Analog setpoint - Revision history

Tero K: /* Differential signaling */

2015-05-15T12:23:24Z

‎Differential signaling

Tero K: /* Differential signaling */

2015-05-15T12:22:22Z

‎Differential signaling

Tero K at 21:18, 24 June 2013

2013-06-24T21:18:40Z

Tero K: moved Analog reference to Analog setpoint

2013-06-24T21:17:14Z

moved Analog reference to Analog setpoint

Tero K at 00:05, 14 June 2013

2013-06-14T00:05:53Z

Tero K at 00:05, 14 June 2013

2013-06-14T00:05:12Z

Tero K at 16:14, 24 March 2013

2013-03-24T16:14:08Z

WikiAdmin at 11:16, 18 April 2012

2012-04-18T11:16:28Z

WikiAdmin at 15:43, 11 April 2012

2012-04-11T15:43:06Z

130.230.150.235 at 14:38, 26 March 2012

2012-03-26T14:38:50Z

@@ Line 15: / Line 15: @@
 * Ground
 The actual setpoint value will be calculated from the differential of positive and negative inputs. This eliminates error from ground currents and also reduces sensitivity to EMI noise.
-{{tip|In typical servo drive, there are ANAIN+ and ANAIN- pins. Setpoint voltage is measured from the difference of voltage potentials between ANAIN+ and ANAIN-. Both ANAIN inputs must always lie within +/-12V from GND.}}
+{{tip|In typical servo drive, there are ANAIN+ and ANAIN- pins. Setpoint voltage is measured from the difference of voltage potentials between ANAIN+ and ANAIN-. Both ANAIN inputs must always lie within +/-12V from GND (meaning that [[controller]]'s zero voltage reference, i.e. GND must be connected to the GND if drive to prevent voltage potentials from floating.}}
 [http://en.wikipedia.org/wiki/Differential_signaling Differential signaling on wikipedia]

@@ Line 14: / Line 14: @@
 * Negative input
 * Ground
 The actual setpoint value will be calculated from the differential of positive and negative inputs. This eliminates error from ground currents and also reduces sensitivity to EMI noise.
 [http://en.wikipedia.org/wiki/Differential_signaling Differential signaling on wikipedia]

@@ Line 1: / Line 1: @@
 [[File:Noise1.gif|thumb|Analog reference signal is ideally clean and precise (blue). However, in problematic cases [[Electromagnetic interference|electromagnetic interference]] is coupled to the signal (red) causing inaccuracies like noise and offset error/drifting.]]
-Analog reference is one of [[Reference signal|reference signal]] types used in motion control.
+Analog setpoint is one of [[setpoint signal]] types used in motion control.
-The most typical reference voltage range is +/-10V where
+The most typical setpoint voltage range is +/-10V where
-* -10V equals the most negative reference (-100%)
+* -10V equals the most negative setpoint (-100%)
-* 0V equals zero reference
+* 0V equals zero setpoint
-* 10V equals most positive reference (+100%)
+* 10V equals most positive setpoint (+100%)
 * Any value between is interpolated linearly
-Another common voltage range is 0..5V where zero reference may be at 2.5 VDC (bias voltage).
+Another common voltage range is 0..5V where zero setpoint may be at 2.5 VDC (bias voltage).
 ==Differential signaling==
-Analog reference input in target device is typically differential. Differential input requires 3 wires from source device:
+Analog setpoint input in target device is typically differential. Differential input requires 3 wires from source device:
 * Positive input
 * Negative input
 * Ground
-The actual reference value will be calculated from the differential of positive and negative inputs. This eliminates error from ground currents and also reduces sensitivity to EMI noise.
+The actual setpoint value will be calculated from the differential of positive and negative inputs. This eliminates error from ground currents and also reduces sensitivity to EMI noise.
 [http://en.wikipedia.org/wiki/Differential_signaling Differential signaling on wikipedia]
 ==Example==
-Lets assume +/-10V is used as torque reference in VSD drive. In this case 0V equals no torque, and 10V equals 100% of peak torque configured in the drive, 5V equals 50% torque etc.
+Lets assume +/-10V is used as torque setpoint in VSD drive. In this case 0V equals no torque, and 10V equals 100% of peak torque configured in the drive, 5V equals 50% torque etc.
-Peak torque can be configured to drive with [[GDtool]] as peak current limit. Torque and current are directly proportional, so torque reference is also a current reference.
+Peak torque can be configured to drive with [[GDtool]] as peak current limit. Torque and current are directly proportional, so torque setpoint is also a current setpoint.
 [[Category:Signals]]
 [[Category:Glossary]]

← Older revision		Revision as of 00:05, 14 June 2013
Line 1:		Line 1:
−	[[File:Noise1.gif\|thumb\|Analog reference signal is ideally clean and precise. However, in problematic cases [[Electromagnetic interference\|electromagnetic interference]] is coupled to the signal causing inaccuracies like noise and offset error/drifting.]]	+	[[File:Noise1.gif\|thumb\|Analog reference signal is ideally clean and precise (blue). However, in problematic cases [[Electromagnetic interference\|electromagnetic interference]] is coupled to the signal (red) causing inaccuracies like noise and offset error/drifting.]]
	Analog reference is one of [[Reference signal\|reference signal]] types used in motion control.		Analog reference is one of [[Reference signal\|reference signal]] types used in motion control.

← Older revision		Revision as of 00:05, 14 June 2013
Line 1:		Line 1:
		+	[[File:Noise1.gif\|thumb\|Analog reference signal is ideally clean and precise. However, in problematic cases [[Electromagnetic interference\|electromagnetic interference]] is coupled to the signal causing inaccuracies like noise and offset error/drifting.]]
	Analog reference is one of [[Reference signal\|reference signal]] types used in motion control.		Analog reference is one of [[Reference signal\|reference signal]] types used in motion control.

← Older revision	Revision as of 21:17, 24 June 2013
(No difference)

← Older revision		Revision as of 16:14, 24 March 2013
Line 22:		Line 22:
	Peak torque can be configured to drive with [[GDtool]] as peak current limit. Torque and current are directly proportional, so torque reference is also a current reference.		Peak torque can be configured to drive with [[GDtool]] as peak current limit. Torque and current are directly proportional, so torque reference is also a current reference.
	[[Category:Signals]]		[[Category:Signals]]
		+	[[Category:Glossary]]

← Older revision		Revision as of 11:16, 18 April 2012
Line 21:		Line 21:

	Peak torque can be configured to drive with [[GDtool]] as peak current limit. Torque and current are directly proportional, so torque reference is also a current reference.		Peak torque can be configured to drive with [[GDtool]] as peak current limit. Torque and current are directly proportional, so torque reference is also a current reference.
−	[[Category:~~Signal~~]]	+	[[Category:Signals]]

← Older revision		Revision as of 15:43, 11 April 2012
Line 21:		Line 21:

	Peak torque can be configured to drive with [[GDtool]] as peak current limit. Torque and current are directly proportional, so torque reference is also a current reference.		Peak torque can be configured to drive with [[GDtool]] as peak current limit. Torque and current are directly proportional, so torque reference is also a current reference.
		+	[[Category:Signal]]