Chapter 4 Analog input/output modules Manual VIPA System 200V
4-6 HB97E - SM-AIO - Rev. 12/32
Wire break recognition
The bits 0 and 1 of byte 0 allow you to activate the wire break recognition
for the input channels. The wire break recognition is only available for the
current measuring range of 4...20mA. A wire break is recognized when the
current input during current measuring sinks under 1.18mA.
A wire break at activated wire break recognition causes an entry in the
diagnosis area. This is shown via the SF-LED.
If additionally a diagnostic interrupt is activated, a diagnosis message is
sent to the superordinated system.
Diagnostic interrupt
With the help of bit 6 of byte 0, you may release the diagnostic interrupt. In
case of an error, the
record set 0 with a size of 4byte is transferred to the
superordinated system.
More detailed information is to find below under "Diagnostic data".
CPU-Stop reaction and replacement value
With Bit 2 and 3 of byte 1 and byte 8 ... 11 you may set the reaction of the
module at CPU-Stop for every output channel.
Via Byte 8 ... 11 you predefine a replacement value for the output channel
as soon as the CPU switches to Stop.
By setting Bit 2 res. 3, the last output value remains in the output at CPU-
Stop. A reset sets the replacement value.
Function-no.
Here you set the function-no. of your measuring res. output function for
every channel. Please see the according table next page.
Meas. cycle
Here you may set the transducer velocity for every input channel. Please
regard that a higher transducer velocity causes a lower resolution because
of the lower integration time.
The data transfer format remains unchanged. Only the lower bits (LSBs)
are not longer relevant for the analog value.
Structure Meas. cycle Byte:
Byte Bit 7 ... Bit 0 Resolution Default
6 ... 7 Bit 3 ... 0: Velocity per channel
0000 15 conversions/s
0001 30 conversions/s
0010 60 conversions/s
0011 123 conversions/s
0100 168 conversions/s
0101 202 conversions/s
0110 3.7 conversions/s
0111 7.5 conversions/s
Bit 7 ... 4: reserved
16
16
15
14
12
10
16
16
00h
Parameter
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