Siemens SIMATIC PCS 7 Operating Instructions

Diagnostic messages and possible corrective measures
The table below provides an overview of the diagnostic messages of the DI 16 x DC 24 V.
Table 10-4 Diagnostic messages of the DI 16 x DC 24 V and possible corrective measures
Diagnostic message Configurable Possible cause of error Corrective measure
No sensor or load
voltage
Yes Overload of sensor supply Eliminate the overload
Short-circuit of sensor supply to
M
Eliminate the short-circuit
Wire break Yes Interruption of the actuator con‐
nection
Check the wiring
No external auxiliary
voltage
No Supply voltage L+ of module
missing
Feed supply L+
Module-internal sup‐
ply voltage
failed
No Supply voltage L+ of module
missing
Feed supply L+
Module-internal fuse defective Replace the module
Module parameters
not assigned
No Startup error Reassign the module pa‐
rameters
Incorrect parameters No One parameter, or the combina‐
tion of parameters, is not plausi‐
ble
Reassign the module pa‐
rameters
Time monitoring trip‐
ped
No Intermittently high electromag‐
netic interference
Eliminate the interference
and switch the ET 200PA
SMART station off and on.
EPROM error No Module defective Replace the module
RAM error No Module defective Replace the module
No sensor or load voltage
When “No sensor supply" diagnostics is activated, failure of the sensor supply is always
signaled for all affected channels.
Reaction to failure of the supply voltage
The input value is initially held for the duration of 20 ms to 40 ms before the "0" signal is
transferred to the CPU. Supply voltage dips < 20 ms do not change the process value.
Failure of the supply voltage with redundant sensor supply infeed
Note
When an external redundant supply is applied to the sensor supply (Vs) and the L+ supply
voltage fails, failure of the sensor supply is not signaled. Instead, a failure of the internal and/or
external auxiliary voltage and/or a blown fuse is signaled.
ET 200PA SMART I/O modules
10.2 Digital input modules
ET 200PA SMART
136 Operating Instructions, 06/2019, A5E34192013-AB

Siemens SIMATIC PCS 7 Specifications

General

Brand	Siemens
Model	SIMATIC PCS 7
Category	Control Systems
Language	English