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