Prohibited

CAUTION ON OPERATION

DANGER!

?Do not wipe the unit with wet cloth.

Not following this instruction could cause electrocution.

?Do not pull the communication cable, otherwise malfunctions or troubles could result.

CAUTION ON DISPOSING OF OPTION UNIT

CAUTION!

MANDATORY

?Dispose of the used unit as industrial waste. Not following this instruction could cause injury.

Cautions on use

CAUTIONS

?Avoid installation locations that may be subjected to rapid changes in ambient temperature or/and humidity.

?Route the transmission cable separate from the ASD input/output power wiring. To avoid the possibly of electric shock due to leakage currents, always ground

?the ASD unit’s E/GND terminal and the motor. To avoid misoperation, do not connect RS-485 Option Unit’s SHIELD terminal to either of above-mentioned grounds or any other ground.

?When disconnecting connection cable, make sure to hold its connector with care not to give unreasonable stress to the cable and the unit. Since connectors of optional cables have locking pawls for disconnection prevention at the ASD and the Option Unit, disconnect such a connector while pressing the pawl by finger for unlocking.

?Mount the Option Unit securely on the panel, otherwise it could fall and cause malfunction or breakdown.

?Connect an electromagnetic contactor or the like between the ASD and the power source to secure external control of emergency stop of operation.

?Do not assign the same ASD number to more than one ASD in the same system.

?The ASD’s EEPROM has a life of 10,000 write cycles. Do not write to the same EEPROM address more than 10,000 times.

RS-485 specifications

The Toshiba RS-485 is a robust and widely used communication standard designed for industrial applications involving serial data transmission. This technology is particularly appreciated for its ability to connect multiple devices (up to 32 nodes) using a simple twisted pair wiring, making it cost-effective and efficient in environments where reliable communication is essential.

One of the main features of the Toshiba RS-485 is its differential signaling technique. This approach significantly reduces noise and allows for long-distance communication, often exceeding 4000 feet. By utilizing a twisted pair cable, RS-485 devices can communicate at baud rates of up to 10 Mbps, although practical distances may require lower speeds to maintain data integrity.

Toshiba's implementation of RS-485 also supports half-duplex and full-duplex modes, providing versatility in how devices communicate. In half-duplex mode, data can be transmitted in both directions but not simultaneously, making it suitable for applications where control over the communication direction is manageable. Full-duplex mode, on the other hand, enables simultaneous two-way communication, improving the speed and efficiency of data transfer.

The Toshiba RS-485 standard is characterized by its robustness in handling high electromagnetic interference (EMI) and its ability to operate in harsh environments. With a wide operating temperature range, the RS-485 devices can function effectively in various industrial settings, from factories to outdoor applications. Furthermore, the standard supports various voltage levels, providing flexibility in design and functionality.

Another essential technology in the Toshiba RS-485 system is its fault tolerance. The differential signaling allows devices to maintain communication even if one of the wires is compromised, providing greater reliability compared to single-ended systems. Additionally, the use of termination resistors helps mitigate reflections, further enhancing performance.

In summary, Toshiba RS-485 technology provides the backbone for reliable, efficient, and robust serial communication in industrial applications. Its features, including long-distance capabilities, support for multiple devices, resistance to noise, and fault tolerance, make it a preferred choice for many engineers and system designers. This standard not only meets the demands of the industry but also adapts to the evolving technological landscape, ensuring that it remains relevant in the years to come.