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E6581315 ② T OSVER T VF-AS1 Series RS485 Communication Function Instruction Manual * The contents of this manual ar e subject to change w ithout notice. © TOSHIB A SCHNEI DER INVE RTER CORPORA TION 2005 All right s reserved. Notice 1. Make sure that this instruction manual is deliv ered to the end user of the inverter.
E6581315 1 Read first Safety precautions This manual and labels on the inverter prov ide very important information that you should bear in mind to use the inverter properly and safely , and also to avoid injury to y ourself and other people and damage to property.
E6581315 2 Contents 1. General outlines of t he communicati on function............................................................................... .......................... 3 2. Data transmission specific ations ..................................
E6581315 3 1. General outlines of the communication function This manual ex plains the RS485 communication f unction provided for the TOSVERT VF-AS1 series of industrial inverters.
E6581315 4 2. Data transmission specifications Items Specifications Transmission scheme Half-duplex Synchronization scheme Start-stop synchronization Communication baud rate 9600/19200*/38400 bps (sel.
E6581315 5 3. Communication protocol This communication protocol supports the T OSH IBA Inverter Protocol and part of M ODBUS-R TU protocol. Select the desired protocol from in the follo wing communication protocol selection parameters ( , ).
E6581315 6 4. T OSHIBA Inverter Protocol Select “TOSHIBA” ( , = ) in the communication protocol selection parameters. “TOSHIBA” ( , = ) is set for initial communication protocol selection of shipment setting.
E6581315 7 4.1. Dat a transmission format Note: The term “trip st atus” used in this manual in cludes retry waiting st atus and trip retention status.
E6581315 8 Inverter → computer At time of broadcast communication, returning of data is not ex ecuted, ex cept for the inverters to be returned, when the inverter number is not matc hed, and the inverter number has only one character. This is because there w ill be a risk of that the returned data may be deformed.
E6581315 9 • Data returned w hen data is not processed normally (ASCII mode) In case an error occurs, communication error co mmand (4EH(N) or 6EH(n)) and the error type num- ber is returned to the computer in addition to t he checksum.
E6581315 10 4.1.2. Data transmission format used in binary mode A communication number is used to specify a data it em, data is written in hexadecimal form, and data in transmission characters are r epresented by binary codes (HEX codes).
E6581315 11 Inverter → computer (binary mode) At time of broadcast communication of the binary m ode, returning of data is not executed ex cept for the inverter to be returned (inverter number 00H) and when the inverter number is not matched. This is because there will be a risk that the returned data may be deformed.
E6581315 12 2) Error Processing (Binary mode) In case an error occurs, communication error co mmand (4EH(N) or 6EH(n)) and the error type num- ber is returned to the computer in addition to the checksum.
E6581315 13 4.1.3. T ransmissi on format of Block Communi cation W hat is block communication? Data can be wr itten in and read from several data groups set in one communication by setting the type of data desired for communication in the block communication parameters ( , , to ) in advance.
E6581315 14 Block W rite 1, 2 Select data, which is desired to be written in block communication, in block write Data 1 and 2 Pa- rameters ( , ) . This parameter becomes effective when the system is reset, such as when pow er is turned off.
E6581315 15 Inverter → Computer At time of broadcast communication of the binary m ode, returning of data is not executed ex cept for the inverter to be returned (inverter number 00H) and when the inverter number is not matched. This is because there will be a risk that the returned data may be deformed.
E6581315 16 2) Error Processing (Binary mode) In case an error occurs, communication error co mmand (4EH(N) or 6EH(n)) and the error type num- ber is returned to the computer in addition to the checksum. O m i s s i b l e (3.5bytes Blank) “/” (2FH) INV-NO 1 byte Norn (4EH)(6EH) DATA 2 bytes SUM 1 byte (3.
E6581315 17 4.2. Commands Here are the communication commands available. Command Function R command Reads the data with the specified communication number. W command W rites the data with the specified communication number. (RAM and EEPRO M). P command W rites the data with the specified communication number.
E6581315 18 P (50 H ) (RAM *1 wri te ) This command is used to rewrite data into the parameter specified using a communication number. It writes data into the RAM only .
