[Pr. Psa19_Ssm Hysteresis Width (**Ssmhw)]; [Pr. Psa20_Servo Motor Encoder Resolution (**Smer)]; [Pr. Psa22_Position Feedback Error Detection Time (**Saadt)]; [Pr. Psa23_Servo Motor Rated Speed (**Smrs)] - Mitsubishi Electric MELSERVO-J5 MR-J5-G User Manual

[Pr. PSA19_SSM hysteresis width (**SSMHW)]

Initial value
20 [r/min], [mm/s]
Set the threshold of the hysteresis width for SSM speed judgment. Ensure that the value set in this parameter is smaller than
the value set in [Pr. PSA18 SSM speed].
If this parameter is set to a value larger than the value set in [Pr. PSA18], [AL. 537 Parameter setting range error (safety sub-
function)] occurs.
If this functional safety parameter is set incorrectly, [AL. 537] occurs.
This functional safety parameter is only usable with the MR-J5-_G_-RJ.

[Pr. PSA20_Servo motor encoder resolution (**SMER)]

Initial value
67108864 [pulse/rev]
Set the encoder resolution of the servo motor. There is no need to set this functional safety parameter when using a linear
servo motor. It is necessary to set [Pr. PSL02 Functional safety - Linear encoder resolution setting - Numerator] and [Pr.
PSL03 Functional safety - Linear encoder resolution setting - Denominator], however.
If the value set in this functional safety parameter does not match the actual resolution of the connected encoder, [AL. 537
Parameter setting range error (safety sub-function)] occurs.
If this functional safety parameter is set incorrectly, [AL. 537.2] occurs.

[Pr. PSA22_Position feedback error detection time (**SAADT)]

Initial value
60 [min]
Set the time required for detection of [AL. 52A Position feedback error (safety sub-function)].
The time required to detect a position feedback diagnosis error when a standard encoder is used will be set.
Diagnosis via [AL. 52A] is not executed if this parameter is set to "0".

[Pr. PSA23_Servo motor rated speed (**SMRS)]

Initial value
3000 [r/min], [mm/s]
Set the servo motor rated speed. This functional safety parameter converts the values from [Pr. PSA24 SS1/SS2 deceleration
monitor time constant], etc. into acceleration.
Be sure to set the rated speed of the connected servo motor. If the rated speed set in this functional safety parameter does
not match the actual rated speed of the connected servo motor, [AL. 537 Parameter setting range error (safety sub-function)]
occurs.
[Pr. PSA24_SS1/SS2 deceleration monitor time constant
(**SSTC)]
Initial value
100 [ms]
Set the deceleration time constant for the SS1 function and the SS2/SOS function. The STO function activates if the speed
does not conform to the deceleration time constant set in this functional safety parameter after deceleration monitoring starts.
Setting range
0 to 10000
Setting range
0 to 4294967295
Setting range
0 to 65535
Setting range
0 to 10000
Setting range
0 to 20000
Setting method
Each axis
Setting method
Each axis
Setting method
Each axis
Setting method
Each axis
Setting method
Each axis
7 FUNCTIONAL SAFETY PARAMETER DETAILS
7.1 Safety sub-function 1 parameters group ([Pr. PSA_ _ ])
Ver.
B2
Ver.
B2
Ver.
B2
Ver.
B2
Ver.
B2
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