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II K 4-23
Overview of Software
DCS400 accuracy
Analog values will be converted to digital values via
Anlog Digital Converter (ADC). The accuracy of res-
olution depends on how much bits are used and is
related to 100%. Bipolar values are marked at most
significant bit (sign bit).
Resolution of DCS400 inputs and outputs:
Resolution
Steps
Input / Output
Accuracy
Drive controlled by Serial Communication
15 Bit + sign
±20000
Speed reference/actual val.
0.005%
±4095
all other reference/actual val.
0.025%
Drive controlled by digital/analogue I/O
14 Bit + sign
±16383
Incremental Encoder
0.006%
12 Bit + sign
±4095
Current / Torque
0.025%
11 Bit + sign ±2047
AI1, AI2
0.05%
11 Bit + sign ±2047
AITAC (10V=125%)
0.06%
11 Bit + sign ±2047
AO1, AO2
0.05%
If serial communication is used all reference and
actual values are representet in a 16 bit data word
scaled b32767 and -32768. For speed refer-
ence/actual values only ±20000 are used, all other
reference/actual values are scaled to ±4095.
If tacho feedback is used the nominal speed value is
scaled to 80% of full resolution. A speed measure-
ment up to 125% of nominal speed is possible. The
accuracy is 0,06% related to nominal speed.
Fig. 4.3/1:
Comparison regarding the accuracy between the different control modes
M
DCS 400
COM
M
AO
AI
DCS 400
T
M
AO
AI
DCS 400
Drive controlled by Serial Communication
Speed reference
Fieldbus
Speed actual
value
Speed reference
accuracy
ELWVLJQ
Encoder 14 bit+sign
Speed accuracy = 0.006%
Drive controlled by digital I/O
Speed reference
AI (11 bit+sign)
AO (11 bit+sign)
Speed reference
accuracy
ELWVLJQ
Encoder 14 bit+sign
Speed accuracy = 0.006%
Drive controlled by digital I/O
Speed reference
AI (11 bit+sign)
AO (11 bit+sign)
Speed reference
accuracy
ELWVLJQ
Tacho 11 bit+sign
Speed accuracy = 0.06%
• No additional analogue/digital I/O's necessary
• Most flexibility regarding reference/actual value transmission
Speed actual
value
Speed actual
value
E
E
PLC
PLC
PLC
Содержание DCS 400
Страница 1: ...II K 1 1 DCS Thyristor power converter for DC drive systems 20 to 1000 A 9 to 522 kW Manual DCS 400 ...
Страница 24: ...II K 3 14 Technical data ...
Страница 29: ...II K 4 5 Overview of Software ...
Страница 158: ...II K 6 36 Operating Instructions ...
Страница 181: ...II K B 1 Appendix B Declaration of conformity ...
Страница 190: ...Notices ...
Страница 191: ...Notices ...