TM70Bi V3.2 (11/02)
1121174 L0.pdf
31
IKUSI reserves the right to change this information without prior notice.
TM70 – “FIRST COME – FIRST SERVED” OPERATION
10.1 - INTRODUCTION
This option allows the operation of one crane individually by using two transmitters with two different
ID codes, which determine which transmitter is governing the crane at a certain time. For First come
– First served applications the receiver is required to scan the radio channels in order to receive
radio signals from different transmitters.
The First come – First served mode is defined by EEPROM, and the transmitters do not need to
have a selector. The First come – First served mode consists of a receiver which liberates the ID
code every time the receiver is switched off, and hence it starts searching for IDs defined in the
EEPROM ID code list. The first valid ID code found is selected, and locked on to it until the operator
releases the crane by pressing the Stop button. After a time defined in EEPROM (0.1 – 25 seconds,
default 4 seconds), the receiver liberates the ID to which it was locked and starts scanning IDs and
radio channels. The first transmitter switched on is the First transmitter to hold control of the crane,
and it will not let any other transmitter to have control of the crane until the transmitter is switched
off.
A First Come – First Served operation with cranes is always delicate, given that the
receiver is FREE every time the STOP button is pressed or there is a radio link failure.
10.2 - TWO TRANSMITTER’S SYSTEMS
Transmitters 1 and 2 have two different IDs and transmit in two different radio channels. Once the
receiver is switched off by any of the transmitters, after the liberation time defined in the EEPROM,
the receiver starts scanning for IDs and radio channels, looking for a frame with the start order
pressed.
A First come – First served system can have up to 32 different transmitters governing a single
receiver.
F2
F1
F2
ID1
ID2
F1
ID1
ID2
TRANSMITTER 2
TRANSMITTER 1
RECEIVER 1
