Rules Governing the Use of the S5-115F S5-115F Manual
Intermittent analog input signal (I/O type 16)
You can use all input ranges.
All Type 16 I/O modules must be subjected to a function test after any extended downtime. You
can dispense with the test if you configure Type 14 or 15.
Input ranges without wire-break monitoring by live zero
The following input ranges have no wire-break monitoring by live zero:
• 0 to 20 mA
• 0 to 1 V
• 0 to 10 V
If you use these input ranges, your program must contain a wire-break monitor.
Signal group number of the AI module and the relevant check AQ module
The signal group numbers of the AI module and the relevant check AQ channel must be identical.
You may use a check AQ channel for all AI modules of the same type (14 or 15) and the same signal
group number. If the AI channels have different signal group numbers, you must use different
check AQ channels.
Use of the FB 250 ANEI
You can use the FB ANEI in cyclic and time-driven programs. If you call the FB ANEI from a time-
interrupt service routine (OB 13), there are two possibilities available to you. These differ as to the
analog value used.
• DIR bit = 0 (FB ANEI)
The FB 250 ANEI accesses the cyclically updated analog value in the PII.
• DIR bit = 1 (FB ANEI)
The FB 250 ANEI reads the analog value direct from the module.
You will find more information on this in Vol. 2, Chapter 6 of the Manual ( Vol. 2, 6.1.3).
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EWA 4NEB 811 6148-02
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