Four diagnosis methods of INTERBUS bus fault of th

2022-08-08
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At present, many domestic newspapers have rotary printing machines made by Roland company, such as geoman, colomban, uniset 70, and most of them use bus system 95 as the control system. Bus system 95 is a network integration, and the components are connected through communication cables. According to the function and network type, bus system 95 is divided into three layers: Ethernet layer, ARCNET layer and execution layer (INTERBUS layer). As the closest network to the operator and the mechanical device, INTERBUS has a high probability of failure. If you can master some fault diagnosis methods in use and maintenance and use them flexibly, you can get twice the result with half the effort

interbus is a fieldbus system developed by Phoenix company in Germany. It is an open serial bus system, which is quite different from the traditional parallel system, which brings some inconvenience to the maintenance personnel who are used to the parallel system. In practice, the author summarizes some methods of INTERBUS bus fault diagnosis for colleagues' reference, hoping to play a role in attracting jade

Roland printer bus fault diagnosis method

there are generally two kinds of INTERBUS buses in Roland rotary printer: one is the whole machine bus with G4 control board as the bus controller, which connects the whole machine, an increase of 72% over the same period last year In addition, the input/output (i/o) of the drive part, the operation panel of each printing department (or newspaper folding machine) and each paper rack, etc. The other is to use the VME MCI board of ms-1000 as the local bus of the bus controller, which connects various air valves, motor controllers, sensors and other devices of the printing department (or newspaper folding machine). No matter which part of the bus of the rotary printer has a problem, its bus controller will generate an error message of "bus failure", which will be transmitted to the industrial computer of the console through ARCNET, and then transmitted to the operation display screen by Ethernet after being processed by the industrial computer. When "INTERBUS bus fault" is displayed on the operation display screen, the fault location can be found in the main control cabinet or printing unit respectively according to its detailed information

1. Using fault display LED

interbus network is composed of bus controller, node equipment (INTERBUS module) and cable. Its possible faults are: bus controller damage, INTERBUS module damage, cable disconnection or poor connection, etc. Since the bus controller and various INTERBUS modules are equipped with light-emitting diodes for status indication, the door of the control cabinet can be opened in case of INTERBUS bus fault, and the fault indication light-emitting diodes of the bus controller and INTERBUS modules can be checked one by one according to the INTERBUS structure diagram (as shown in Figure 1). There are many light-emitting diodes with different colors (mainly red and green) on the bus controller VME MCI board and node equipment (INTERBUS module) of INTERBUS. Different states of light-emitting diodes correspond to different INTERBUS bus conditions. According to the information given by the LED, the fault location of the INTERBUS bus can be analyzed and determined, and the faulty INTERBUS module can be replaced, so as to repair the rotary printing machine. This method is more suitable for small-scale INTERBUS networks. If this method is used to diagnose large-scale networks or networks with scattered INTERBUS modules, it will take time and effort. Of course, in previous years, this method had to be used when there were no diagnostic conditions. It is worth mentioning that some fault indicating LEDs can flash at a variety of different frequencies to indicate different fault states, which must be carefully observed and identified

2. Using the fault display screen

this method is similar to the method of using the fault display LED, but because only part of the bus controllers of the INTERBUS network on the Roland wheel printer can use this method, and the function of the fault display screen is far more powerful than the fault indication LED, it is listed separately for description. The bus controller G4 control board in Siemens s in the main control cabinet has the function of fault diagnosis and display. It can diagnose and display the fault of the connected INTERBUS network, so gb/t 16989 (1) 997 "geotextile joint/joint Wide Strip Tensile Test Method". Normally, it is displayed as "run" and a circular rectangle, and the background light is green (as shown in Figure 2). Once a fault occurs, its background light turns red and displays the fault type, fault location and fault code (as shown in Figure 3). Figure 3 shows that the fault type is "lbus", indicating local bus fault; 29.1 is the address information of INTERBUS; The fault code "0d21" indicates that there is a problem with the input of a specific INTERBUS module. In addition, the fault types that may be encountered in maintenance are: "Ctrl" -- bus controller fault; "RBUS" -- remote bus failure; "Lbus" -- local bus failure; "Out1", "out2" -- output fault; "Bus" -- a bus circuit fails, but it cannot be accurately located; "Dev" --interbus module failure; "Pf" -- bus peripheral equipment failure, etc. The fault code can tell further fault information, and other different fault codes may be encountered in the work, which will not be repeated here one by one. For details, please refer to the INTERBUS fault diagnosis instruction manual. According to the address information of the INTERBUS, the detailed information such as the specific module name, location, address and drawing number can be found on the INTERBUS structure diagram (see Figure 1), so as to quickly troubleshoot

g4 control board also has the function of historical fault memory, which can be used to trace the faults that have been reset by the operator or some soft faults. It is worth noting that the INTERBUS address in these historical fault records uses a 4-digit hexadecimal number. This 4-bit hexadecimal number is divided into two parts. The high number indicates which bus circuit it is, and the low number indicates the position in the bus circuit. It should be converted into decimal number and then found on the INTERBUS structure diagram. For example, the fault address 29.1 mentioned above is recorded as 1d01 in the historical fault record

