Siemens SINAMICS S200 - Setting Motor Overload Protection in Accordance with UL 61800-5-1 Ed.2

You can select one of the following two values to de󹪝ne the electronic gear ratio:
•
Number of PTO pulses per motor revolution (p4408).
• Gear ratio by using a numerator (p4410) and a denominator (p4409).
Note
When you use the numerator and t
he denominator to de󹪝ne the electronic gear ratio, the
number of PTO pulses per motor revolution (p4408) must be set to 0. Otherwise, no
electronic gear ratio is active.
Note
When y
ou use t
he PT
O electr
onic g
ear function, the electronic gear is based on the encoder
resolution. The encoder resolution can be read from parameter r0979[2] and the default value
is 1024 ppr.
The range of electronic gear ratio is from 0.02 to 8000.
The electronic gear ratio can be set at servo-o󹪜 state only.
Note
When you use the PTO electronic g
ear function, if the product of the PTO setpoint pulses per
motor revolution multiplied by the electronic gear ratio is not an integer, there is no zero mark
generated.
Parameters
The following list includes the par
ameters of the "PTO" function.
Number Name Unit
p4405 PTO maximum output frequency [kHz]
p4408 PTO pulse number 
p4409 Gearbox encoder (motor)/PTO denominator (Control Unit) 
p4410 Gearbox encoder (motor)/PTO numerator (Control Unit) 
r4419 PTO diagnostics position setpoint 
c4420 PTO position setpoint 
p4422.0 PTO con󹪝gur
ation 
p4426 PTO zero mark
o󹪜set 
9.4.6 Setting mot
or overload protection in accordance with UL 61800-5-1 Ed.2
Overview
The mo
tor overload protection function works without temperature sensors in the 1FL2 motors.
To comply with UL61800‑5‑1 Ed.2, you must make some additional settings when operating
the converter with a 1FL2 motor.
Functions
9.4General functions
SINAMICS S200 pulse train servo drive system with SIMOTICS S-1FL2
242 Operating Instructions, 11/2023, FW V6.3, A5E51646767B AA