Tex. Code Crim. Proc. art. 35.01

When a case is called for trial and the parties have announced ready for trial, the names of those summoned as jurors in the case shall be called. Those not present may be fined not less than $100 nor more than $500. An attachment may issue on request of either party for any absent summoned juror, to have him brought forthwith before the court. A person who is summoned but not present, may upon an appearance, before the jury is qualified, be tried as to his qualifications and impaneled as a juror unless challenged, but no cause shall be unreasonably delayed on account of his absence.