3. Xtalk program diagnosis method

xtalk is the early communication software between computers. The unit computer (unit CO1, single point fatigue test method) ms-1000 of Roland wheel printing machine has no peripherals such as display and keyboard when the number of samples is limited. Therefore, the diagnostic program in ms-1000 needs external instructions to be executed. These external instructions are issued by the notebook computer with which it communicates

the INTERBUS network of the printing department, paper rack and newspaper folding machine is controlled by the bus controller on the VME MCI board on the unit computer ms-1000. This bus controller has no display screen. When the INTERBUS fails, the fault code cannot be seen. At this time, you can run xtalk to diagnose the network through the unit computer. The specific method is: use a special cable to connect the COM1 port of the notebook computer with the RS232 communication port of the ms-1000. After running xtalk under DOS, type in the "TIBS" (note that all uppercase letters) command, press the Enter key, and then type in the "C" (configuration), and you can get diagnostic results similar to those in Figure 4 and figure 5. When all node devices are normal, the position of err -code is O.K (as shown in Figure 4). When the INTERBUS is abnormal, the position of err -code displays "0000", and the fault information is given at the bottom of the dialog window: "error [0d21] at location 11.1 (dio-1) [date=2002/10/16 time=16:36:32]", which means that a fault is found at bus address 11.1, and the fault code is "OD21" (as shown in Figure 5). According to the INTERBUS structure diagram, it can be found that the module with bus address 11.1 is a digital input/output module. The cause of the fault can be found in and near the I/O module with fault information. Compared with the method of using fault indicating led, this method can save a lot of fault finding time, and is especially suitable for the printing department and newspaper folding machine with scattered INTERBUS modules. However, the fault location given by this method is sometimes not very accurate, so it is necessary to find the fault before and after the location determined by diagnosis

the "HyperTerminal" in windows or other communication software such as NC terminal95 can also be used to communicate between the unit computer and the notebook computer. The specific method of use is similar to that of xtalk, which will not be detailed here due to space limitations

4. IBS CMD G4 diagnosis

ibs CMD G4 software is the INTERBUS application software under the window developed by the company, which can be used to diagnose the INTERBUS: connect the COM1 port of the notebook computer with the serial port of the bus controller with the communication cable, double-click the IBS CMD G4 icon to run the IBS CMD G4 software, select open under the file menu, select the INTERBUS network file name to diagnose in the "open project" dialog box, and then press OK, You can see the window similar to the INTERBUS structure diagram as shown in Figure 6. In fact, the INTERBUS structure diagram is printed with IBS CMD G4 software. Press the function key F3, and then select diagnose in the "operating state" dialog box to diagnose the connected INTERBUS network. When the INTERBUS is normal, all node devices and their connections are green; In case of fault, the faulty node device (INTERBUS module) turns red. This software can also automatically record historical fault information by making the diagnostic program run all the time and connecting with the bus controller. Historical fault information is very helpful for locating and searching the soft fault of INTERBUS bus

ibs CMD G4 software diagnosis can be used in almost all INTERBUS networks of Roland rotary press, and can locate faults more accurately. Remember to copy the INTERBUS graphic file of Roland company after installing the software, so that some modules cannot be displayed

generally speaking, INTERBUS faults can be found by using any of the above four methods. Only mastering one of them skillfully is enough to deal with various INTERBUS faults. However, using a single fault diagnosis method may only determine the fault in a small range, and can not lock the fault in a module very accurately. When time and conditions permit, it is recommended to try to use a variety of diagnostic methods and compare their results, so as to achieve the purpose of accurately locating faults, and also increase the experience of diagnosis

no matter which method is used to diagnose INTERBUS bus faults, you need to be very familiar with the structure of INTERBUS network. Because once the fault is diagnosed, the corresponding fault module must be found immediately. If you can't read the INTERBUS structure diagram, even if you can diagnose the fault quickly, you can't quickly find the faulty module on such a large rotary offset press, which will delay valuable maintenance and printing time

it is worth noting that each circuit of INTERBUS needs to pass through each node. When one of the node devices (INTERBUS module) fails, the whole network cannot operate. The traditional method of short 1, connecting transparent amorphous thermoplastic engineering plastic or skipping this node is not effective. After shorting or skipping this node device, you need to change it in the setting of the bus controller to make the INTERBUS bus run again

information source: Printing Technology-

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