Siemens MICROMASTER 420 - Working with Binary Connectors (Bico); Introduction; How Does Bico Work

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MICROMASTER 420 Reference Manual
28 Issue A1
2.16

Working with Binary Connectors (BiCo)
2.16.1 Introduction
To make use of BiCo you will need access to the full parameter list. At this level
many new parameter settings are possible, including BiCo functionality. BiCo
functionality is a different, more flexible way of setting and combining input and
output functions. It can be used in most cases in conjunction with the simple, level
2 settings.
2.16.2 How does BiCo work?
The BiCo system used on more complex drives such as Masterdrives, allows
complex functions to be programmed. Boolean and mathematical relationships
can be set up between inputs (digital, analogue, serial etc.) and outputs (inverter
current, frequency, analogue output, relays etc.).
The MICROMASTER 420 uses a simplified version of BiCo, which is still very
flexible, is contained within the parameter set and can be set up without using
additional software or hardware.
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Use BiCo parameterization to enable the output relay using Digital Input 2.
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1 Set P0003 to 3 to access all parameters.
2 Set P0702 to 99 to enable BiCo parameterization on Digital Input 2.
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If P0701, 2, 3, or 4 are set to 99, it is not possible to change them to another
value; the inverter must be reset to factory defaults.
3 Because Digital input 2 is ‘open’ to BiCo settings, a new value 722.1 now appears
in P0731.
The value 722.1 means ‘connect to digital input 2’
(722.0 = input 1, 722.2 = input 3 etc.).
Set P0731 to 722.1
4 Run the inverter using input 1 and operate the relay using input 2.
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BiCo is a ‘reverse’ connection. That is, the output function is connected back to
the input so it is not possible to tell from P0702 (99) what the digital input is
controlling. However, there are many diagnostic parameters that can assist in
setting up BiCo functions. (See following examples).
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Set P0771 to 37; this connects the analogue output to the inverter temperature
parameter, r0037, so the temperature of the inverter can be monitored remotely.