Functions
8.6 Analog outputs (D/A converter)
Control Units CU240S
8-20 Operating Instructions, 11/2006, A5E00766042B AA
8.6 Analog outputs (D/A converter)
Data
Quantity: 2
Parameter range: r0770 … P0785
Function chart number: FP2300
Features:
• cycle time:
4 ms
• resolution:
12 bit
• accuracy:
1 % referred to 20 mA
Description
Two analog outputs are provided which can be programmed to indicate a variety of
variables. Some of the more popular settings are pre-selected (see table below), but others
(BICO outputs) can be allocated using the BICO internal connection feature.
Table 8-7 Pre-set analog outputs
Parameter Description
r0020 CO: Frequency setpoint before RFG
r0021 CO: Actual filtered frequency
r0024 CO: Actual filtered output frequency
r0025 CO: Actual filtered output voltage
r0026 CO: Actual filtered DC-link voltage
r0027 CO: Actual filtered output current
… …
r0052 CO/BO: Actual status word 1
r0053 CO/BO: Actual status word 2
r0054 CO/BO: Actual control word 1
… …
In order to adapt the signal, the D/A converter channel has several function units (filter,
scaling, dead zone) which can be used to modify the digital signal before conversion (see
figure below).
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