Introduction to functions associated with counting modules

At a Glance

TSX CTY 2A, 4A and 2C modules offer several possibilities for processing unprocessed results in offline mode, according to the type of module, the type of sensor and the mode (counting function) selected. This chapter describes input configurations and the associated functions which are available.

Input configurations

Modules TSX CTY 2A, 4A and 2C have three counting inputs for each channel: IA, IB and IZ. These inputs cannot be changed round.

The TSX CTY 2C module also has an SSI series interface for each channel.

Advantages of associated functions

Associated functions are used to adapt modules to the application. As long as the main counting function for one module is similar enough to another, selecting the latter may depend on these other functions.

Common functions

The table below summarizes the main characteristics of the functions common to the three module types, and their availability according to the operating mode.

Function	Description	Availability
Invalid Measurement	Detecting a loss of pulse caused by defective operating conditions, or when capacity has been exceeded.	All modes.
Preset or reset	Pre-setting a counting register to a defined value (zero for a reset).	Resetting to zero in counting, presetting in down counting or up/down counting combined.
Capture	Storing an immediate up/down counting register value.	Only in combined up/down counting.
Comparison	Comparing a current value with a preset value (zero in down counting only). Comparing the captured value with a preset value.	All modes. Only in up/down counting.
Switches	Storing a preset temporary event.	All modes. Number of switches (one or two) varies according to the module and the mode.
Outputs	According to configuration: physical outputs linked to switches (reflexive outputs), or positioned by software (discrete "manual" outputs).	Number of outputs (one to four) variable according to the module and the mode.
Event processing	Several events can trigger a processing operation and a reflex action: enabling up or down counting, presetting or resetting, crossing the threshold or setpoint, capture (when up/down counting).	All modes

Specific function

Speed monitoring is only available with the TSX CTY 2C module.

One or two physical outputs can be linked to the comparators, and can then translate the result of the comparison between the immediate speed and a preset value.

Special functions (TSX CTY 2C)

The TSX CTY 2C module can also configure three special functions. These functions are derived from the previous standard functions, and they respond to the specific requirements of certain counting applications. These are:

Special Function Number 1: time elapsed since the last pulse and a capture.
Special Function Number 2: triggering a capture and a direct (software) preset synchronized with the programmable frequency output.
Special Function Number 3: monitoring the correct speed and stationary moving part. Tolerance values for the correct speed and stop speed can be configured.