Diagnostics And Troubleshooting; Led Display - Siemens MICROMASTER 420 Operating Instructions Manual

Issue 01/05
7

Diagnostics and troubleshooting

A standard combi LED is provided for troubleshooting. This combi LED displays the
module/network status and, alarms generated specifically from the CANopen
module and a diagnostics display parameter.
7.1

LED display

A two-color LED is provided on the front panel of the CANopen module. This
displays the operating status of the module.
An LED test is carried-out when the module is powered-up. The test proceeds as
follows: The LED is lit green for approximately 1 second and then it is red for 1
second and then it goes dark.
The following table explains the various states of the combi LED for the
module/network status.
Table 7-1
LED
On
Off
Flickering
Blinking
Single flash
Double Flash
Triple Flash
In the CANopen specification the RED part of the LED indicates the status of the
CAN physical layer and indicates errors due to missing CAN messages (SYNC,
NODE-GUARDING, etc).
The MICROMASTER 420/430/440 will support the following mandatory states of
the RED part of the LED and an MICROMASTER 420/430/440 specific option as
follows:
CANopen Option Module Operating Instructions
6SE6400-5BC00-0BP0
LEDs display types
Action
LED colour constantly ON
LED colour constantly OFF
iso phase on and off with a frequency of about 10 Hz (approximately
50 ms on / 50 ms off)
iso phase on and off with a frequency of about 2.5 Hz (approximately
200 ms on / 200 ms off)
One short 200 ms flash followed by off for 1 s
Two short 200 ms flashes followed by off for 1 s
Three short 200 ms flashes followed by off for 1 s
Diagnostics and troubleshooting
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