Maintenance

General

The TSX CTY 2A/4A/2C modules are fitted with LEDs on the front panel, which make it possible to view the state of the module and the counting channels:

Module state LEDs (RUN, ERR, I/O)

These 3 LEDs provide information on the operation mode of the module:
- RUN indicates the state of the module operation,
- ERR signals an error inside the module,
- I/O signals an external module error or an application fault.
Channel state LEDs (CH.)

These are 2 or 4 LEDs, which make it possible to view and diagnose the state of each channel in the module.

Diagnostics

This table shows the diagnostics of the module according to the state of the LEDs:

	Lit	Flashing	Off
RUN	Module operative	/	Module switched off or experiencing a fault
ERR	Internal module error: module has broken down.	Communication error or awaiting configuration.	No error.
I/O	External module error: wiring fault, encoder supply error, measurement overrun. Application fault	/	No error.
CH TSX CTY 2A/2C CH0 and CH1 TSX CTY 4A CH0, CH1, CH2, CH3.	The channel is operational.	The channel is not functioning correctly due to: an internal fault, an external fault, a communication error, an application fault.	Channel inoperative: The channel is not configured, or is badly configured.

Illustration of module LEDs: