Switches in up/down counting mode (TSX CTY 2A, 4A, 2C)

General

These modules offer two storing switches in up/down counting mode (and also measurement mode where applicable for the TSX CTY2C module).

Switch SET (setting to 1) and RESET (setting to 0) conditions can be adjusted using combinations of:

17 basic conditions for TSX CTY2A/4A modules,
13 basic conditions for TSX CTY 2C modules.

These basic conditions are relative to:

Module	Overshooting by the current value of:	Captured value settings in relation to:	Events:
TSX CTY 2A/4A	thresholds and setpoints	thresholds and setpoints	enabling, preset and capture
TSX CTY 2C	thresholds and rollover	thresholds	enabling, preset and capture

Switch inputs

The following figure shows switch inputs in up/down counting mode. Also note manual inputs for setting to 0 and 1.

NOTE: switches 0 and 1 have the same basic SET and RESET conditions. If these happen at the same time the global RESET combination takes priority over the SET combination.

According to the type of module, some conditions cannot be set. Conditions and their priority status are listed later on.

Operating example

The time diagram below shows how switch 0 operates with the following adjustments:

If	Then: final state
Crossing threshold 0 in + direction	S
Captured value > threshold 0	R
Other conditions	-

Time diagram showing how switch 1 operates.

Basic conditions and priorities

The following tables shows the basic positioning conditions for switches 0 and 1 with their related priorities.

Priority	TSX CTY 2A/4A	TSX CTY 2C
Greater priority Lesser priority	Manual setting to 0 Manual setting to 1 RESET SET Enabling event Captured value position in relation to low setpoint Captured value position in relation to high setpoint Captured value position in relation to threshold 1 Captured value position in relation to threshold 0 Capture event Low setpoint crossing High setpoint crossing Threshold 1 crossing Threshold 0 crossing Preset event	Manual setting to 0 Manual setting to 1 RESET SET Enabling event Threshold 1 crossing Threshold 0 crossing Rollover crossing Captured value position in relation to threshold 1 Captured value position in relation to threshold 0 Capture event Preset event

NOTE: In reality, crossing setpoints, thresholds and rollovers group two conditions each time, according to the direction (+ or -) of the crossing.