register 42 8 9 Restrictions 42 8 9 1 General 42 8 9 2 Modbus RTU 42 8 10 Exception Code Handling 43 9 Data Mapping 44 9 1 User Data Map 44 9 2 Default Data Map 44 9 2 1 Monitoring Input...

Page 5: ...NS Digital Gateway RS422 connection via Serial 2 22 Figure 17 MNS Digital Gateway RS485 connection via Serial 2 23 Figure 18 Example for RS485 bus termination and biasing 23 Figure 19 MNS Digital Gate...

Page 6: ......

Page 7: ...tion for function code 03 and 04 41 Table 17 Byte representation for Float 41 Table 18 Byte representation for Float Big Endian 41 Table 19 Default Modbus Map Life Bit of M10x M 45 Table 20 Default Mo...

Page 8: ......

Page 9: ...rmation It also includes Tip icons to point out useful hints to the reader The corresponding symbols should be interpreted as follows The electrical warning icon indicates the presence of a hazard tha...

Page 10: ...net Ethernet is a local area network LAN technol ogy The Ethernet standard specifies the physical medium access control rules and the message frames Event An event is a status transition from one stat...

Page 11: ...ation protocol MODBUS TCP IP Fieldbus communication protocol based on Ethernet hardware Motor Starter Consists of motor controller and electrical com ponents to control and protect a motor part of Mot...

Page 12: ...ion in Control Network through Ethernet Switchgear Bus Network Term used to describe the internal switchgear communication network between MNS Digital Gateway and M10X TCP IP Transmission Con trol Pro...

Page 13: ...us Implementation 1TNC911204 M10x M Control System Integration Guide 1TGC901101M0202 MNS Interface Manual Web Interface 1TGC908001M0201 ABB Ability Condition Monitoring for electrical systems user man...

Page 14: ...s as well as to the MNS Digital Edge Gateway which provides condition monitoring features and functions as well as edge connectivity to ABB Ability cloud based solutions Figure 1 MNS Digital Gateway O...

Page 15: ...ture Table 1 MNS Digital Gateway Modbus Hardware For communication to M10X MNS Digital Gateway is connected via RS485 with Modbus RTU protocol As one segment of Modbus RTU is only able to support 32 d...

Page 16: ...The MODBUS communication protocol is implemented within the MNS Digital Gateway to enable MNS Digital to provide interface possibilities to process control systems or any other external systems that...

Page 17: ...the MNS Digital Gateway the transmission mode is also limited to RTU or TCP Other characteristics are user selectable These include a choice of transmission medium baud rate and character parity numb...

Page 18: ...teway deals with either type of error as specified in MODBUS specification The most frequent cause of communication error is noise unwanted electrical signals in a communication channel These signals...

Page 19: ...Power Supply 0V CF CARD CF Card CF card is protected against unintentional removal after closing the flap and connect ing the power supply PORTS LAN 1 LAN 1 Interface Modbus TCP LAN 1 LED left green L...

Page 20: ...dependent see section LED in dication page 60 LED 4 Application dependent see section LED in dication page 60 LED 5 Application dependent see section LED in dication page 60 LED 6 DCS Communication a...

Page 21: ...g The MNS Digital Gateway is installed inside the switchgear on a MNS Digital Gateway mount ing kit part ID 1TNA704001R0003 which is housed in an 8E withdrawable module compart ment of the MNS cubicle...

Page 22: ...ion of the MNS Digital Gateway in the switchgear environment The CF card slot is located on the MNS Digital Gateway front side To remove or insert the CF card the power supply connector has to be remo...

Page 23: ...e required as terminators for both end of each communication link The MNS Digital Gateway has an inbuilt terminating resistor on its serial port which acts as a first point while for the last point on...

Page 24: ...h a Laptop with MCUsetup software tool installed For further detail on changing the setting refer to M10x User Guide document In addition to the terminating resistor it is also required to install a s...

Page 25: ...ess e g through Router and Firewall This is a project specific configuration Contact always the local network administrator and review the project specific requirements If managed switches or routers...

Page 26: ...MNS Digital Gateway and MNS Digital Edge Gateway It is recommended that a managed network switch is used to connect the MNS Digital Gateway to the PCS or PLC The switch is not part of the MNS assembl...

Page 27: ...component is installed which can provide the time signal as NTP Server Such a NTP Server can be a computer or network server as well as Ethernet switches As an option this NTP Server can be equipped...

Page 28: ...s NTP Client Time Sync mode NTP and their internal clock is synchronized by the NTP Server MNS Digital Gateway In case of a power down the MNS Digital Gateway buffers the system time RTC for about 3 h...

Page 29: ...smis sion speed and repeater type in use Cable length can be extended using fiber optic modems which in addition also galvanically isolate the communication prevent shield currents and provides best o...