E6581315 19 W hen Command “s” (lowercase letter) is received, the slave side judges that the master side is tripped and operates in accordance with the inter-drive communication parameter ( , ). For detail, see "7. Communication parameters ".
E6581315 20 4.3. T ransmissi on errors Table of error codes Error name Description Error code Impossible to exe- cute The command is impossible to ex ecute, though communication wa s established normally. 1 W riting data into a parameter whose setting cannot be changed during operation (e.
E6581315 21 4.4. Broadcast communication functi on Broadcast communication function can transmit the comm and (write the data) to multiple inverters by one communication. Only the write (W , P) command is valid and the read (R, G) command is in- valid.
E6581315 22 In broadcast communication, only the representative inv erter in each block returns data to the host computer. However, y ou can make the representative inverter in each block report the occurrence of a problem in the block. To do so, follow these steps.
E6581315 23 4.5. Examples of the use of communi cation commands Here are some examples of the use of communica tion commands provided for the VF-AS1 series of inverters. Inverter numbers and checksum used in ASCII mode are omitted from these ex amples.
E6581315 24 4.6. Examples of Communi cation programs According to the hardw are configur ation of the computer used, select a serial output port. T o use an RS232C port on the computer, y ou will hav e to prepare an R S232C-RS485 conversion unit sepa- rately.
E6581315 25 Ex. 2: BASIC program for executing an input command w ith checksum (RS232C, ASCII mode) (Toshiba version of Advanced BASIC-86 Ver. 3.01.05J) ◊ Checking if the max imum frequency setting .
E6581315 26 Ex. 3 BASIC program for communi cation tests (RS232C, ASCII mode) (Toshiba version of Advanced BASIC-86 Ver. 3.01.05J) ◊ Accessing a parameter (with error code.) 1) Examples of programs 100 INPUT "Baud rate=9600/4800/2400/1200";SPEED$ ---- Selects a baud rate.
E6581315 27 Ex. 4 A VisualBaisc program for the ASCII mode communication (VisualBaisc is the register ed trademark of the U.S. microsoft company.) ◊ Accessing a parameter 1) Sample program executiv .
E6581315 28 3)The description of the code Private Sub Form_Load() Form1.Show '********************************************************************** ' Setting the labels (Initialization) '********************************************************************** Label1.
E6581315 29 5. MODBUS-R TU protocol The M OD BUS-RT U protocol of VF-AS1 supports only part of the M ODBUS-R TU protocol. Only two commands are supported, “03: Multiple dat a read (limited only to two bytes)” and “06: W ord writes.” All data will be binary codes.
E6581315 30 5.1. MODBUS-RTU transmission format MO DBUS-RT U sends and receives binary data wit hout a frame-synchroniz ing start code and de- fines the blank time to recogniz e the start of a fr ame. M ODBUS-R TU decides the data that is first received subsequently as the first byte of a frame after a blank time for 3.
E6581315 31 5.1.2. Write command (06) Computer → Inverter *The tex t size is 8 bytes fix ed. Inverter No. Command Commu- nication No. (high) Commu- nication No. (low) Wr i t e D a t a (high) Wr i t e D at a (low) CRC (low) CRC (high) (3.5bytes Blank) 06 (3.
E6581315 32 5.2. CRC Generation “CRC” is a system to chec k errors in com municati on frames during data transm ission. CRC is composed of two bytes and has hexadecimal-bit bi nary values. CRC values are generated by the transmission side that adds CRC to mes sages.
E6581315 33 <Notes> Speed command can be transmitted but the run / stop signal is not issued. Slave station should have an indi- vidual stop signal or the function to stop the action by the frequency reference. (Setting is necessary for : Operation start frequency, : Operation start frequency hysteresis .
E6581315 34 Q W iring (2-wire RS485 communication) Master RXD+/ TXD+ RXD- /TX D- SG C N1 Pin -4 Pin -5 Pin -8 (Pin -3) Str aight Straight Terminat ing resistance 120 Ω -1/2 W Str aight Sla ve RXD+/ TXD+ RXD-/TXD- SG Sla ve RXD+/ TXD+ RXD- /TX D- SG Sla ve RXD+/ TXD+ RXD- / TXD - SG * Never use pin-7 (P11).
