Murdoch University Engineering Thesis. Appendix XII. Profibus PA System Configuration Instructions

Transcription

1 Appendix XII Profibus PA System Configuration Instructions Author: Hao Xu Page: p8 - p Last modified: // This is part of the Engineering Thesis WinCC SCADA System via Profibus & OPC by Hao Xu. 8 P a g e

2 Preface This configuration instruction provides a comprehensive description about the operations and configurations of DP/PA coupler, Levelflex M FMP and Deltabar S PMD. The contents are summarized as follows: DP/PA coupler operation instruction DP/PA coupler slave module description DP/PA coupler telegram structure DP/PA coupler communication diagnostic DP/PA coupler slave module data exchange sample code Levelflex M FMP operation instruction Levelflex M FMP slave module description Levelflex M FMP telegram structure Levelflex M FMP communication diagnostic Levelflex M FMP slave module data exchange sample code Deltabar S PMD operation instruction Deltabar S PMD slave module description Deltabar S PMD telegram structure Deltabar S PMD communication diagnostic Deltabar S PMD slave module data exchange sample code TIA Portal communication configuration Prerequisite Background knowledge of PLC operations Background knowledge of ladder logic diagram Background knowledge of basic electric circuit Background knowledge of Profibus communication Completion of Appendix V S- PLC & RS8 Repeater configuration instructions Resources Levelflex M FMP level transmitter Deltabar S PMD pressure transmitter Tank with appropriate height Tank with bottom outlet DP/PA coupler S- PLC with DP interface CP Profibus interface PCI card TIA Portal configuration software Profibus cable Profibus DP connector Profibus PA M connector (Optional) MPI adaptor (Optional) 8 P a g e

3 DP/PA Coupler (Refer to DP/PA Coupler section in the thesis report for an overview of the functions and some background information) The specifications of DP/PA coupler are shown in Table. Specification Transmission speed over DP. kbaud Transmission speed over PA. kbaud Bus protocol Profibus DP Rated supply voltage V DC (. 8.8V) Output voltage for PA section 9V DC Output current for PA section ma Table : Specification of DP/PA coupler [9] DP/PA coupler has an internal bus termination switch. It must be turned on to prevent the signal reflection on its end. If this internal termination is not used, an external termination must be wired up. DIP Switches The assignments of the DIP switches are shown in Table. The Ring redundancy DIP switch needs to be switched on while using ring redundancy. Otherwise set it to coupler redundancy. DIP switch Ring 8 Address value Ring/coupler redundancy Table : DIP switch assignments of DP/PA coupler [9] The Profibus address is determined by the DIP switch setting and the new Profibus address will take effect after restart. 8 P a g e

4 Profibus Communication First of all, connect PLC and DP/PA coupler with a Profibus connector and also make sure the Profibus signal is terminated properly on each end of the network. Make sure GSD file SI8.gsd is installed in TIA Portal, then locate the DP/PA coupler station in TIA Portal Hardware Catalog (Figure 9). Figure 9: DP/PA coupler station in Hardware Catalog in TIA Portal If the master Profibus network has been established earlier, drag the DP/PA coupler station into the Network view and join it into the Profibus subnet (Figure 9). Figure 9: Assign DP/PA coupler to the master PLC in TIA Portal Double click the Profibus master connection, under Properties tab, in the PROFIBUS section, change the Transmission speed to. (.) kbps as shown in Figure 98. Figure 98: Profibus network transmission speed in TIA Portal Assign a Profibus address to DP/PA coupler station based on the DIP switches. (Refer to Table for setting Profibus address for DP/PA coupler) 88 P a g e

5 The current slave module is on the module rack by default and cannot be removed as shown in Figure 99. Figure 99: Current slave module in the module rack in TIA Portal The DP/PA coupler cannot perform standalone operation, therefore, one or more PA instruments need to be connected to the DP/PA coupler and also configured in TIA Portal. (Refer to Levelflex M FMP or Deltabar S PMD section for PA instruments configuration) 89 P a g e

