Siemens SINAMICS S120 Installation And Start-Up Manual page 193

Table 6-2 Control Unit 320 – description of the LEDs after booting, continued
LED Color
– OFF
DP1
Continuous Cyclic communication is taking place.
(PROFIBUS (PROFIBUS
cyclic
operation)
Green Flashing
0.5 Hz
Red Continuous Cyclic communication has been interrupted.
– OFF
OPT OPT
Continuous Option board is ready.
(OPTION) (OPTION)
Green Flashing
0.5 Hz
Red Continuous
– OFF
MOD MOD
Green Continuous Reserved
E Siemens AG, 2004. All rights reserved
SINAMICS S120 Installation and Start-Up Manual, 12/04 Edition
Status
Cyclic communication has not (yet) taken place.
Note:
PROFIBUS is ready for communication when the
Control Unit is ready (see LED RDY).
Full cyclic communication is not yet taking place.
Possible causes:
S
The master is not transmitting setpoints.
S
No global control (GC) or master sign-of-life is
transmitted during isochronous operation.
Electronics power supply is missing or outside
permissible tolerance range.
Module is not ready.
Option board not installed or no associated drive
object has been created.
Depends on the option board used.
At least one fault is present in this module.
Option board not ready (e.g. after power-on).
Reserved
Description, cause
Diagnosis
Diagnostics using LEDs
Remedy
-
-
-
Remedy fault
-
-
-
Remedy and
acknowledge
fault
-
-
6-193