E6581315 35 Setting of parameter ● Protocol selection ( , ) Shipment setting: 0 (TOSHIBA) Protocol setting with all inv erters (both master and slave inverters) engaged in inter-driv e commu- nication 0: Set the TOSHIBA.
E6581315 36 Relating communication parameters Following parameters should be set or changed if necessary . • Baud rate ( , )... Shipment setting = : 19200bps Baud rate of all inverters in the netwo rk (master and slave) should be same netw ork.
E6581315 37 6.1. Proportional control of speed Proportional control of frequency can be performed in two ways: control by selecting frequency points and control by adjusting the ratio to the maximum frequency.
E6581315 38 • If the “Frequency point selection” function is disabled ( = ) The operation frequency (frequency command value) of the inverters are calculated using the fol- lowi.
E6581315 39 6.2. T ransmission form at for inter-drive communication Data type is handled in hexadecimal notation and t he transmission characters are treated with the binary (HEX ) code. The transmission format is basically the same to the case of binary mode.
E6581315 40 7. Communication parameters The settings of communication-related paramet ers can be changed from the operation panel and the ex ternal controller (computer).
E6581315 41 Com- munic a- tion Number . Title Function Adjus tment range Unit Default setting V alid Refere nce 0826 Inverter-t o-inverter com munic ation setting (4-wire RS485) 0:Slave (.
E6581315 42 7.1. Baud rate( , ) , Parity ( ) • Communication baud rate and parity bit should be uniform inside the same netw ork. • This parameter is v alidated by resetting the pow er supply. 7.2. Inverter number( ) This parameter sets individual numbers w ith the inverters.
E6581315 43 7.3. Communication tim e-out time ( ), Comm unication time-out action ( f804 ) The timer function is mainly used to detect a break in a cable during communication, and if no data is sent to an inverter within the preset ti me, this function makes the inverter trip ( ) or issue an alarm ( ).
E6581315 44 7.4. Send w aiting time ( , ) Use this function for the following case: W hen the data response from the inverter is too qui ck after the PC had sent the data to .
E6581315 45 8. Commands and monitoring from the computer Across the network, instructions (commands and frequency) can be sent to each inverter and the operating status of each inverter can be monitored.
E6581315 46 Communication command2 (Com munic ation Number : F A20, FA22) This command is enabled only w hen the communication command is enabled. Set Bit 15 of Com- munication Command 1 (communication Number: FA00, FA04) to “1” (enable).
E6581315 47 Frequency setting f rom the computer “Com munication Number: FA01, FA05” Setting range: 0 to maximum frequency ( fh ) This frequency command is enabled only w hen the frequency command by communication is en- abled.
E6581315 48 T erminal board output data (F A50) The output terminal board on each inverter can be directly controlled with the computer. To use this function, select functions 92 to 105 in advance for the output terminal function selection parameters f130 to f138 , f168 and f169 .
E6581315 49 8.2. Monitoring from the com puter This section ex plains how to monitor the operati ng status of the inverter from the computer. Monitoring of the out put frequency from the c omputer (FD00, FE00) Output frequency (current status): “Communi cation Number FD00” (minimum unit: 0.
E6581315 50 Input terminal board status (FD06, FE06) Input terminal board status (current status): “Communication Number FD06” Input terminal board status (status immediately before the occurr.
E6581315 51 Output terminal board status (FD07, FE07) Output terminal board status (current status): “Communication Number FD07” Output terminal board status (status immediately before the occ.
E6581315 52 Inverter operating st atus 1 (FD01, FE01) Inverter status 1 (current st atus): Communication Number FD 01 Inverter status 1 (status immediately before the occurrence of a trip): Commun.
E6581315 53 Inverter operating st atus 2 (FD42, FE42) Inverter status 2 (current st atus): Communication Number FD 42 Inverter status 2 (status immediately before the occurrence of a trip): Commun.
E6581315 54 Inverter operating command mode st atus (FD45, FE45) The monitor of the command mode t hat the present condition is enabled Command mode status (current stat us): “Communication Numb.