6 Slave Modules (Refer to Slave Modules section in the thesis report for some background) Current The current slave module shows the current on the equipotential bonding line. (Refer to Sample Code section for some data exchange examples) Voltage The voltage slave module displays the voltage value on the equipotential bonding line. This module is not deliverable on the DP/PA coupler standalone mode. [8] (Refer to Sample Code section for some data exchange examples) Data Structure There is a fixed structure for all the slave modules to represent data. The first bytes (Table 8 & Table 9) are the data bytes and the th byte is the status byte (Table ). Data Byte Byte Byte VZ Exponent Fraction Table 8: DP/PA coupler slave module data structure part [8] Byte Byte Fraction Table 9: DP/PA coupler slave module data structure part [8] The equation to obtain the actual measured value is: Status Byte Measured Value = ( ) VZ (Exponent ) ( + Fraction) Equation : DP/PA coupler slave module actual value conversion equation [8] Status code Device status Description Bad Bad (non-specific). Uncertain Uncertain (initial value). Bad Short circuit/wire brake/bad signal level. Bad Lower limit violated (maintainence alarm). Bad Upper limit violated (maintenance alarm). 8 Uncertain Parameter error. 9 Uncertain Lower limit violated (maintenance demanded). A Uncertain Upper limit violated (maintenance demanded). 8 Good OK. 8 Good Lower limit violated. 8 Good Upper limit violated. Table : DP/PA coupler slave module status code description [8] 9 P a g e

7 Diagnostic SF (red): Batch error. BF (red): Bus fault. DP (yellow): Profibus DP monitoring. PA (yellow): Profibus PA monitoring. ACT (yellow): DP/PA coupler activated in PA redundancy mode. ON (green): V power supply. SF BF DP PA ACT ON Description On DP/PA coupler is ready. Off Off Off On DP/PA couple without diagnositc message. Off On DP/PA coupler without diag nostic message. Off Off No voltage is applied to the DP/PA coupler or error in DP/PA coupler. Flashes Profibus PA overloaded. Flashes On DP/PA coupler not correctly configured. On Off Off Flashes No Profibus DP data is received. Off Off On Flashes On On Profibus PA data received. On Off On Off On On No Profibus PA data is received. Off On On No Profibus master available. Diagnostic not available. Illegal Profibus address. On DP/PA coupler is the active energizing coupler. Table : Diagnostic LED behaviour of DP/PA coupler [9] 9 P a g e

8 Levelflex M FMP (Refer to Levelflex M FMP section in the thesis report for an overview of the functions and some background information) DIP Switches Switch HW/SW DIP switch on to set the Profibus address in the Endress+Hauser configuration software called ToF Tool. When HW/SW DIP switch is at off position, the Profibus address is determined by the DIP switch setting according to Table. The new Profibus address will become valid seconds after switching. DIP switch 8 Address value HW/SW Table : DIP switch assignments of Levelflex M FMP [8] 9 P a g e

9 Profibus Communication First of all, connect DP/PA coupler and Levelflex M FMP with a Profibus cable and also make sure the Profibus PA signal is terminated properly on each end of the network. Make sure GSD file EH_D.gsd is installed in TIA Portal, then locate the Levelflex M FMP station in TIA Portal Hardware Catalog (Figure ). Figure : Levelflex M FMP station in Hardware Catalog in TIA Portal If the master Profibus network with DP/PA coupler has been established earlier, drag the Levelflex M FMP station into the Network view and join it into the Profibus subnet (Figure ). Figure : Assign DP/PA coupler and Levelflex M FMP to the master PLC in TIA Portal Assign a Profibus address to Levelflex M FMP based on the DIP switches. (Refer to Table for setting Profibus address for Levelflex M FMP) Place slave modules onto the module rack from Catalog. At least one of the slave module needs to be placed on the rack as shown in Figure. Figure : Slave modules in the module rack in TIA Portal 9 P a g e

