‑10‑
No.
Interface
Name
Function
①
Signal
indicators
PWR Power
indicator
Solid on (green) ON when power supply is
switched on.
RUN
Running
indicator
Off The module is initializing.
Flashing (green) The module is in parameter
configuration mode or
waiting to connect to the
master device.
Single flash
(green)
The module is in safe
operational mode (can read
inputs, cannot update
outputs).
Solid on (green) The module communication
is normal.
ERR
Communica‑
tion error
indicator
Off No communication error
Solid on (red) No expansion module
present. For details, see "
Fault Diagnosis
"
on page 23
Flashing (red) Inconsistent configuration of
expansion modules. For
details, see "
Fault Diagnosis
"
on page 23
Single flash (red) GL20‑RTU‑PN module offline
or expansion module
synchronization error
SF
Fault
indicator
Off Expansion module is normal
Solid on Local bus error. For details,
see "
Fault Diagnosis
"
on
page 23
Flashing (red) Expansion module fault. For
details, see "
Fault Diagnosis
"
on page 23
②
PROFINET
interface
P1: PROFINET interface 1
P2: PROFINET interface 2
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