Page 30: ...TGC908004M0201 5 4 1 2 RS422 Allows simple point to point topology between Master and Slave The maximum distance ac cording to the standard is 1000 meters depending on communication speed Figure 16 MN...

Page 31: ...depending on communication speed Figure 17 MNS Digital Gateway RS485 connection via Serial 2 5 4 1 4 Termination The RS485 bus must be terminated at both end The MNS Digital Gateway does not provide...

Page 32: ...nnector on the MNS Digital Gateway For a direct connection a CAT 5 or higher cross over cable is to be used For a network with multiple slaves via a network switch the standard CAT 5 patch cables are...

Page 33: ...Backup MNS Digital Gateway is synchronized using a redundant link cable A redundant system does can cover single system failures Following theoretical failure situa tions are covered by a redundant sy...

Page 34: ...wo DCS PLC Master where each is connected to one MNS Digital Gate way see example Figure 21 6 2 1 Redundant MNS Digital Gateway connection Both MNS Digital Gateway must be connected via a RS232 Null M...

Page 35: ...nloaded to both the Primary and Backup MNS Digital Gateway to become effective In a project with multiple MNS Digital Gateway the majority of the MNS Digital Gateway pa rameter are identical To ease t...

Page 36: ...NS Digital Gateway is different e g Primary 192 168 200 100 Backup 192 168 200 101 The same subnet mask is used because both Ethernet ports are connected to the same Ethernet network for MView and MNa...

Page 37: ...hange over Redundancy error indi cated Power loss of backup MNS Digital Gateway No change over Redun dancy error indicated Problems in redundancy setup No change over possible Redundancy error indi ca...

Page 38: ...ateway before without user interaction While redirecting the MView shows the following window Prior to the re direction the background in MView changes to yellow to indicate that current Web Interface...

Page 39: ...MNS Digital Gateway Fieldbus communication related parameter e g comm speed or slave address can be change during runtime of MNS Digital Gateway Parameter Default Value Range Remarks IP Address LAN 2...

Page 40: ...the MNS Digital Gateway are configured with the MNavigate software tool Figure 27 IP Address Settings Figure 28 Time Sync Settings MNS Digital Gateway does not support DHCP service to get automatic n...

Page 41: ...cal network administrator is to be consulted for correct settings If it is not possible to communicate to the MNS Digital Gateway please refer to the trouble shooting section in this document or the M...

Page 42: ...hich acts as a check on a set of binary values It needs to be en sured that the Parity Bit is also con figured the same as in M10x com munication setting Stop Bit 1 1 2 Bits bit which indicate the end...

Page 43: ...n None Even Odd Used for Error checking Stop bit 1 1 or 2 Required if no Parity check is used PLC Time Out enable No Yes No Activates PLC time out PLC Failsafe Time Out 10 1 100 Delay until Failsafe i...

Page 44: ...ator Broadcast Address LAN1 192 168 100 255 Calculated automatically Default Gateway LAN1 0 0 0 0 Settings according to network ad ministrator Slave address 247 1 247 RTU Slave Address Port 502 502 TC...

Page 45: ...the PCS or PLC MODBUS master supports such configura tion 7 6 Failsafe In circumstances where a disturbance in the MODBUS communication network needs to be monitored it is possible to select a Failsaf...

Page 46: ...nfigured before start up Any change of configuration settings on the MNS Digital Gateway requires restart of the MNS Digital Gateway During MNS Digital Gateway restart all communication on the switchg...

Page 47: ...multiple Registers Write of several successive words into register file Table 14 Function Codes The MNS Digital Gateway is a standard MODBUS slave device The PLC or PCS master initiates the communica...

Page 48: ...tion Control Access Information Alarms Trips The valid address range 10001 19999 8 3 Function Code 03 Read Holding Registers With function code 03 the control system can read the registers that can st...

Page 49: ...f float value is as follows Bit Number 15 8 7 0 Register n Data Low High Data Low Low Register n 1 Data High High Data High Low Table 18 Byte representation for Float Big Endian 8 6 Function Code 06 P...

Page 50: ...the command con trol 8 9 Restrictions 8 9 1 General To ensure optimal performance a maximum of 60 modbus requests per second is allowed According Modbus standard MNS Digital Gateway supports up to 16...

Page 51: ...a query could not be served Exception code 1 Illegal function A Function Code was received that is not supported Exception code 2 Illegal data address A register address is out of the valid range Exce...

Page 52: ...This is a proprietary tool for ABB to program the MODBUS reg isters according to customer requirements 9 2 Default Data Map 9 2 1 Monitoring Inputs from M10x M Monitoring of the M10x M data handled by...