10 Perform a download to the PLC and the communication will be established as shown in Figure. Slave Modules Figure : Online network view of DP/PA coupler and Levelflex M FMP in TIA Portal (Refer to Slave Modules section in the thesis report for some background) Main Process Value Display the scaled actual value of the measurement. [8] (Refer to Sample Code section for some data exchange examples) nd Cyclic Value Display the distance between the sensor membrane and the measuring surface. [8] (Refer to Sample Code section for some data exchange examples) Display Value Value sent from PLC to the transmitter to be displayed on the on-site LCD module. [8] Free Place This module must be placed on the module rack if there is an empty slot. [8] 9 P a g e

11 Data Structure There is a fixed structure for all the slave modules to represent data. The first bytes are the data bytes (Table & Table ) and the th byte is the status byte (Table ). Data Byte Byte Byte VZ Exponent Fraction Table : Levelflex M FMP slave module data structure part [8] Byte Byte Fraction Table : Levelflex M FMP slave module data structure part [8] The equation to obtain the actual measured value is: Status Byte Measured Value = ( ) VZ (Exponent ) ( + Fraction) Equation : Levelflex M FMP slave module actual value conversion equation [8] Status code Device status Main process Value nd Cyclic Value C Bad N/A Device error F Bad Device error. N/A F Bad Out of service (target mode). N/A Uncertain N/A Non-specific Uncertain Last usable value. N/A B Uncertain Substitute set. N/A F Uncertain Initial value. N/A C Uncertain Configuration error. N/A 8 Good OK. OK 8 Good Active block alarm. N/A 89 Good Low alarm. N/A 8A Good High alarm. N/A 8D Good Low low alarm. N/A 8E Good High high alarm. N/A Table : Levelflex M FMP slave module status code description [8] 9 P a g e

12 Deltabar S PMD (Refer to Deltabar S PMD section in the thesis report for an overview of the functions and some background information) DIP Switches Switch HW/SW DIP switch on to set the Profibus address in the Endress+Hauser configuration software called FieldCare. When HW/SW DIP switch is at off position, the Profibus address is determined by the DIP switch setting according to Table. The new Profibus address will become valid seconds after switching. DIP switch 8 Address value HW/SW Table : DIP switch assignments of Deltabar S PMD [8] 9 P a g e

13 Profibus Communication First of all, connect DP/PA coupler and Deltabar S PMD with a Profibus cable and also make sure the Profibus PA signal is terminated properly on each end of the network. Make sure GSD file EHX.gsd is installed in TIA Portal, then locate the Deltabar S PMD station in TIA Portal Hardware Catalog (Figure ). Figure : Deltabar S PMD station in Hardware Catalog in TIA Portal If the Master Profibus network with DP/PA coupler has been established earlier, drag the Deltabar S PMD station into the Network view and join it into the Profibus subnet (Figure ). Figure : Assign DP/PA coupler and Deltabar S PMD to the master PLC in TIA Portal Assign a Profibus address to Deltabar S PMD based on the DIP switches. (Refer to Table for setting Profibus address for Deltabar S PMD) Place slave modules onto the module rack from Catalog. At least one of the slave module needs to be placed on the rack as shown in Figure. Figure : Slave modules in the module rack in TIA Portal 9 P a g e

14 Perform a download to the PLC and the communication will be established as shown in Figure. Slave Modules Figure : Online network view of DP/PA coupler and Deltabar S PMD in TIA Portal (Refer to Slave Modules section in the thesis report for some background) Main Process Value This modules displays the scaled actual value of the measurement. types of measurements, pressure, level and flow could be chosen in either on-site LCD module or FieldCare. [8] (Refer to Sample Code section for some data exchange examples) nd Cyclic Value Display the value of the measurement depending on the option selected in either on-site LCD module or FieldCare. Four available options are as follows: Temperature: Corresponds to the temperature parameter (factory setting) Sensor value: Corresponds to the sensor pressure parameter. Trimmed value: Corresponds to the corrected pressure parameter. Secondary value: Corresponds to the pressure parameter. [8] (Refer to Sample Code section for some data exchange examples) rd Cyclic Value Display the value of the measurement depending on the option selected in either on-site LCD module or FieldCare. Two available options are as follows: Totalizer (factory setting) Totalizer [8] Display Value Value sent from PLC to the transmitter to be displayed on the on-site LCD module. [8] Free Place This module must be placed on the module rack if there is an empty slot. [8] 98 P a g e

