II - DCE FEL ČVUT v Praze

SIMATIC S7 Ex Analog Modules
Influence of value
range for output
3-52
Triggering of a diagnostic interrupt is dependent on the parameterization (see
Section 3.6.3).
Table 3-29 Characteristics of analog modules dependent on position of analog input
value in value range
Process value in Input value SF LED Diagnostics Interrupt Channel
fault
LED
Rated range Process value – – – –
Overrange/
underrange
Process value – – – –
Overflow 7FFFH lit lit
Underflow 8000H lit
Entry made
1 )
Diagnostic
interrupt 1)
Wire break 7FFFH lit
lit
1)
1 ) interrupt 1)
lit1) Outside
parameterized
limit
1) depending on parameterization
Process value – – Hardware
interrupt
1)2)
2) A channel diagnostic error prevents the limit hardware interrupt.
Example: An enabled wire break diagnostics renders limits below the
wire break threshold ineffective.
The characteristics of the output modules depend on what part of the value
range the output values are in. Table 3-30 shows this dependency for analog
output values.
Table 3-30 Characteristics of analog modules dependent on position of analog
output value in value range
Output value in Output
value
SF LED Diagnostics Interrupt Channel
fault
LED
Rated range CPU value – – – –
Overrange/
underrange
CPU value – – – –
Overflow 0 mA – – – –
Wire break CPU value lit 1) Entry
made 1)
1) depending on parameterization
Entry
made 1)
lit 1)
I/O Modules with Intrinsically-Safe Signals
C79000-G7076-C152-04
–