Siemens S7-400PLC Spécifications télécharger pdf (Page 244)

Analog modules

5.17 Diagnostics functions of analog modules

S7-400 Automation System Module Data

244 Reference Manual, Edition 09/2009, A5E00850736-06

Causes of errors and remedies for analog input modules

Table 5- 44 Diagnostic messages of the analog input modules, causes of errors and remedies

Diagnostic message Possible cause of error Remedy

Module error Any, the module has detected an error. -

Internal error Module has detected an error within the

automation system.

External error Module has detected an error outside of

the automation system.

Channel error Indicates that only certain channels are

faulty

External auxiliary voltage

missing

Load voltage to supply the 2-wire

transducer is missing on terminals L+ and

Connect supply L+

Front connector missing Jumper between connections 1 and 2 in

the front connector is missing.

Install jumper

No module parameters Module requires information whether it

should operate with default system

parameters or with your parameters.

Message present after power on, until the CPU

has completed the transfer of parameters;

configure the module as required.

Incorrect parameters A parameter or combination of parameters

is incorrect; impermissible measurement

range, for example.

Reassign parameters to the module

Channel information

available

Channel error; module can provide

additional channel information.

Measuring range module

incorrect/missing

One or more measuring range modules is

missing or incorrectly inserted

Insert the measuring range modules on the

module according to the parameter assignment

of the type of measurement and the

measurement range

STOP mode No parameters have been assigned to the

module and the first module cycle has not

been completed.

If a reboot of the CPU all the digitized analog

values are in the intermediate memory, this

message is reset

EPROM error

RAM error

ADC/DAC error

Module is defective Replace the module

Hardware interrupt lost The module cannot send an interrupt,

since the previous interrupt was not

acknowledged; possible configuration

error.

Change the interrupt handling in the CPU

(change priority for interrupt OB; shorten

interrupt program).

Check the measuring range module Configuration /

programming error

Illegal parameters transferred to module

Reassign parameters to the module

Short-circuit to M A short-circuit to the M potential has

occurred on the sensor supply of 2-wire

transducers.

Eliminate the short-circuit.

Resistance of transducer circuit too high Use a different type of transducer, or modify the

wiring, for example, using a larger conductor

cross-section.

Open circuit between module and sensor Connect the cable

Disable channel ("Measuring type" parameter)

Wire break

Channel not connected (open)

Wire the channel

1 2 ... 239 240 241 242 243 244 245 246 247 248 249 ... 485 486

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