15 Data Structure There is a fixed structure for all the slave modules to represent data. The first bytes are the data bytes (Table & Table 8) and the th byte is the status byte (Table 9). Data Byte Byte Byte VZ Exponent Fraction Table : Deltabar S PMD slave module data structure part [8] Byte Byte Fraction Table 8: Deltabar S PMP slave module data structure part [8] The equation to obtain the actual measured value is: Status Byte Measured Value = ( ) VZ (Exponent ) ( + Fraction) Equation : Deltabar S PMD slave module actual value conversion equation [8] Status code Device status Main process value nd cyclic value rd cyclic value Bad Not specific. Bad Calibration configuration error. C Bad Device error. Bad Sensor error. F Bad Out of service (target mode). N/A N/A Uncertain Not specific. Uncertain Last valid value. N/A N/A 8 Uncertain Substitute value. N/A N/A C Uncertain Initial value. N/A N/A C Uncertain Linearization configuration error. Uncertain Simulation in progress. 8 Good OK. 8 Good Active block alarm. N/A N/A 89 Good Low alarm. N/A N/A 8A Good High alarm. N/A N/A 8D Good Low low alarm. N/A N/A 8E Good High high alarm. N/A N/A Table 9: Deltabar S PMD status code description [8] 99 P a g e

16 Sample Code Read from DP/PA Coupler Figure 8: Online sample code read current of current slave module of DP/PA coupler data exchange Read hex from Main Process Value low word hex = bin, which indicates that VZ =, exponent =, the first part of the fraction gives. and.. Ignore Main Process Value high word because the value is too small. Therefore, the actual pressure read from the level transmitter is (-) (-) ( +. +.) = ma. Read 8 hex from Main Process Value status Current is ok. Read from Levelflex M FMP Figure 9: Online sample code read level and distance of main process value and nd cyclic value slave module of level transmitter data exchange Read hex from Main Process Value low word hex = bin, which indicates that VZ =, exponent =, the first part of the fraction gives. and.. Ignore Main Process Value high word because the value is too small. Therefore, the actual level read from the level transmitter is (-) (-) ( +. +.) =.. Read 8 hex from Main Process Value status Level is ok. Read F hex from nd Cyclic Value low word bin, which shows that VZ =, exponent =, the first part of the fraction gives.,.,.,. and.8. Ignore nd Cyclic Value high word because the value is too small. Therefore, the actual distance read from the level transmitter is (-) (-) ( ) = 88. Read 8 hex from nd Cyclic Value status Distance is ok. P a g e

17 Read from Deltabar S PMD Figure : Online sample code read pressure and temperature of main value and nd cyclic value slave module of pressure transmitter data exchange Read C8 hex from Main Process Value low word C8 hex = bin, which indicates that VZ =, exponent =, the first part of the fraction gives.,. and.. Ignore Main Process Value high word because the value is too small. Therefore, the actual pressure read from the level transmitter is (-) (-) ( ) = -.mbar. Read 8 hex from Main Process Value status Pressure is ok. Read B hex from nd Cyclic Value low word bin, which shows that VZ =, exponent =, the first part of the fraction gives.,.,., and.. Ignore nd Cyclic Value high word because the value is too small. Therefore, the actual temperature read from the level transmitter is (-) (-) ( ) =.. Read 8 hex from nd Cyclic Value status Temperature is ok. P a g e

18 This is the end of Appendix XII. P a g e