How to configure an absolute encoder interface (TSX CTY 2C)

At a Glance

Module TSX CTY 2C as well as having counting pulse inputs, has a specific interface for data acquisition:

of data from a series output absolute encoder (SSI),
or of data from one of four parallel output absolute encoders, with adaptation base(s) ABE-7CPA11.

Procedure

The table below shows the interface configuration steps.

Step	Action
1	Start the configuration using the general procedure for the TSX CTY 2C module until reaching the next entry screen Configure the input interface. Some headings are frozen, or not displayed, according to the type of encoder output (series or parallel).
2	Fill in the accessible headings according to the following table.
3	Confirm the new configuration. To do this: enable the entry screen above, scroll down the Edit menu and select the OK command.

Definitions and heading options

The table below shows the possible definitions and heading options on the Configure input interface screen according to the type of absolute encoder output.

Zone	Heading	SSI Series output encoder	Parallel output encoder(s)
Encoder	Binary or Gray	Coding type.	idem series output
	Measurement inversion	Invert the measurement change direction to a rotation direction given by the encoder.	idem series output
	Multiplexing	Does not exist.	Authorizes encoder multiplexing by the application.
SSI Frame	Transmission frequency	150, 200 (by default), 375, 500, 750 kHz or 1 MHz.	idem series output
	Line monitoring	Line check selection (rupture or short circuit).	Frozen: line check control present.
	Frame	Information: summary of the series frame characteristics.	idem series output
Header	No. of header bits	0 to 4 (0 by default)	Frozen at 0.
Data	No. of encoder data bits	8 to 25 (16 by default)	8 to 24 (24 by default)
	No. of masked MSBs	0 to 17 (0 by default)	0 to 16 (0 by default)
	Reducing the resolution	0 to 17 (least significant masked bits, 0 by default).	0 to 16 (0 by default).
	Limit: No. of encoder data bits – No. of most significant masked bits – No. of least significant masked bits > 8 active data bits.
	Rollover	Frozen (depending on the number of active data bits).	idem series output
Status	No. of status bits	0 to 4 (0 by default)	Frozen at 3.
	Error bit	none by default. To gain access to this choice, the number of status bits must be > 1.	none by default.
	Position	1 to 4 (1 by default). The heading only appears if the error bit is selected.	Frozen at 3. The heading only appears if the error bit is selected.
	Active at 0/1	Error bit active level (1 by default). The heading only appears if the error bit is selected.	idem series output
Parity	Parity bit	none by default. The choice of parity only appears if the bit is selected. If the parity is odd, the number of status bits is limited to 3.	Frozen: with, even parity.