YASKAWA SGD7S Product Manual page 376

9.3 Monitoring Machine Operation Status and Signal Waveforms
9.3.3 Using a Measuring Instrument
Changing the Monitor Factor and Offset
You can change the monitor factors and offsets for the output voltages for analog monitor 1
and analog monitor 2. The relationships to the output voltages are as follows:
Analog monitor 1
output voltage
Analog monitor 2
output voltage
The following parameters are set.
Pn550
Pn551
Pn552
Pn553
Example
Adjusting the Analog Monitor Output
You can manually adjust the offset and gain for the analog monitor outputs for the torque refer-
ence monitor and motor speed monitor.
The offset is adjusted to compensate for offset in the zero point caused by output voltage drift
or noise in the monitoring system.
The gain is adjusted to match the sensitivity of the measuring system.
The offset and gain are adjusted at the factory. You normally do not need to adjust them.
9-10
Analog Monitor 1 Signal
= (-1) ×
Selection (Pn006 = n.XX)
Analog Monitor 2 Signal
= (-1) ×
Selection (Pn007 = n.XX)
Analog Monitor 1 Offset Voltage
Setting Range Setting Unit
-10,000 to 10,000
Analog Monitor 2 Offset Voltage
Setting Range Setting Unit
-10,000 to 10,000
Analog Monitor 1 Magnification
Setting Range Setting Unit
-10,000 to 10,000
Analog Monitor 2 Magnification
Setting Range Setting Unit
-10,000 to 10,000
• Example for Setting the Item to Monitor to the Motor Speed (Pn006 = n.00)
When Pn552 = 100 (Setting Unit: ×0.01)
Analog monitor output voltage (V)
+6 V
+ 6000
-6000
-6 V
Analog Monitor 1
×
Magnification (Pn552)

Analog Monitor 2
Magnification (Pn553)
Default Setting
0.1 V 0
Default Setting
0.1 V 0
Default Setting
×0.01
100
Default Setting
×0.01
100
Motor speed
(min -1 )
Analog Monitor 1
+
Offset Voltage (Pn550)
Analog Monitor 2
+
Offset Voltage (Pn551)
Speed Position
When Enabled
Immediately
Speed Position
When Enabled
Immediately
Speed Position
When Enabled
Immediately
Speed Position
When Enabled
Immediately
When Pn552 = 1,000 (Setting Unit: ×0.01)
Analog monitor output voltage (V)
Approx. +10 V
+8 V
+6 V
+6 00 +800
-800 -600
-6 V
-8 V
Approx. -10 V
Note: The effective linearity range is ±8 V.
The resolution is 16 bits.
Torque
Classification
Setup
Torque
Classification
Setup
Torque
Classification
Setup
Torque
Classification
Setup
Motor speed
(min -1 )