# Enterprise Communication Interface (ECI)

## Utility function: eci_set_par

### Description
Preparation for selecting a parameter.
### Syntax
int eci_set_par (eci_param *eci_par, int num_par)
### Input parameter
eci_par
Management structure for ECI parameter string
num_par
Consecutive number of parameter
### Return value
ECIOK | Set pointer to desired parameter part
ECIPREPFAIL | No data in parameter part
ECITOOBIG | No further parameter exists