1 Master switch
2 Line safety switch
Fig. 27 Cross wiring with intermediate circuit coupling
9
Malfunctions
9.1
Diagnostics via LED
The device has 12 LEDs for the display of status information. Ten LEDs are located on the front side of
the device. Two LEDs are located on the top of the device at the connection [X19], XF1 IN and XF2 OUT.
The following image shows an example of the LEDs on the front side of the product variant CMMT-
AS-...-EC. Labelling and function of the LED Run and LED Error depend on the product variant.
1 Device status (4 LED)
2 Run (example CMMT-AS-...-EC)
3 Error (example CMMT-AS-...-EC)
4 Ethernet interface activated [X18]
5 Communication activity [X18]
6 Sync interface activated [X10]
7 Sensor status, sensor interface [X3]
8 Sensor status, sensor interface [X2]
Fig. 28 LEDs on the front side (example CMMT-AS-...-EC)
Malfunctions
77
Festo — CMMT-AS-C2/C4-3A-... — 2018-02
