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