read_data / dump files for two element system

Dear Lammps experts,
I have atoms of two types: Fe, C (I use potential eam/fs). Atoms are located in file “input_data”. I found that in dump file all atoms have type C. How I can indicate type of atom and where I can do it (when I reading or when I write in dump)? Thank you in advance.

Force field:

pair_style eam/fs
pair_coeff * * Fe-C_Hepburn_Ackland.eam.fs Fe C

For reading data I use command:
read_data input_data

For dump I use command:
dump 1 all cfg 250 dump.comp_*.cfg mass type xs ys zs

Fragment from file “input_data”:

29640 atoms
2 atom types

0 58.000000 xlo xhi
0 58.000000 ylo yhi
0 58 zlo zhi

Masses

1 55.845000
2 12.010700

Atoms

1 1 2.900000 2.900000 2.900000 0 0 0
2 1 5.800000 2.900000 2.900000 0 0 0
3 1 8.700000 2.900000 2.900000 0 0 0
4 2 11.600000 2.900000 2.900000 0 0 0

Fragment from file “dump0.”:

Number of particles = 29640
A = 1 Angstrom (basic length-scale)
H0(1,1) = 58 A
H0(1,2) = 0 A
H0(1,3) = 0 A
H0(2,1) = 0 A
H0(2,2) = 58 A
H0(2,3) = 0 A
H0(3,1) = 0 A
H0(3,2) = 0 A
H0(3,3) = 58 A
.NO_VELOCITY.
entry_count = 3
55.847000
C
0.05 0.05 0.05
55.847000
C
0.05 0 0.05
55.847000
C
0.025 0.025 0.05
55.847000
C

Use “dump_modify” with “element” keyword, in order to associate elements to atom types.
Julien