Diagnostic Messages - Siemens SIMATIC ET 200SP Manual

ChannelLEDs
The LEDs A, B, N and DIm indicate the current level of the associated signals. The LEDs of
the digital outputs DQm indicate the desired state.
The flashing frequency of the channel LEDs is limited to approximately 12 Hz. If higher
frequencies are present, the channel LEDs will flash at 12 Hz instead of indicating the
current status.
If you are using an SSI absolute encoder, the LEDs D and C light up green during the
transmission of encoder frames. The LEDs D and C are off when an error has occurred.
Table 5- 3
Table 5- 4
5.2

Diagnostic messages

Diagnostic alarms
If a diagnostic alarm is pending, the DIAG LED flashes red.
The diagnostic alarms are displayed as clear text in STEP 7 (TIA Portal) in the online and
diagnostics view. You can evaluate the error codes with the user program.
The following diagnostics can be signaled:
Technology module TM PosInput 1 (6ES7138-6BA00-0BA0)
Manual, 02/2014, A5E33015755-AA
A/B/N/DIm/DQm status displays
A/B/N/DIm/DQm LEDs
Off
On
Status displays UP/DN
LEDs
UP DN
Off Off
On Off
Off On
Counter input/digital input/digital output at 0 level
Counter input/digital input/digital output at 1 level
No count pulse has been detected for the last 0.5 s.
The last count pulse incremented the counter and occurred no
more than 0.5 s ago.
The last count pulse decremented the counter and occurred no
more than 0.5 s ago.
Interrupts/diagnostic messages
5.2 Diagnostic messages
Meaning
Meaning
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