  Dynamics of the driven Frenkel-Kontorova model with asymmetric deformable
substrate potential is examined by analyzing response function, the largest
Lyapunov exponent and Poincar\'{e} sections for two neighboring particles. The
obtained results show that the largest Lyapunov exponent, besides being used
for investigating integral quantities, can be used for detecting microchanges
in chain configuration of both damped Frenkel-Kontorova model with inertial
term and its strictly overdamped limit. Slight changes in relative positions of
the particles are registered through jumps of the largest Lyapunov exponent in
the pinning regime. The occurrence of such jumps is highly dependent on type of
commensurate structure and deformation of substrate potential. The obtained
results also show that the minimal force required to initiate collective motion
of the chain is not dependent on the number of Lyapunov exponent jumps in the
pinning regime. These jumps are also registered in the sliding regime, where
they are a consequence of a more complex structure of largest Lyapunov exponent
on the step.
