Commissioning and Trial Run
‑142‑
Fault Name Panel
Display
Possible Cause Solution Fault Type
Hardware I/O
resource loss
A99.01 The selected DI
hardware resource does
not exist.
Check whether the power supply unit and
expansion cards are firmly installed.
Check parameters F4‑00 (DI1 hardware
source) to F4‑15 (DI8 function selection) of
the drive unit to ensure that no non‑existing
DI hardware resource is selected.
Axis fault
A99.02 The selected DO/RO
hardware resource does
not exist.
Check whether the power supply unit and
expansion cards are firmly installed.
Check the DO/RO hardware resources of the
drive unit to ensure that no non‑existing DO/
RO hardware resource is selected.
Axis fault
A99.03 The selected AI
hardware resource does
not exist.
Check whether the power supply unit and
expansion cards are firmly installed.
Check parameters F4‑25 (AI1 hardware
source) to F4‑29 (AI3 hardware source) of the
drive unit to ensure that no non‑existing AI
hardware resource is selected.
Axis fault
A99.04 The selected DI and DO/
RO hardware resources
do not exist.
Check whether the power supply unit and
expansion cards are firmly installed.
Check the drive unit according to the
solutions to A99.01 and A99.02.
Axis fault
A99.05 The selected DI and AI
hardware resources do
not exist.
Check whether the power supply unit and
expansion cards are firmly installed.
Check the drive unit according to the
solutions to A99.01 and A99.03.
Axis fault
A99.06 The selected DO/RO and
AI hardware resources
do not exist.
Check whether the power supply unit and
expansion cards are firmly installed.
Check the drive unit according to the
solutions to A99.02 and A99.03.
Axis fault
A99.07 The selected DI, DO/RO,
and AI hardware
resources do not exist.
Check whether the power supply unit and
expansion cards are firmly installed.
Check the drive unit according to the
solutions to A99.01, A99.02, and A99.03.
Axis fault
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