Siemens et 200sp - Page 145

Interrupts/diagnostic messages
5.1 Status and error displays
Technology Module TM Pulse 2x24V (6ES7138‑6DB00‑0BB1)
144 Manual, 05/2019, A5E35061186-AB
Meaning of the LED displays
The following tables explain the meaning of the status and error displays. Corrective
measures for diagnostics alarms can be found in the section Diagnostic messages
(Page 145).
Table 5- 1 Status and error displays DIAG
LED DIAG
Meaning
Solution
Off
Backplane bus supply of the ET 200SP not OK Check or switch on the supply voltage on the CPU
or on the interface module.
Flashes
Technology module parameters not assigned —
On
Technology module parameters assigned but no module diagnos-
tics
Flashes
Technology module parameters assigned and module diagnostics
(at least one error pending)
Evaluate the diagnostics alarms and eliminate the
error.
Table 5- 2 Status displays PWR/24VDC
LEDs
Meaning
Solution
PWR
24VDC
Off Off
Supply voltage missing
• Check the supply voltage.
• Check the BaseUnit type and the wiring of the
BaseUnit.
On
On
Supply voltage is present and OK. Sensor supply
is OK.
—
On Off
Short-circuit or overload at the sensor supply or
supply voltage too low
• Check the sensor wiring.
• Check the loads connected to the sensor
supply.
• Check the supply voltage.
Channel LEDs
The DIn.0 LEDs indicate the current level of the associated signals. The LEDs of the digital
outputs DQn.A and DQn.B 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 do not indicate the current status but instead
flash at 12 Hz.
Table 5- 3 Status displays DIn.0/DQn.A/DQn.B
LEDs DIn.0/DQn.A/DQn.B
Meaning
Off
Digital input / digital output at 0 level
On
Digital input / digital output at 1 level