X20 system modules • X20 electronics module communication • X20CS2770
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X20 system User's Manual 3.10
4.18.8.4 LED status indicators
For a description of the various operating modes, see the 2.11.1 "re LEDs" section.
Figure
LED
Color
Status
Description
Off
No power to module
Single flash
RESET mode
Double flash
BOOT mode (during firmware update)
1)
Blinking
PREOPERATIONAL mode
r
Green
On
RUN mode
Off
No power to module or everything OK
Single flash
I/O error occurred
•
CAN bus: Warning, passive or off
•
Buffer overflow
e
Red
On
Error or reset status
e + r
Red on / Green single flash
Invalid firmware
Tx1/2
Yellow
On
The module is sending data via the CAN bus interface IF1/IF2
Rx1/2
Yellow
On
The module is receiving data via the CAN bus interface IF1/IF2
T1/2
Yellow
On
The integrated terminating resistor for the CAN bus interface IF1/IF2 is turned on
1)
Depending on the configuration, a firmware update can take up to several minutes.
4.18.8.5 Pinout
CAN High 1
CAN ground
Tx1
X2
0
C
S
27
70
r
e
Rx1
CAN Low 1
CAN ground
T1 T2
Tx2 Rx2
CAN High 2
CAN ground
CAN Low 2
CAN ground
4.18.8.6 Terminating resistors
On
Off
IF1 - Switch for terminating resistor
IF2 - Switch for terminating resistor
Two terminating resistors are integrated in the communication module. The respective resistor can be turned on
and off with a switch on the bottom of the housing. An active terminating resistor is indicated by the "T1" or "T2" LED.
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