Siemens S7-300 - Page 260

Analog modules
9.3 SM 336; F-AI 6 x 0/4 ... 20 mA HART
Fail-safe signal modules
260 Installation and Operating Manual, 01/2010, A5E00085586-10
Diagnostic message Possible causes of the problem Corrective measures
Excessive electromagnetic interference
at times
Eliminate the interference, and
 Switch the supply voltage of the F-
CPU/IM OFF/ON,
 Remove/insert F-SM, or
 Switch external auxiliary voltage of F-
SM OFF/ON
Defective module Replace the module
EPROM error
RAM error
Inconsistent firmware Repeat firmware update
Internal error during analog value test Replace the module ADC/DAC error
Impermissible U
CM
Eliminate the interference, and
 Switch the supply voltage of the F-
CPU/IM OFF/ON,
 Remove/insert F-SM, or
 Switch external auxiliary voltage of F-
SM OFF/ON
Firmware update successfully
performed
— —
 Firmware is faulty
 CRC error
 Switch the supply voltage of the F-
CPU/IM OFF/ON,
 Remove/insert F-SM, or
 Switch external auxiliary voltage of F-
SM OFF/ON
Then, repeat the firmware update.
Firmware update error
Defective module Replace the module
 Firmware is faulty
 Firmware update was canceled
Repeat the firmware update. Firmware version inconsistent
Supply voltage of module is missing Connect the module to the supply
voltage, and repeat the firmware update.
Discrepancy error Assigned tolerance window exceeded on
expiration of the discrepancy time
Extend the tolerance window and/or
discrepancy window
Wiring incorrect Check wiring, and
 Switch the supply voltage of the F-
CPU/IM OFF/ON,
 Remove/insert F-SM, or
 Switch external auxiliary voltage of F-
SM OFF/ON
Applied external voltage Remove the external voltage effect, and
 Switch the supply voltage of the F-
CPU/IM OFF/ON,
 Remove/insert F-SM, or
 Switch external auxiliary voltage of F-
SM OFF/ON
Short-circuit
(short-circuit to L+ of sensor
supply, ground short-circuit or
defective sensor supply)
Defective module Replace the module
Interruption of the measuring lead
between the module and sensor
Restore the cable connection Wire break
Incorrect measuring range setting Check the measuring range setting