The removable electrically erasable programmable read-only memory (EEPROM) feature, for example, allows the operator to have one transmitter to spare an unlimited number of like systems simply by transferring the EEPROM from one transmitter to another like transmitter. “This virtually eliminates down time and the need for multiple spare transmitters,” Cervis said.
Both the transmitter and receiver have duplicate copies of EEPROM so in the case when a transmitter is lost or the transmitter’s EEPROM is destroyed, the spare transmitter can copy the receivers.
Cervis TM60 radio remote crane control systems can also be equipped with a range limitation option. This option will prohibit the system from being operated outside a working area defined by the LA60 infrared transmitter. “The system must have a line-of-sight between the operator and the LA60,” Cervis said.
If the operator becomes temporarily shielded from the range limiter device(s), the system is engineered to be flexible in order to continue operation and facilitate the operator’s movements for a factory set period of four seconds. This time can be adjusted, depending on customer specification.
The overall design of the system is to ensure the operator is within a safe working distance from the crane while simultaneously permitting normal work related movements of the operator.
The system consists of one or more LA60 infrared transmitters. The LA60 can be installed in a fixed position or on the controlled crane and oriented in such a way that they cover the targeted working zone.
Range limited TM60 RF transmitters contain an infrared sensor which receives the information emitted from the LA60 transmitter. This information is analysed by transmitter microprocessor and acts as a permissive. If the transmitter does not receive the infrared data within a pre-determined amount of time, the outputs are deactivated.
For more information on EEPROM, range limitation or other crane and hoist control solutions, visit Cervis at ProMat, booth 973.
