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262 Actual signals and parameters
Group 81: PFA control
Code
Description
Range
Resolution
Default
S
8103
REFERENCE STEP
1
0.0 … 100.0%
0.1%
0.0%
Sets a percentage value that is added to the process reference.
• Applies only when at least one auxiliary (constant speed) motor is running.
• Default value is 0%.
Example:
An ACS320 operates three parallel pumps that maintain water pressure in a
pipe.
• Parameter
sets a constant pressure reference that con-
trols the pressure in the pipe.
• The speed regulated pump operates alone at low water consumption levels.
• As water consumption increases, first one constant speed pump operates, then, the
second.
• As flow increases, the pressure at the output end of the pipe drops relative to the
pressure measured at the input end. As auxiliary motors step in to increase the flow,
the adjustments below correct the reference to more closely match the output pres-
sure.
• When the first auxiliary pump operates, increase the reference with parameter 8103
REFERENCE STEP 1.
• When both auxiliary pumps operate, increase the reference with parameter 8103
REFERENCE STEP 1 + parameter
• When three auxiliary pumps operate, increase the reference with parameter 8103
REFERENCE STEP 1 + parameter
+ parameter
8104
REFERENCE STEP
2
0.0 … 100.0%
0.1%
0.0%
Sets a percentage value that is added to the process reference.
• Applies only when at least two auxiliary (constant speed) motors are running.
• See parameter
8105
REFERENCE STEP
3
0.0 … 100.0%
0.1%
0.0%
Sets a percentage value that is added to the process reference.
• Applies only when at least three auxiliary (constant speed) motors are running.
• See parameter
Summary of Contents for ACS320 series
Page 1: ...ABB drives User s manual ACS320 drives 0 5 to 30 hp ...
Page 4: ......
Page 18: ...18 Safety ...
Page 28: ...28 Operation principle and hardware description ...
Page 56: ...56 Electrical installation ...
Page 142: ...142 Program features Connection diagram example ACS320 xx xxxx x ...
Page 282: ...282 Actual signals and parameters ...
Page 358: ...358 Fieldbus control ...
Page 376: ...376 Fault tracing ...
Page 382: ...382 Maintenance and hardware diagnostics ...
Page 407: ...Dimension drawings 407 Frame size R2 NEMA 1 Frame size R2 IP20 NEMA 1 3AUA0000051097 A ...
Page 409: ...Dimension drawings 409 Frame size R3 NEMA 1 Frame size R3 IP20 NEMA 1 3AUA0000051118 A ...
Page 411: ...Dimension drawings 411 Frame size R4 NEMA 1 Frame size R4 IP20 NEMA 1 3AUA0000051133 A ...
Page 412: ...412 Dimension drawings ...
Page 413: ...Index Numerics A B C D E F G H I K L M N O P R S T ...