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User manual InterBus-S master module

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1. The IBSM modules uses the LINK AREAS in the PLC memory The first IBSM module the one installed closest to the CPU uses LINK AREA 1 If a second IBSM module is installed it will use LINK AREA 2 The number of output words is specified by the LINK END address of each LINK AREA The LINK START address must always be set to zero See section 5 for a detailed example of the configuration and set Up INTERBUS S BUS cable The pin layout of the IBS remote connector follow the INTERBUS S standard according figure 3 below IBSM Slave unit 1 Remote BUS OUT Remote BUS IN PE een Mfo ao town fofo efo ser ffo Pink Female Figure 3 INTERBUS S BUS cable INTERBUS S Master Module Communication module for H252 4 Indications and IBSM front panel All INTERBUS S status information is available on the IBSM front panel according figure 5 There is also some information for the PLC this information is stored in the WR area according to the table below ERROR Error code same Watchdog toggles with code as on display approx 2 Hz during normal operation Error present flag 0 no error 1 error Figure 4 Content of ERROR word Bit O in the ERROR register is set if the IBSM is in error mode E displayed on the leftmost display The error code same as on display is stored in the most significant byte see figure 4 Bit 1 in the ERROR register is toggling with 2 Hz during normal operation data is transferr
2. User manual InterBus S master module Version 9809 1 02 HITACHI INTERBUS S Master Module Communication module for H252 Table of contents Section Page 1 INTERBUS S general information 2 INTERBUS S topology 2 INTERBUS S technical specification 3 2 The INTERBUS S MASTER module 3 Features 3 Function description 4 3 Installation and configuration Hardware set up Software set up INTERBUS S bus cable mama mn 4 Indications and IBSM front panel 9 5 Programming the IBSM 11 6 Troubleshooting 13 Common ERROR description 13 INTERBUS S Master Module Communication module for H252 1 General INTERBUS S information This section contains a short technical and functional description of the INTERBUS S standard For a more detailed description please consult the INTERBUS S specification INTERBUS S topology Local bus max 10m max 1 5m max1 5m Remote bus max 400m INTERBUS S Master Module Communication module for H252 INTERBUS S basic specification Remote bus Mox length of remote bus segment 400m Max bus cable length between Host and first remote bus module 400m two remote bus modules 400m Host and last remote bus module 12 8 km Transmission rate 500 kbits s Transmission medium RS 485 2 The INTERBUS S MASTER module This section contains a general technical and functional description of the INTERBUS S master unit IBSM Features INTERBUS S compatible F
3. ard RS232 cable according fig D SUB 9 pos D SUB 9 pos male connctor female connctor S O Figure 1 Connection cable between PC and IBSM INTERBUS S Master Module Communication module for H252 3 Installation and configuration The following section contains a description over the installation and configuration steps that the user have to observe The IBSM module shall be mounted close as possible to the CPU Hardware set up The hardware set up is done with a DIP switch on the IBSM circuit board The DIP switch is located on the circuit board according to figure 2 below mmj i 3 pa i ee LL ptf te Of i pac ai ES ca ES ka EI E E Cc D EEPR ane FI 2020 ES SH 080000 a Pi KEDE aa RI A ca ER b Configuration switch Not used Figure 2 Configuration switch The hardware set up controls the following two functions 1 Always set to off Switch I 2 SH Stop Hold Switch 2 3 RI Run Indication Switch 3 4 ER Error Recover Switch 4 INTERBUS S Master Module Communication module for H252 Switch 5 8 is not used in this version of the IBSM module INTERBUS S Master Module Communication module for H252 EEPROM e This feature is not s
4. ast update time 32 units with 2048 I O points are updated in 7 2 ms Handles 2048 I O points 2048 inputs and 2048 outputs Easy to configure and program Supports INTERBUS S diagnostic software INTERBUS S Master Module Communication module for H252 Function description The Hitachi INTERBUS S master module named IBSM is designed to operate as a master unit in a INTERBUS S network The IBSM work s together with the H252 CPU units from Hitachi in a BSH base Two IBSM units can be installed in the same base and each IBSM unit can handle 2048 input points and 2048 output points The IBSM module is easy to use and configure All the INTERBUS S dependent configurations is done through the PLC program in CPU unit The only configurations done on the IBSM module is the SH EEPR ER and RI selections see section 3 for further details For the programmer the IBSM module will act like a normal link module i e the INTERBUS S I O data is stored in the link area If the IBSM module fails to transfer the I O data the ERROR word is set to one otherwise it is set to zero The type of error is indicated in the ERROR word most significant byte and on the front panel display The IBSM module supports the INTERBUS S diagnostic software This tool is a standard INTERBUS S program for diagnostics The PC with the diagnostic software IBS SYS SWT is connected to the RS232 port on the IBSM module The communication cable used is a stand
