Siemens ET 200S - Page 360

Analog Electronic Modules
12-4
Distributed I/O System ET 200S
EWA 4NEB 780 6024-02 07
Measured Values in the Case of a Wire Break Depending on Diagnostic Being
Enabled
The rules and additions outlined below apply to the following measuring ranges:
 1 V to 5 V, 4 mA to 20 mA
 Temperature sensor Pt xxx Standard and Climatic, Ni xx Standard and Climatic,
Cu 10 Standard and Climatic
 Thermocouple type E, N, J, K, L, S, R, B, C, T
Table 12-1 Measured Values in the Case of a Wire Break Depending on Diagnostic Being Enabled
Format
Parameter Assignment Measured Values Description
Decimal Hexadec.
S7  “Wire break” enabled (at
1 to 5 V, 4 to 20 mA,
RTD)
1
32767 7FFF
H
 “Open circuit” diagnostic
message
 “Wire break check”
enabled
(in the case of TC)
32767 7FFF
H
 “Open circuit” diagnostic
message
 “Wire break” disabled (at
1 to 5 V, 4 to 20 mA,
RTD)
1
 “Overflow/underflow”
enabled
–32767 8000
H
 Measured value after
leaving the underrange
 “Lower limit value violated”
diagnostic message
 “Wire break” disabled (at
1 to 5 V, 4 to 20 mA,
RTD)
1
 “Overflow/underflow”
disabled
–32767 8000
H
 Measured value after
leaving the underrange
 “Wire break check”
disabled
(in the case of TC)
–––
–––
 Open input: undefined
measured value
1
Measuring range limits for detecting the wire break/underflow:
1 to 5 V: at 0.296 V
4 to 20 mA: at 1.185 mA