Analog Outputs - Allen-Bradley PowerFlex 70 Reference Manual

Analog Outputs

Explanation
Each drive has one or more analog outputs that can be used to annunciate a
wide variety of drive operating conditions and values.
The user selects the source for the analog output by setting [Analog Outx
Sel].
342 [Analog Out1 Sel]
345 [Analog Out2 Sel]
Vector
Selects the source of the value that
drives the analog output.
Options
0 "Output Freq"
1 "Command Freq"
1* "Commanded Spd"
2 "Output Amps"
3 "Torque Amps"
4 "Flux Amps"
5 "Output Power"
6 "Output Volts"
7 "DC Bus Volts"
8 "PI Reference"
9 "PI Feedback"
10 "PI Error"
11 "PI Output"
12 "%Motor OL"
13 "%Drive OL"
14* "CommandedTrq"
15* "MtrTrqCurRef"
16* "Speed Ref"
17* "Speed Fdbk"
18* "Pulse In Ref"
* Vector Control Option Only
Configuration
The PowerFlex 70 standard I/O analog output is permanently configured as
a 0 -10 volt output. The output has 10 bits of resolution yielding 1024 steps.
The analog output circuit has a maximum 1.3% gain error and a maximum
7 mV offset error. For a step from minimum to maximum value, the output
will be within 0.2% of its final value after 12ms.
The PowerFlex 700 standard I/O analog output is permanently configured
as a 0-10 volt output. The output has 10 bits of resolution yielding 1024
steps. The analog output circuit has a maximum 1.3% gain error and a
maximum 100 mV offset error. For a step from minimum to maximum
value, the output will be within 0.2% of its final value after 12ms.
Absolute (default)
Certain quantities used to drive the analog output are signed, i.e. the
quantity can be both positive and negative. The user has the option of
having the absolute value (value without sign) of these quantities taken
before the scaling occurs. Absolute value is enabled separately for each
analog output via the bitmapped parameter [Anlg Out Absolut].
Important: If absolute value is enabled but the quantity selected for output
is not a signed quantity, then the absolute value operation will
have no effect.
Default: 0 "Output Freq"
Options: See Table
[Analog Out1 Lo] Value
Param. 341 = Signed Param. 341 = Absolute
–[Maximum Speed] 0 Hz
–[Maximum Speed] 0 Hz
–[Maximum Speed] 0 Hz/RPM
0 Amps 0 Amps
–200% Rated 0 Amps
0 Amps 0 Amps
0 kW 0 kW
0 Volts 0 Volts
0 Volts 0 Volts
–100% 0%
–100% 0%
–100% 0%
–100% 0%
0% 0%
0% 0%
–800% 0%
–800% 0%
–[Maximum Speed] 0 Hz
–[Maximum Speed] 0 Hz
–25200.0 RPM 0 RPM
Analog Outputs 2-19
001
002
003
004
005
007
006
[Analog Out1 Hi] Value
012
+[Maximum Speed]
135
+[Maximum Speed]
136
+[Maximum Speed]
137
200% Rated
138
200% Rated
220
200% Rated
219
200% Rated
120% Rated Input Volts
200% Rated Input Volts
100%
100%
100%
100%
100%
100%
+800%
+800%
+[Maximum Speed]
+[Maximum Speed]
+25200.0 RPM