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This chapter discusses how to use variables and constants in nanoNavigator. It begins with 

an overview of the available data item types and includes details on available data 

operations. 

There are ten data item types in nanoNavigator. Depending on the nanoLC configuration, 

some data item types may not be present in the Data Item Editor. 

Present if available in the nanoLC. Use analog input to monitor voltages or values. The 

Analog Input data item is a 16-bit number that is proportional to the actual voltage or current 

present at the input pin. There are a maximum of 8 analog inputs. The number available 

depends on the configuration of the nanoLC. For more information on analog inputs, see 

Present if available in the nanoLC. Use analog outputs to set voltages or values. The Analog 

Output data item is a 16-bit number that is proportional to the actual voltage or current 

output. There are a maximum of 8 analog outputs. The number available depends on the 

nanoLC configuration selected. For more information on analog outputs, see “Handling 

The Message data type provides support for the optional display on the nanoLC. There are 

up to 32 messages with each message containing up to four lines of 20 characters.

Flags are single-bit variables that have a value of either 0 or 1. These are for general use to 

store a Boolean (TRUE/FALSE) variable. Although these are single-bit variables, they are 

not associated with discrete I/O points. There are a total of 64 binary user-definable flags. 

These flags are available for general project use. They can have an initial value (set=1) and 

may be retentive. In addition, there are System Flags that provide Runtime status and 

control (see Appendix B, “Technical Appendix – System Flags”).

Digital inputs are either ON or OFF (0 or 1). There are a maximum of 32 digital inputs. The 

number available depends on the nanoLC configuration selected.

Present if available in the nanoLC and configured. There are a maximum of two high-speed 

counters. If present, these may be enabled or disabled by project.