Safe Position Monitor With Delay Function (Spm-D Function); Basic Operation - YASKAWA E-V Series User Manual

6.5

Safe Position Monitor with Delay Function (SPM-D Function)

6.5.1 Basic Operation

The Safe Position Monitor with Delay Function (hereafter called the SPM-D function) operates based on the
Safe Stop 2 (SS2) function that is defined in IEC 61800-5-2. This function monitors the deceleration operation
(deceleration monitoring) of the motor according to the safety request input state until the time period speci-
fied in the parameter elapses, and then switches to position monitoring and monitors the distance that the
motor moved to make sure it is within the allowable range.
The safe state resulting from use of the SPM-D function indicates the state during position monitoring.
The HWBB function of the SERVOPACK is executed when the specified speed is exceeded during decelera-
tion monitoring or when the distance that the motor moved exceeds the allowable range during position moni-
toring. In either case, the power supply to the motor is shut OFF. If so, the safe state resulting from use of the
SPM-D function indicates the state during the power supply to the motor has been shut OFF.
 Operation during Deceleration Monitoring
The operation when the motor speed exceeds the monitoring speed during deceleration monitoring is the same
as the operation during speed monitoring of the SBB-D function. For details, refer to
Deceleration Monitoring in 6.4.1.
 Operation during Position Monitoring
• Alarms
When the motor position exceeds the distance for monitoring specified in the parameters during position mon-
itoring, the following alarms occur. When an alarm is detected, position monitoring is ended, following which
the HWBB function of the SERVOPACK is executed and the power supply to the motor is shut OFF. Because
these alarms are not an indication of any malfunction in the Safety Module, the External Device Monitor Out-
put Signal will be ON.
Alarm
No.
Safety Module: 
A.EB7 Safety Function A
Monitoring Alarm
Safety Module: 
A.EB8 Safety Function B
Monitoring Alarm
Operation Timing
Safety request
ON
input state
Motor speed
0
SPM-D function
operation state
SERVOPACK state
Name
The motor speed has exceeded the
monitoring speed specified for Safety
Function A.
Alternatively, the distance that the
motor moved has exceeded the allow-
able distance for monitoring that was
specified for Safety Function A.
The motor speed has exceeded the
monitoring speed specified for Safety
Function B.
Alternatively, the distance that the
motor moved has exceeded the allow-
able distance for monitoring that was
specified for Safety Function B.

6.5 Safe Position Monitor with Delay Function (SPM-D Function)

OFF (Safety Function
Execution Request)
Monitored speed
Distance for monitoring
Set time
Position
Deceleration
monitoring
monitoring
Operating
Alarm
Description
Reset
Available
Available
ON

Operation during
Stopping Method
According to the setting of
Pn001.0
According to the setting of
Pn001.0
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