Siemens SIMATIC ET 200SP - Page 75

Interrupts/diagnostic messages
6.2 Status and error display
ET 200SP F-TM Count 1x1Vpp sin/cos HF (6ES7136-6CB00-0CA0)
Equipment Manual, V1.0, 01/2021, A5E47073911-AA
73
N LED
The N LED indicates the current level of the counter N pulse signal from the encoder. The N
LED will show the state of the N signal only when the encoder is configured as A/B with N.
The N LED will be in the ON state if the N signal is disconnected (but configured).
Table 6- 3 Meaning of the N LED
N
Meaning
Off
Counter N signal is at 0 level
On
Counter N signal is at 1 level
UP/DN LEDs
The UP and DN LEDs indicate the logical counting direction.
Table 6- 4 Meaning of the UP and DN LEDs
UP
DN
Meaning
Off
Off
No count has been detected within the last 0.5 s.
On
Off
The last count has incremented the counter and took place no more than 0.5 s ago.
Off
On
The last count has decremented the counter and took place no more than 0.5 s ago.
PWR LED
Table 6- 5 Meaning of the PWR LED
PWR
Meaning
Off
Supply voltage missing
On
Supply voltage is present and OK