Siemens SIMATIC S7-1200 - Page 1312

Online and diagnostic tools
15.1 Status LEDs
S7-1200 Programmable controller
1312 System Manual, V4.2, 09/2016, A5E02486680-AK
Table 15- 2 Status LEDs for a signal module (SM)
Description
DIAG
(Red / Green)
I/O Channel
(Red / Green)
Field-side power is off
Flashing red
Flashing red
Not configured or update in progress Flashing green Off
Module configured with no errors
On (green)
On (green)
Error condition
Flashing red
-
I/O error (with diagnostics enabled)
-
Flashing red
I/O error (with diagnostics disabled)
-
On (green)