Siemens SINUMERIK 828D Series User Manual

4.2 PPU 27x.4
4.2.1 PPU status displays
Status displays front side
On the front side of the PPU, the following status displays provide information about the module
state:
5'<
1&
&)
/LQN
$FWLYLWL\
Figure 4-3 Vertical flap (detail)
LEDs and the slots for the CompactFlash card are not available on the front of the PPU 27x.
4.
The three LEDs located behind the front flap at the front of the PPU have the following
significance:
Name Color State Meaning
RDY Green Is lit NC Ready and PLC in run mode.
Yellow Is lit PLC in stop mode
Flashing Booting
Red Is lit NC in stop mode:
● When booting, if NC Ready is not yet available
● Critical fault (power off/on necessary)
NC Yellow Cyclic flashing NC operation
CF Yellow Is lit User CompactFlash Card being accessed
NOTICE
Damage to the CompactFlash card when it is withdrawn in operation
The CompactFlash card can be destroyed if it is withdrawn or inserted in operation.
Therefore, do not withdraw the CompactFlash card if an LED is lit.
Service cases - hardware
4.2 PPU 27x.4
Software and hardware
Service Manual, 08/2018, 6FC5397-5DP40-6BA1 83

Siemens SINUMERIK 828D Series Specifications

General

Brand	Siemens
Model	SINUMERIK 828D Series
Category	Control Unit
Language	English