5. cover If the RESET button is pressed during normal operation the number of connected slave modules is shown on the display 5 Programming the IBSM The following section contains a simple step by step guide about how to use the IBSM module in a project Step I Make a map over the INTERBUS S network The first step is to document map the INTERBUS S system in the application Doing so the number of input and output words will be given If the number of I O words exceeds 2048 two separate InterBus networks have to be used INTERBUS S Master Module Communication module for H252 Hitachi PLC Valve Block OP Panel Servo I Slave unit 1 Slave unit 2 Slave unit 3 PIC B EE S 2 output words 2 input words 2 output words R JU M 2 input words TL TE I Figure 6 Example INTERBUS S system Step 2 Transfer the INTERBUS S MAP to the PLC programming project When the INTERBUS S system is documented the MAP has to be transferred to the PLC program Since only one IBSM module is needed it will work with data in LINK AREA 1 The system above gives the following PLC set up WL1 START address WL1 END address 5 Adress WLOOO0O WLOO01 WL0002 WL0003 WL0004 WL0005 WL0006 WL0007 WL0008 WL0008 WLOO09 WLOOOA Label VB OUTI VB OUT2 SERVO 1 SERVO 2 VB_IN1 VB_IN2 OP 1 OP 2 OOH always zero OSH three 2 words units are used 0 Description First output word Valve Block Second output w
6. ed This bit is working as a watchdog for the PLC program The min max and previous time is the time of one communication cycle Min and max refresh time is the longest and shortest times INTERBUS S Master Module Communication module for H252 measured Previous refresh time is the time that the last communication cycle used READY READY JE crr CTRL FAIL FA SD GB RB RB RUN RUN GE LB BSA Bsa WD GB mop MOD Display RESET button Remote Bus connector 9 pos D SUB female 3LOWIU SAI RS232 connector interface for diagnostic software 9 pos D SUB male HITACHI INTERBUS S MASTER Figure 5 IBSM front panel The LED Light emitting diodes indicates the following RB Remote BUSeror oo o INTERBUS S Master Module Communication module for H252 Module error INTERBUS S Master Module Communication module for H252 The front panel display indicates the following Display INTERBUS S system error press RESET to recover E2 The slot that the IBSM is placed in is not configured to CPU LINK Configure the CPU and the system will recover automatically LINK start address error should always be set to zero reload set up and press RESET to recover Er reload set up and press RESET to recover E5 Fatal IBSM error the only way to recover is power down and power up again If the module does not recover it has to be replaced Communication with H 252 failed Reconfigure H 252 to re
7. ord Valve Block OP Panel output word 1 dummy OP Panel output word 2 dummy First output word Servo controller Second output word Servo controller First input word Valve Block Second input word Valve Block First input word OP panel Second input word OP panel First input word Servo dummy Second input word Servo dummy INTERBUS S Master Module Communication module for H252 Note If a INTERBUS S slave module only have input or output words it always have the same amount of output or input words Step 3 Install and configure the IBSM module The IBSM module fits in a BSH base with a H250 or H252 Hitachi CPU The only set up done on the IBSM circuit is the SH function described above If two IBSM modules are installed in the same base the IBSM module closest to the CPU will operate on LINK AREA 1 and the second will operate on LINK AREA 2 Step 4 Write the PLC program The last step is to write the actual PLC program If all the steps above is accomplished the program will be much easier to write and maintain for future 6 Troubleshooting The following section contains a short description over those errors that can be encountered when the IBSM module is used Common ERROR description This section will be updated as soon as feedback information from the end users are available
8. upported Always set switch to off Stop Hold This function enables the user to select whether or not the output data from the master should be set to zero when the CPU key is changed to STOP mode e when switch 2 is in ON position output data from the IBSM will forced to zero e when switch 2 is in OFF position IBSM freezes current output data Run indication This switch choose the way in which normal operation bus is running and data is transferred is indicated on the display e When switch 3 is in ON position normal operation is indicated by a blank display e When switch 3 is in OFF position normal operation is indicated with a running light in the display Error recover This switch selects recover method when an INTERBUS error has occurred e When switch 4 is in ON position the IBSM will try to recover from INTERBUS errors automatically e When switch 4 is in OFF position the IBSM will try to recover from InterBus errors automatically the first 60s after power up after that is manual reset with the reset button used to recover from the error INTERBUS S Master Module Communication module for H252 Software set up The only configuration done from the PLC set up is to specify the number of output words i e the total number of output words for the INTERBUS S slave units Connected to the system The number of input words is always the same as the number of output words according to the INTERBUS S standard

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