ACC-72EX User Manual
Diagnostics
107
DeviceNet
– Master – OPT20
The following table describes the meaning of the LEDs for the comX communication modules when the
firmware of the DeviceNet Master protocol is loaded to the comX communication module:
MNS LED (COM0)
Color
State
Meaning
Green
On
Device is online and has established one or more
connections
Green
Flashing
Device is online and has established no connection
Green/Red
Green/Red/Off
Self-test after power on:
Green on for 0,25 s, then red on for 0,25 s, then off
Red
Flashing
Connection timeout
Red
On
Critical connection failure; device has detected a network error: duplicate MAC-
ID or severe error in CAN network (CAN-bus off)
Red
Off
After start of the device and during duplicate MAC-ID check
DeviceNet
– Slave – OPT21
The following table describes the meaning of the LEDs for the comX communication modules when the
firmware of the DeviceNet Slave protocol is loaded to the comX communication module:
MNS LED (COM0)
Color
State
Meaning
Green
On
Device is online and has established one or more
connections
Green
Flashing
Device is online and has established no connection
Green/Red
Green/Red/Off
Self-test after power on:
Green on for 0,25 s, then red on for 0,25 s, then off
Red
Flashing
Connection timeout
Red
On
Critical connection failure; device has detected a network error: duplicate MAC-
ID or severe error in CAN network (CAN-bus off)
Red
Off
After start of the device and during duplicate MAC-ID check
CANopen
– Master – OPT30
The following table describes the meaning of the LEDs for the comX CANopen Master communication
modules (COMX-CA-CO/ COMX-CNCOM) when the firmware of the CANopen Master protocol is
loaded to the comX communication module:
CAN LED (COM0)
Color
State
Meaning
Green
Off
The device is executing a reset
Green
Single Flash
STOPPED: The Device is in STOPPED state
Green
Blinking
PREOPERATIONAL: The Device is in the PREOPERATIONAL state
The indicator turns on and off with a frequency of 2,5 Hz: on for 200 ms,
followed by off for 200 ms.
Green
On
OPERATIONAL: The Device is in the OPERATIONAL state
Red
Single flash
Warning Limit reached: At least one of the error counters of the CAN controller
has reached or exceeded the warning level (too many error frames).
The indicator shows one short flash (200 ms) followed by a long off phase
(1,000 ms).
Red
Double flash
Error Control Event: A guard event (NMT Slave or NMTmaster) or a heartbeat
event (Heartbeat consumer) has occurred.
The indicator shows a sequence of two short flashes (each 200 ms), separated
by a short off phase (200 ms). The sequence is finished by a long off phase
(1,000 ms).
Red
On
Bus Off: The CAN controller is bus off