Diagnostics Via Input Image - Siemens NCU 7x0.3 PN Series Manual

9.3.5.5

Diagnostics via input image

Table 9- 65 Diagnostics input image
Byte Bit7
d+0 count_2
d+1
Table 9- 66
Bit
7
6
5
4
3
2
1
0
Note
The "alive and well" counter is a 3 bit modulo counter at the PP application level. The PP
application can be monitored using this counter. Failure of the application software does not
generally result in a communication failure, as this is developed in a hardware-supported
manner. The watch dog switches off the digital outputs, while the inputs remain at their last
set values.
Table 9- 67
"alive and
well" counter
0
1
2
3 ... 7
NCU 7x0.3 PN
Manual, 09/2011, 6FC5397-1EP40-0BA0
Bit6 Bit5
count_1 count_0
Messages in byte 0
Signal name Message
count_2 alive and well 2
count_1 alive and well 1
count_0 alive and well 0
T_Alarm_2 Temperature not within the operating temperature range defined for the
module
T_Alarm_1 Critical temperature exceeded
Diag_2 Overload DO byte 5/4
Diag_1 Overload DO byte 3/2
Diag_0 Overload DO byte 1/0
Overview of the messages in byte 1, depending on the "alive and well" counter
Value Message
byte 1
0 Reserved
Temperature value
0 No error
1 Impermissible input voltage in the temperature measurement mode
2 Reserved
3 Overload at the outputs
4 Incorrect operating mode selection
5 Internal error, system error
6 Range exceeded at the inputs
7 Range exceeded at the outputs
0 Reserved
Bit4 Bit3
T_Alarm_2 T_Alarm_1
Status_1
Connectable components
9.3 PP 72/48D 2/2A PN
Bit3 Bit1
Diag_2 Diag_1
Bit0
Diag_0
145