Siemens SINAMICS S120 Function Manual page 240

Basic functions
6.18 Terminal Module 41 (TM41)
control without PROFIBUS and to assign the speed setpoint to the drive via the analog
output of the control and the analog input of the TM41 (see example TM41). The number of
encoder pulses per revolution (p0408) and the fine interpolation (p0418) must be set the
same as the drive.
The runtime of the encoder position actual value up to the pulse encoder emulation can be
compensated using the deadtime compensation with p4421. If p4422 = 1, input signal p4420
is inverted.
The sampling time for encoder emulation (p4099[3]) is automatically adjusted to the
application cycle of the connected encoder (connector input p4420) if the factory setting of
p4099[3] does not match the application cycle. The adjustment is made after initial POWER
ON and following the logical application (connector input p4420) of the encoder. The fault
message F35228 indicates that the value p4099[3] has been changed.
The message can be acknowledged immediately. The new sampling time is active after
saving (RAM to ROM) and a POWER ON.
Hardware requirements:
● The TM41 shall operate on a DRIVE-CLiQ line that is separated from the Motor Modules.
● If multiple TM41s operate on the same DRIVE-CLiQ line, the sampling times p4099[3]
Encoder emulation on TM41 modules
Old module: Order no. 6SL3055-0AA00-3PA0
New module: Order number 6SL3055-0AA00-3PA1
● Settable pulse number (p0408)
● Max. pulse frequency (limit frequency for TM41:
SINAMICS mode (p4400=1):
The fine resolution setting for the TM41 (p0418) must always match the corresponding
setting for the emulated encoder.
Fine resolution (p0418) < 17 bits:
Minimum and maximum pulse frequencies for TM41 with a fine resolution of < 17 bits
Old/new module
Old module
New module
240
The communication cycle of the DRIVE-CLiQ line must match the application cycle of the
associated encoder.
must be identical for all TM41s. In this case, the emulated encoders must have the same
application cycle.
old module: 1000 to 8192 pulses/revolution
New module: 1000 to 16384 pulses/revolution
– The limit frequency specified in the tables below must not be exceeded.
– If the specified limit frequencies are exceeded, the internal position controller for
encoder emulation reaches the control limit and a following error can no longer be
corrected.
p4099[3]
fmin [Hz]
fmax [kHz]
fmax [kHz]
125 µs 250 µs
31,25 15,625
256 256
512 512
Function Manual, (FH1), 10/2008, 6SL3097-2AB00-0BP5
500 µs
7,8125
256
256
Drive functions