Status Leds; Maximum Cable Lengths - HMS CM CANopen User Manual

4.2 Status LEDs

Three status LEDs indicate the status of the module as shown in the table be-
low. The DIAG LED is visible on the front of the module and the other two
are found behind the lid at the top of the module. The behavior of the LEDs
is described in "Status LED Timing Diagrams" on page 56
LED
DIAG (red/green)
ERR - CANopen
error (red)
RUN - CANopen
state (green)

4.3 Maximum Cable Lengths

When designing the CANopen network, please take into account the maximum cable length for differ-
ent baud rates.
Baud rate (kilobaud) Maximum cable length (m)
20
50
125
250
500
800
1000
CM CANopen Module for SIMATIC S7-1200
Doc.Rev. 1.00
Indication Status
Green Normal operation
Blinking green Hardware address not configured yet
Blink red CM bus error state.
Note: This LED only report errors on the
CM backplane bus. Diagnostic errors are
indicated by the error LED on the PLC.
Off Normal operation
Blinking General configuration error
Single flash Warning limit reached in CAN controller, for
example due to bad or no signal on the
CANopen network.
Double flash A nodeguard event or a heartbeat event
has occurred.
Triple flash Sync error. The sync message has not
been received within the configured com-
munication cycle time
1 Hz Fatal error, contact support.
On The CAN controller is bus off.
Off No power, not configured or no CANopen
network
Blinking Pre-operational
Single flash Stopped
Triple flash Transparent CAN mode
On Operational
2500
1000
500
250
100
50
25
Installation 8
Doc.Id. HMSI-216-117