Behavior And Diagnostics Of The Sm 321; Di 16 X 24 Vdc; Dependencies Of Input Values On The Operating Mode Of The Cpu And Supply Voltage L+ Of The Sm 321; Di 16 X Vdc; Diagnostic Messages Of The Sm 321; Di 16 X Vdc - Siemens SIMATIC S7-300 Reference Manual

3.9.3

Behavior and Diagnostics of the SM 321; DI 16 x 24 VDC

Effect of operating and mode supply voltage on the input values
The input values of the SM 321; DI 16 x 24 DC depend on the operating mode of
the CPU and on the supply voltage of the module.
Table 3-11 Dependencies of Input Values on the Operating Mode of the CPU and Supply
CPU Operating State
POWER ON
POWER OFF –
Diagnostic Messages of the SM 321; DI 16 x 24 VDC
The table below presents an overview of the diagnostic messages for the SM 321;
DI 16 x 24 VDC.
Table 3-12 Diagnostic Messages of the SM 321; DI 16 x VDC 24
Diagnostics Message
Sensor supply missing
Wire-break
Module not parameterized.
External auxiliary supply missing
Internal auxiliary power missing
Fuse blown
Incorrect parameter on module
Watchdog timeout
EPROM error
RAM error
Hardware interrupt lost
Programmable Logic Controllers S7-300 Module Data
A5E00105505-03
Voltage L+ of the SM 321; DI 16 x VDC 24
Power Supply L+
to Digital Module
RUN L+ exists
L+ missing
STOP L+ exists
L+ missing
L+ exists
L+ missing
Input Value of Digital
Process value
0 signal
Process value
0 signal
–
–
LED Scope of the Diagno-
stics
SF Channel group
SF Channel group
SF Channel group
SF Module
SF Module
SF Module
SF Module
SF Module
SF Module
SF Module
SF Module
Digital Modules
Module
Parameters
can be
assigned
Yes Yes
No No
3-29