In Jain worship (Chairyavandan), the Logassa Sutra is recited to venerate the 24 Tirthankaras. The full Logassa Sutra contains verses praising all 24 Tirthankaras by name. However, during the ritual of Chairyavandan, it is customary in many Jain traditions to recite only a part of the Logassa, up to “Chandesu Nimmaliyara” (which refers to Chandraprabhu and Neminath, the 8th and 22nd Tirthankaras respectively).

Reason for reciting only up to "Chendesu Nimmaliyara":

1. Tradition and Ritual Practice: This partial recitation is a matter of traditional practice rather than scriptural instruction. In certain sects and rituals, only a specific portion is recited as a mark of respect and to fit the structure and duration of the Chairyavandan ceremony.
2. Symbolic Representation: Often, the partial recitation is intended to represent all the Tirthankaras collectively, as the full list is recited in other parts of daily rituals.
3. Time Consideration: The Chairyavandan is a concise ritual compared to other, more elaborate forms of worship, and thus the recitation is shortened.
4. Sectarian Variations: Different Jain sects (like Shwetambar and Digambar) and even different traditions within these sects may have slightly different customs regarding how much of Logassa is recited during Chairyavandan.

Summary: The Logassa in Chairyavandan is recited only up to "Chendesu Nimmaliyara" mainly due to customary practice, brevity of the ritual, and symbolic representation. It is not because of any doctrinal mandate but rather due to the practical and traditional aspects of Jain worship.

If you wish to know the scriptural references or the meanings of the verses, please let me know!