YASKAWA SGD7S Product Manual page 364

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
= (−1) ×
output voltage
Analog monitor 2
= (−1) ×
output voltage
The following parameters are set.
Analog Monitor 1 Offset Voltage
Pn550 Setting Range
-10,000 to 10,000
Analog Monitor 2 Offset Voltage
Pn551 Setting Range
-10,000 to 10,000
Analog Monitor 1 Magnification
Pn552 Setting Range
-10,000 to 10,000
Analog Monitor 2 Magnification
Pn553 Setting Range
-10,000 to 10,000
• Example for Setting the Item to Monitor to the Motor Speed (Pn006 = n.00)
Example
When Pn552 = 100 (Setting Unit: ×0.01)
Analog monitor output voltage (V)
-6000
-6 V
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.
9.3 Monitoring Machine Operation Status and Signal Waveforms
Analog Monitor 1 Signal
×
Selection (Pn006 = n.XX)
Analog Monitor 2 Signal
×
Selection (Pn007 = n.XX)
Setting Unit Default Setting
0.1 V
Setting Unit Default Setting
0.1 V
Setting Unit Default Setting
×0.01
Setting Unit Default Setting
×0.01
+6 V
+ 6000
Motor speed
(min -1 )
9.3.3 Using the Analog Monitors
Analog Monitor 1
Analog Monitor 1
+
Magnification (Pn552)
Offset Voltage (Pn550)
Analog Monitor 2 Analog Monitor 2
+
Magnification (Pn553) Offset Voltage (Pn551)
When Enabled
0 Immediately
When Enabled
0 Immediately
When Enabled
100 Immediately
When Enabled
100 Immediately
When Pn552 = 1,000 (Setting Unit: ×0.01)
Analog monitor output voltage (V)
Approx. +10 V
+8 V
+6 V
+6 00
-800 -600
-6 V
-8 V
Approx. -10 V
Note: The effective linearity range is ±8 V.
The resolution is 16 bits.
Classification
Setup
Classification
Setup
Classification
Setup
Classification
Setup
+800
Motor speed
(min -1 )
9
9-11