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WAGO-I/O-SYSTEM 750
750-451 8 AI RTD
17
Table
: Control Byte
Bit 7
Reg_Com = 0
Reg_Com = 1
Reg_Com
0
–
18
Table
: Status Byte
Bit 7
Reg_Com
Reg_Com
Err_G
Wire Break
Short Circuit
User Overrange
User Underrange
Overrange
Underrange
Manual
Version 1.1.0
Control byte CH1_C0, byte 0
Bit 6
Bit 5
0
–
0
Register communication
0:
Register communication is switched OFF
1:
Register communication is switched ON
The bit is reserved and may not be used
Not used
Status byte CH1_S0, byte 0
Bit 6
Bit 5
Bit 4
Err_G
Wire
Short
Break
Circuit
This bit indicates which communication mode is enabled.
0:
Process data communication is enabled.
1:
Register communication is enabled.
This bit generally indicates whether an underrange, overrange, short circuit or wire break
has been detected.
0:
No error present.
1:
General error present (see section "Diagnostics").
This bit indicates whether a wire break has been detected.
0:
No wire break present.
1:
Wire break present.
This bit indicates whether the corrected raw value falls below the limiting value for short
circuit detection or whether the ADC reports a reference voltage error.
0:
No short circuit present.
1:
Short circuit present.
This bit indicates whether the limiting value specified by the user exceeds the calculated
resistance or temperature value.
0:
Limiting value not overrange.
1:
Limiting value overrange.
This bit indicates whether the limiting value specified by the user falls below the
calculated resistance or temperature value.
0:
Limiting value not underrange.
1:
Limiting value underrange.
This bit indicates whether the calculated resistance or temperature value exceeds the
measuring range set.
0:
Range not exceeded.
1:
Range exceeded.
This bit indicates whether the calculated resistance or temperature value falls below the
measuring range set.
0:
There is no underrange.
1:
There is an underrange.
Bit 4
Bit 3
–
–
Register number
Bit 3
Bit 2
User
User
Overrange
Underrange
Process Image
Bit 2
Bit 1
–
–
Bit 1
Bit 0
Overrange Underrange
27
Bit 0
–
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