Operating mode 1st channel Bit 1 Bit 0
Current measurement 1 0
Temperature measurement (PT100) 1 1
Operating mode 2nd channel Bit 3 Bit 2
No operating mode 0 0
Voltage measurement 0 1
Current measurement 1 0
Temperature measurement (PT100) 1 1
Assigning parameters to the analog outputs
The analog outputs (AO) can be operated in the following operating modes:
Operating mode 3rd channel Bit 5 Bit 4
No operating mode 0 0
Voltage output 0 1
Current output 1 0
Impermissible operating mode 1 1
Operating mode 4th channel Bit 7 Bit 6
No operating mode 0 0
Voltage output 0 1
Current output 1 0
Impermissible operating mode 1 1
Feedback signal of the operating modes
The set operating modes are saved in the input image in Status Byte 0. This value must be
compared with Control Byte 0 in the output image. If these are dierent, an error has occurred,
e.g. in the case of overvoltage in the "Temperature measurement" operating mode, see
AUTOHOTSPOT.
12.2.4.3 Diagnostics via input image
Diagnostics input image
Byte Bit7 Bit6 Bit5 Bit4 Bit3 Bit3 Bit1 Bit0
d+0 count_2 count_1 count_0 T_Alarm_
2
T_Alarm_
1
Diag_2 Diag_1 Diag_0
d+1 Status_1
Connectable components
12.2PP 72/48D PN and PP 72/48D 2/2A PN
NCU 1750
140 Equipment Manual, 10/2023, A5E45627807B AH
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