Siemens NCU 7x0.3 PN Series Manual page 146

Connectable components
9.3 PP 72/48D 2/2A PN
Table 9- 68 Elimination of error for "alive and well" counter status "2"
Value Cause
byte 1
1 In the temperature
measurement operating
mode, an input voltage is
too high. The hardware may
become damaged/destroyed
as a result.
2 Reserved
3 Overload at the outputs
4 Incorrect operating mode
selection, e.g. temperature
measurement at the analog
outputs.
5 Internal error, system error
6 Range exceeded at the
inputs
7 Range exceeded at the
outputs
The analog outputs retain their last specified value.
1)
Diagnostics via status bytes 0/1
In status byte 0, the set operating modes are reflected e.g. "0x55" if control byte 0 = 0x55
has been specified (voltage on all channels).
In the event of an error, the error bit is set in status byte 1 (bit 7). In the event of an error in
one channel, all channels are deactivated.
Table 9- 69 Input image of analog inputs (excerpt)
Byte Bit7
m+0 0
m+1 Error bit
146
Effect
The "PNFault" LED is activated.
The outputs are disabled.
The value 0x80 is stored in status byte
1.
-
The "PNFault" LED is activated.
The outputs are disabled.
The value 0x80 is stored in status byte
1.
Selection of operating mode is rejected,
The "PNFault" LED is activated.
The outputs are disabled.
The value 0x80 is stored in status byte
1.
Bit6 Bit5
0 0
0 0
1)
1)
1)
Bit4 Bit3
0 0
0 0
Remedy
It is essential that a Pt100 element is
connected to terminals 3.4 or 7.8.
The module must be restarted with
Power ON after the error has been
eliminated.
-
Check the loads at the analog output.
The module must be restarted with
Power ON after the error has been
eliminated.
If selected correctly, the module
switches to cyclic operation.
The firmware has detected a system
error, this status can only be exited by
means of a switch-on / switch-off.
Check input circuit and adjust, if
required.
Correct the values in the user program.
Bit3 Bit1
0 0
0 0
Manual, 09/2011, 6FC5397-1EP40-0BA0
Bit0
0
0
NCU 7x0.3 PN