E6581315 55 Alarm information monitor (FC91) Bit Specifications 0 1 Remarks (Code displayed on the panel) 0 Over-current alarm Normal Alarming flickering 1 Inverter ov erload alarm Norma.
E6581315 56 T rip code monitor ( current status: FC90: historic records: FE10 to FE13) Code Data (hexadeci- mal number) Data (decimal number) Description nerr 0 0 No error oc1 1 1 Over-current dur.
E6581315 57 e-24 38 56 Option 2 error e-25 39 57 Stop position retaining error e-26 3A 58 CPU2 fault etn1 54 84 tuning error etn2 55 85 tuning error etn3 56 86 Motor constant.
E6581315 58 8.3. Utilizing p anel (LEDs and key s) by communication The VF-AS1 can display data that is not related to the inverters through an external controller or other means. Input by key operations can also be ex ecuted. The use of inverter resources re- duces the cost for the entire system.
E6581315 59 Block Communication Function for LED Display To display LED data for ASCII display that is sync hronized to each digit, set data for each digit and validate this set data by display selection by communication (Communication Number FA65).
E6581315 60 ■ ASCII LED display data code (00H-1FH are blank.) Hex Code Displ ay Char. Hex Code Displ ay Char. Hex Code Disp lay Char. Hex Code Di splay Char.
E6581315 61 8.3.2. Key utilization by communication The VF-AS1 can use the panel keys on the inv e rters through ex ternal communication. Key Monitoring Procedure Set panel key selection (Communication Number: FA10) to “1” to set the ex ternal key mode.
E6581315 62 9. Parameter data Explanation of parameters for VF-AS1 series is described here. For communication purposes, see the parameter list on inverter' s instruction m anual regarding the communication number, adjustment range and so forth.
E6581315 63 Command parameters For those parameters that contain data only in t he RAM and not in the EEPROM, their data return to initial values w hen the power is turned off, in failure resetting, or when standard shipment settings are set.
E6581315 64 ＊ 1 : Enable the communication command or communication frequency setting before setting these parameters are set. Otherw ise, the parameter s will not function.
E6581315 65 Monitor parameters *These Pa rameters are read-only (monitor-only) parameters. Communication No. Current valu e Trip data held Function Unit Remarks FC00 − Monitor of key data (Effective data) − FC01 − Monitor of inv erter keypad data − Refer to Section 8.
E6581315 66 FD50 − Light-load high-speed torque 1 0.01% FD51 − Light-load high-speed torque 2 0.01% − FE60 MY monitor 1 − − FE61 MY monitor 2 − − FE62 MY monitor 3 − − FE63 MY monitor 4 − − FE70 Rated current 0.1a − FE71 Rated voltage 0.
E6581315 67 Appendix 1 T able of dat a codes • JIS (ASCII) codes Higher orde Lower order 0 1 234567 0 NUL TC 7 (DLE) (SP) ０＠Ｐ、ｐ 1T C 1 (SOH) DC 1 ! １ＡＱａｑ 2T C 2 (STX) DC 2 ２.
E6581315 68 Appendix 2 Response time The communication response time can be calcul ated from data communication time and inverter processing time. W hen wishing to know the communication response time.
E6581315 69 Appendix 3 Comp atibility with the communication function of the VF-A7 To provide consistency in communication proc edures, the communication function of the VF-AS1 series of inverters has been designed based on the protocols used for the T oshiba VF-A7 series of inverters.
E6581315 70 Appendix 4 T roubleshooting If a problem arises, diagnose it in accordance with the following table before making a service call. If the problem cannot be solved by any remedy described in the table or if no remedy to the problem is specified in the table, contact your Toshiba dealer.
E6581315 71 Appendix 5 Connecting for RS485 communication Connector diagram for 2-wire RS485 communication Connecting diagram for 2-wire RS485 communication * Never use pin-7 (P11).
E6581315 72 Connector diagram for 4-wire RS485 communication Connecting diagram for 4-wire RS485 communication * W hen using 2-wire type, short RX B to TXB and RXA to T XA.
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