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BIDIRECTIONAL LEVEL ITW
USER MANUAL
2
2. GENERAL RULES OF BIDIRECTIONAL LEVEL ITW SYSTEMS
The BIDIRECTIONAL LEVEL ITW systems are composed by the following parts:
• 1 System configured as Master.
• 1 System configured as Slave.
• 2 Antennas
• 1 User’s Manual can be discharged through the website. www.itowa.com
2.1. OPERATION
The general operation of LEVEL ITW are as follows: Every time there is a change of state of
any of the digital inputs of the MASTER equipment, this variation is transmitted wireless to
the SLAVE system to enable/disable the relay output corresponding to that input, that means,
The digital input nº 1 corresponds to the relay output nº 1, the input nº 2 corresponds to
relays output nº 2 and thus till completing all the signals. Once the SLAVE have updated the
state of its outputs is transmitting the state of its inputs to the MASTER System to
enable/disable the relays output corresponding to this input, that means the digital input nº 1
corresponds to the relays output nº 1, the input nº2 with the relay output nº 2 thus till
completing all the signals
MASTER SLAVE
Digital input nº 1 Digital output nº 1
Digital input nº 2 Digital output nº 2
…. ….
Digital input nº N Digital output nº N
Digital output nº 1 Digital input nº 1
Digital output nº 2 Digital input nº 2
…. ….
Digital output nº N Digital input nº N
Analog Output nº 1 Analog input nº 1
Analog Output nº 2 Analog input nº 2
Analog Output nº 3 Analog input nº 3
Analog Output nº 4 Analog input nº 4
In addition to sending the information every time that a change of state occurs in the inputs,
every 5 minutes the MASTER system transmits the state of the inputs to refresh the
information to the SLAVE and check communications. In equipment with analogue signals the
value of these, will be updated in each communication establishment, either by digital input
change or by time refresh.
The SLAVE system does not sent the change of its inputs until is not questioned by the
MASTER system for time or change in its inputs.
2.1.1. MASTER / SLAVE DIGITAL LEVEL ITW
When connecting the MASTER / SLAVE system on the LCD screen will appear a test
consisting in different informative messages sequentially. To pass the different messages
you have to press the green pushbutton.