Electrical Design
‑68‑
Table 3–24 Indicators of the single‑contact relay output card (IO‑R1)
Indicator
State Description
Solution
RUN/ERR Green indicator steady ON Normal running
state
N/A
Green indicator blinking The expansion card
is in initialization
state.
N/A
Green indicator OFF Waiting for
initialization of the
power supply unit
N/A
Red indicator steady ON Hardware fault Replace the
expansion card.
Red indicator blinking Data frame loss or
communication
disconnection with
the power supply
unit or drive unit
1. Check the
hardware
connection.
2. Check whether the
power supply unit or
drive unit is normal.
3. If the hardware
connection, power
supply unit, and
drive unit are
normal, replace the
expansion card.
Red and green indicators
blinking alternatively
Internal
communication bus
in the BUSOFF state,
and communication
restart in progress
Replace the
expansion card if the
state is not
recovered.
PWR
Yellow indicator steady ON Power normal N/A
Yellow indicator OFF Power supply
abnormal
Replace the
expansion card.
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