Page 53: ...comm ok 2 10002 2 Life Bit M10x M 2 M10x M 2 is available comm ok 2 10003 3 Life Bit M10x M 3 M10x M 3 is available comm ok 2 10004 4 Life Bit M10x M 4 M10x M 4 is available comm ok 2 10005 5 Life Bi...

Page 54: ...able 2 11006 1 Alarm 1 Any Alarm condi tion of protection or supervision functions 2 11007 1 New Trip 1 Any Trip condition of the protection or supervision functions 2 11008 1 Test 1 Main switch set t...

Page 55: ...of M10x M is on 2 11018 1 DI9 1 Digital Input 9 of M10x M is on 2 11019 1 DI10 1 Digital Input 10 of M10x M is on 2 11020 1 DI11 1 Digital Input 11 of M10x M is on 2 11021 1 DI12 1 Digital Input 12 o...

Page 56: ...28 Test 1 Main switch set to test position Motor cannot start 2 13676 128 HW local 1 Control Access is selected to hardwired I O from Local Re mote input on M10x M 2 13677 128 Bus local 1 Control Acce...

Page 57: ...Remarks 2 13684 128 DI8 1 Digital Input 8 of M10x M is on 2 13685 128 DI9 1 Digital Input 9 of M10x M is on 2 13686 128 DI10 1 Digital Input 10 of M10x M is on 2 13687 128 DI11 1 Digital Input 11 of M...

Page 58: ...2Byte Time before M10x M will trip the motor only available if TOL protection func tion is used 3 40004 1 Time to reset Unsigned Int 2Byte Time required be fore reset allowed only available if TOL pr...

Page 59: ...status 2Byte 3 4100 3 Extended status 2Byte 3 41253 127 Extended status 2 Byte 3 41254 127 Extended status 2 Byte 3 41255 128 Extended status 2 Byte 3 41256 128 Extended status 2 Byte Table 22 Defaul...

Page 60: ...is present Bit 2 Bit 3 Bit 4 Failsafe Set when Failsafe mode is active Bit 5 Reserved Bit 6 Reserved Bit 7 Reserved Table 24 Extended Status Byte 2 The content of the Extended Status Byte 3 contains...

Page 61: ...scription Remark Bit 0 HW Local M10x M accepts control commands from the hardwired inputs on M10x M when the respective Local control input is set to true Bit 1 Reserved Bit 2 BUS Local M10x M accepts...

Page 62: ...40001 49999 Word registers The following default Modbus registers must be used for writing control commands to the M10x via the MNS Digital Gateway Modbus Function Code Modbus Register Device Number M...

Page 63: ...cal control 0x2104 DCS allows control via local HMI Stop Stop Open 0x0201 Stops the M10x M Opens contactor K1 for Contactor Feeder ap plication Start Start CW Close CF Open Act Start Start Clockwise C...

Page 64: ...value Function 16 Commands Are sent only when the command bit is toggled either 0 to 1 or 1 to 0 The following tables detail the registers bit functionalities and show examples of utilizing Modbus bit...

Page 65: ...icates Redundancy er ror Table 32 Redundant data for monitoring by the Modbus master Modbus Function Code Modbus Register Modbus Register Name Format Description Remarks 6 16 44001 Force to changeover...

Page 66: ...and operation is possible via MView local operation panel in switchboard or via web interface similar to MView Hardware Local M10x M switches to the Hardware Local mode and opera tion is possible only...

Page 67: ...sible for the DCS or MView to take control when the M10x M is set to HW Local Recommended procedure for sending control commands for a motor starter 1 Set the M10x M to Remote with the command 0x2100...

Page 68: ...tal Gateway is Primary in Dual Redundant configuration MNS Digital Gateway is running Ok LED 6 DCS communication active MNS Digital Gateway is running Ok LED6 DCS communication active LED 8 MNS Digita...

Page 69: ...tal Gateway error MNS Digital Gateway is not able to create internal database Please reboot the MNS Digital Gateway If that doesn t resolve the problem use MNavigate to download the MNS Digital Gatewa...

Page 70: ...the MNS Digital Gateway configuration or download Mapping file again ref to MNavigate Help or MNavigate Manual General DCS fault only available if con figured See above LED 8 MNS Digital Gateway is P...

Page 71: ...configuration is correct use a ping command to verify that the MNS Digital Gateway is reachable Open a command window on the PC Start Run then type in cmd and click Enter Enter the ping command with t...

Page 72: ...tal Gateway Check if the correct Modbus RTU Cable connection and termination are all in line with the requirements detailed in the Serial Link connections section Check if the Slave address parameters...

Page 73: ...Revision History Rev Page Change Description Date Initial all Initial release 2018 05 09 EPDS HE...

Page 74: ...Visit us http www abb com mns Document Number 1TGC908004M0201 Rev M0201...

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