WAGO-I/O-SYSTEM 750
Process Image
27
750-451 8 AI RTD
Manual
Version 1.1.0
Table
17
: Control Byte
Control byte CH1_C0, byte 0
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Reg_Com = 0
0
–
–
–
–
–
–
Reg_Com = 1
0
Register number
Reg_Com
Register communication
0:
Register communication is switched OFF
1:
Register communication is switched ON
0
The bit is reserved and may not be used
–
Not used
Table
18
: Status Byte
Status byte CH1_S0, byte 0
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Reg_Com
Err_G
Wire
Break
Short
Circuit
User
Overrange
User
Underrange
Overrange Underrange
Reg_Com
This bit indicates which communication mode is enabled.
0:
Process data communication is enabled.
1:
Register communication is enabled.
Err_G
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”).
Wire Break
This bit indicates whether a wire break has been detected.
0:
No wire break present.
1:
Wire break present.
Short Circuit
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.
User Overrange
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.
User Underrange 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.
Overrange
This bit indicates whether the calculated resistance or temperature value exceeds the
measuring range set.
0:
Range not exceeded.
1:
Range exceeded.
Underrange
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.
