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The status of a device as master or slave determines how the various pins must be configured. Page 37 Setting example of parameters (2-wire RS485 communication) Parameters relating to the master side (example)  Master (transmission of output frequency (%) (100% at FH))  Selection of communication protocol (Toshiba inverter protocol) Communication baud rate  (ex. The setting of a parameter was When using the TOSHIBA Inverter Protocol, use the W command to changed, but it returns to its write data into the EEPROM. To provide consistency in communication procedures, the communication function of the VF-AS1 series of inverters has been designed based on the protocols used for the Toshiba VF-A7 series of inverters. Page 60 Block Communication Function for LED Display To display LED data for ASCII display that is synchronized to each digit, set data for each digit and validate this set data by display selection by communication (Communication Number FA65). Page 65 ＊ : Enable the communication command or communication frequency setting before setting these parameters are set. ＊ : Note that the Communication Number for operation panel operation frequency is FA02 in the VF-S7 and VF-S9 series. 8.3.2. Key utilization by communication The VF-AS1 can use the panel keys on the inverters through external communication.

Key Monitoring Procedure Set panel key selection (Communication Number: FA10) to "1" to set the external key mode. Set Bit 15 of Com- munication Command 1 (communication Number: FA00, FA04) to "1" (enable). 8.1. Communication commands (commands from the computer) Communication command (Communication number: FA00, FA04) Commands can be executed on inverter frequencies and operation stop through communication. 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. When enabling the communication command by Communication Command 1, commands by communication can be given the priority irrespective of the setting of the command mode selection parameter (). If you use the P command that writes data original setting when the inverter into the RAM only, the data will be cleared when the inverters are reset. The device that initiates a data transfer is the master, and all other devices on the network are slaves. The /SS (active-low slave select) is typically used to enable data transfers by slave devices when it is active low. In a computer system, SCSI-2 and SCSI-3 may use this specification to implement the physical layer for data transmission between a controller and a disk drive.

If there are several sensors near and/or other data to be transmitted via GSM, it is more convenient to use Standard / RF versions supported on a concentrator or controller such as RXTXeasy GSM so you will be able to use one single SIM. To ensure that no two devices drive the network at the same time, it is necessary that each slave device be able to disable its own RS485 data transmitter. The transmission format is basically the same to the case of binary mode. 6.2. Transmission format for inter-drive communication Data type is handled in hexadecimal notation and the transmission characters are treated with the binary (HEX) code. CRC is composed of two bytes and has hexadecimal-bit binary values. When the DSR and DTR signals are not used, the two pins can be used for simultaneous RS485 communication. 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.

Dots to show decimal points and other uses can be added by setting (80H) Bit 7 (highest bit). These protocols are summarized on this page, but for more information regarding their data formats and their use for simplex or multi-drop serial lines, consult Understanding Serial Communications (but keep in mind that that page is directed to the use of the UART Wildcard, so it uses different driver functions). If bit 0 through bit 6 of terminal board output data (FA50) are set with the computer, data specified (0 or 1) can be sent to any output ter- minal. Command processing will be executed only broadcast communication "0" and with those inverters that match set inverter numbers. Page 48 Frequency setting from the computer Setting range: 0 to maximum frequency (fh) This frequency command is enabled only when the frequency command by communication is en- abled. Page 49 Terminal board output data (FA50) The output terminal board on each inverter can be directly controlled with the computer. While running this program, the parity settings of Mosaic Terminal may be adjusted, and in each case the message that matches current settings will appear clearly while the other messages will appear garbled. CRC values are generated by the transmission side that adds CRC to messages.

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