4-90
D
Limiting the Speed with Analog Voltage
•
When Pn002.1 (speed command input switching) is set to 1, REF (speed command input) becomes
the analog speed limit input terminal, so you can limit the speed on multiple levels. The speed limit
value can be calculated from the following equation:
•
Absolute REF voltage (V) / Pn300 (speed command scale) x 100 x rated rotation speed (r/min.)
•
Regardless of whether the voltage is positive or negative, both forward and reverse directions have
the same limits (taken as absolute values).
Parameter No.
Parameter name
Explanation
Reference
Pn002.1
Function selection
switch 2
Speed command
input switching
Set Pn002.1 to 1 (i.e., use REF as the analog
speed limit input).
4-4-4 Parameter
Details
Pn300
Speed command
scale
Set the REF voltage for the rated rotation speed.
(See note.)
Note
The default setting is 1000 (x 0.01 V / No. or rated rotations).
4-6
Trial Operation Procedure
When you have finished installation, wiring, verifying Servomotor and Servo Driver op-
erations (i.e., jog operation), and setting the user parameters, perform a trial operation.
The main purpose of a trial operation is to confirm that the servo system is operating
correctly electrically. Make sure that the host controller and all the programming devices
are connected, then turn ON the power. First perform a trial operation at low speed to
confirm that the system is operating correctly. Next, perform a normal run pattern to con-
firm that the system is operating correctly.
Note 1.
If an error occurs during the trial operation, refer to
Troubleshooting
to eliminate the cause.
Then check for safety and reset the alarm, and then retry the trial operation.
Note 2.
If the system vibrates due to insufficient gain adjustment, making it difficult to check the opera-
tion, refer to
4-7 Making Adjustments
, and adjust the gain.
H
Preparation for Trial Operation
Turn OFF the Power
Some parameters are enabled by turning OFF the Unit, then turning it ON again. Consequently, first turn
OFF the power to the control circuits and main circuits.
Mechanical System Connection
Firmly connect the Servomotor shaft and the load (i.e., the mechanical system). Tighten screws to make
sure they are not loose.
Absolute Encoder Setup ABS
If using Servomotor with an absolute encoder, refer to
4-2-2 Absolute Encoder Setup and Battery Chan-
ges
for the setup procedure. After performing a jog operation, the amount of multi-turn rotation may be
too large, so when connecting the absolute encoder to the mechanical system, be sure to set the rota-
tion speed to zero.
Operation
Chapter 4
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