User Manual

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Siemens TX-I/O Engineering and installation guide CM110562en_13
Building Technologies Display, operation, and diagnostics 2019-05-15
DISPLAY
FAULT / INFORMATION
DETAILS
P-Bus BIM
Supply 1
Supply 2 1)
Modules 4)
RUN
LED
FAULT
LED
3)
AC24V
LED
DC24V
LED
2)
AC24V
LED
DC24V
LED
2)
AC24V
LED
1)
DC24V
LED
2)
Module
status
LED 2)
Other
LEDs
DC24V
from bus
2)
ON
OFF
ON
ON
ON
ON
ON
ON
ON
Normal
> 21.5V
Normal operation
An eventually defective supply in BIM or power supply
module is not recognized as long as DC 24 V > 21.5 V
ON
ON
ON
ON
ON
ON
ON
ON
Fl_3
Normal
16 … 20.5
Supply overloaded 2), 4)
Modules still operate, but send a message "voltage low"
ON
ON
ON
ON
ON
ON
ON
ON
OFF
OFF
< 16 V
Modules are inactive
OFF OFF OFF OFF ON ON ON ON Fl_3 Normal > 21.5V
BIM not connected
(AC 24 V) 2)
No communication, sufficient power
OFF
OFF
OFF
OFF
ON
ON
ON
ON
Fl_3
Normal
16 … 20.5
No communication, insufficient power
OFF
OFF
OFF
OFF
ON
ON
ON
ON
OFF
OFF
< 16 V
Modules are inactive
OFF
OFF
ON
ON
ON
ON
ON
ON
ON
Normal
> 21.5V
Supply 1 defective 2), 4)
sufficient power
ON
ON
ON
ON
ON
OFF
ON
ON
Fl_3
Normal
16 … 20.5
Modules still operate , but send a message "voltage low"
ON
ON
ON
ON
ON
OFF
ON
ON
OFF
OFF
< 16 V
Modules are inactive
ON
OFF
ON
ON
OFF
ON
ON
ON
ON
Normal
> 21.5V
Supply 1 not connected
(AC 24 V) 2, 4)
sufficient power
ON
ON
ON
ON
OFF
OFF
ON
ON
Fl_3
Normal
16 … 20.5
Modules still operate , but send a message "voltage low"
ON
ON
ON
ON
OFF
OFF
ON
ON
OFF
OFF
< 16 V
Modules are inactive
ON
ON
ON
ON
OFF
ON
ON
ON
Fl_3
I/O LED
Fl_3
> 21.5V
U10, Y10:
AC/DC 24 V field supply not
available on the module 4)
Affected module not receiving AC 24 V field supply from
supply 1 because fuse is blown, but supply DC 24 V is
operating
ON
ON
ON
ON
ON
ON
ON
ON
Fl_3
I/O LED
Fl_3
< 20.5V
I420, I25: DC 24 V- supply is
insufficient 4)
DC 24 V supply insufficient, overloaded, or too much
load on DC 24 V outputs (>200 mA per module) 2), 4)
1) Assumption: PS2 is OK in all cases
• Flashing patterns Fl_x see 9.4.2
• BIM, Power supply module see 9.2
• Module status LED: ON DC 24 V > 21.5V Power-up behavior (hysteressis 20.5 ... 21.5 V)
FI_3 DC 24V = 16 … 20.5 V Behavior on power-down / overload 4)
OFF DC 24 V < 16V Behavior on power-down / overload (hysteressis 16 ... 21.5 V)
ON when fault message received from one module via bus AND AC 24 V available in BIM
If the BIM identifies an error (Fault LED ON), the affected I/O modules are disabled.
The module transmits a fault message via island bus in the following cases:
– when DC 24 V drops below 20.5 V, monitored by the module (but not when DC 24 V exceeds 27 V)
– missing field supply AC/DC 24 V for U10, Y10 (monitored by the I/O points)
– missing field supply DC 24 V for I420, I25 (monitored by the I/O points)
2) DC 24 V LED
3) BIM Fault LED
Note
4) Fault message on bus