Yaskawa Sigma II Series Servo System - Manual (Page 157)

Sigma II User’s Manual Chapter 5: Parameter Settings and Functions
5-71
5.5 Forming a Protective Sequence
This section describes the procedure for using I/O signals from the servo amplifier to form
a protective safety sequence.
5.5.1 Using Servo Alarm and Alarm Code Outputs
The basic procedure for connecting alarm output signals is described below.
A suitable external I/O power supply must be provided by the user separately
because there is no internal 24V power supply in the servo amplifier.
The use of the photocoupler output signals is described below.
These alarms are output when a servo amplifier alarm is detected.
Form an external circuit so this alarm output (ALM) turns OFF the servo amplifier.
Output ALM+ CN1-31 Servo Alarm Output
Speed/Torque Control,
Position Control
Output ALM- CN1-32 Signal Ground for Servo Alarm Output
Speed/Torque Control,
Position Control
State Status Result
ON
Circuit between CN1-31 and 32 is closed, and
CN1-31 is at low level.
Normal state.
OFF
Circuit between CN1-31 and 32 is open, and
CN1-31 is at high level.
Alarm state.
Photocoupler output levels per output node:
• Maximum operating voltage: 30V
DC
• Maximum output current: 50mA
DC
Open collector output levels per output node:
• Maximum operating voltage: 30V
DC
• Maximum output current: 20mA
DC
AL01
ALM-
AL02
AL03
ALM+
SG
Host controller
Servo amplifier
Photocoupler CN1-31
CN1-32
CN1-37
CN1-38
CN1-39
CN1-1
0V 0V
50mA
(maximum)
20mA
(maximum)
I/O power supply
+24V 0V
Turns power OFF.
Alarm
detection
Servo amplifier
ALM output