Chapter 2 Analog input modules Manual VIPA System 200V
2-42 HB97E - SM-AIO - Rev. 12/32
Diagnostic interrupt
The diagnostic interrupt is enabled by means of bit 6 of byte 0. In this case
an error a 4byte diagnostic message will be issued to the master system.
Function-no.
Here you have to enter the function number of your measurement function
for 2 channels. The allocation of the function number to a measurement
function is available from the table above.
Option-Byte
Here you may specify for 2 channels the conversion rate.
Note!
Please note that the resolution is reduced when conversion rate is
increased due to the shorter integration time.
The format of the data transfer remains the same. The only difference is
that the lower set of bits (LSBs) loose significance for the analog value.
Structure of the option byte:
Byte Bit 7 ... Bit 0 Resolution Default
6 ... 9 Option byte:
Bit 3 ... 0: rate *
0000 15 conversions/s
0001 30.1 conversions/s
0010 60 conversions/s
0011 123.2 conversions/s
0100 168.9 conversions/s
0101 202.3 conversions/s
0110 3.76 conversions/s
0111 7.51 conversions/s
Bit 7 ... 4: reserved
16
16
15
14
12
10
16
16
00h
*) These specifications apply to 1channel operation. For multi-channel operations the conversion rate
per channel can be calculated by dividing the specified conversion rate by the number of active
channels.
Parameters
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