Parker
Hannifin
DAC Parameter/DAC number
0
1
…
31
DAC Output Value
P33280
P33296
…
P33776
Reserved P33281
P33297
…
P33777
DAC Gain
P33282
P33298
…
P33778
DAC Offset
P33283
P33299
…
P33779
Reserved P33284
P33300
…
P33780
Reserved P33285
P33301
…
P33781
Reserved P33286
P33302
…
P33782
Reserved P33287
P33303
…
P33783
ADC Parameter/ADC number
0
1
…
31
ADC Input Value
P33288
P33304
…
P33784
Reserved P33289
P33305
…
P33785
ADC Gain
P33290
P33306
…
P33786
ADC Offset
P33291
P33307
…
P33787
Reserved P33292
P33308
…
P33788
Reserved P33293
P33309
…
P33789
Reserved P33294
P33310
…
P33790
Reserved P33295
P33311
…
P33791
These tables appear similar to the other parameter tables for ACR
DACs and ADC’s, but there is no relationship in function. Nor do the
other DAC and ADC commands have any function for ACR9000
extended analog I/O. The DAC commands assume their use as
command outputs for drives, and ACR9000 does not have the type
of ADCs that are assumed by other ADC commands.
Saved Parameters
All the parameters required to set up the extended I/O network are
saved with the
ESAVE
command, and automatically recalled on
power up. In addition, some of the parameters determined by the
controller, such as the total number of analog and digital I/O, are
also saved with the
ESAVE
command. This allows an application to
compare the total I/O expected before the network is started with
the actual amount found when the network is started. The exact
parameters saved and recalled are P32768 through P32778, the
node IDs for each node, and the gains and offsets for all DAC and
ADC parameter blocks of each node.
Example 1
The following example uses two Parker I/O nodes. The first,
configured as node 3, has a PIO-337, four digital inputs, four digital
outputs, four analog inputs (0 to 10 VDC) and two analog outputs (0
to 10 VDC). The second, configured as node 4, has a PIO-347, four
digital inputs, four digital outputs, four analog inputs (0 to 10 VDC)
Additional Features 139
Содержание ACR Series
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Страница 89: ...Parker Hannifin Servo Loop Fundamentals 89 Figure 17 Following Error...