P143 Setting The Maximum Speed For Pulse Encoder Operation; P144 Multiple Evaluation Of Encoder Signals; P145 Automatic Measuring Range Switchover For Measurement Of Low Speeds - Switchover Of Multiple Evaluation; P146 Automatic Measuring Range Switchover For Measurement Of Low Speeds - Switchover Of Measuring Time - Siemens 6RA70 Series Instructions Manual

PNU Description
P143 Setting the maximum speed for pulse encoder operation
FDS
The speed set in this parameter corresponds to an actual speed (K0040) of
(G145)
100%.
Control parameters for speed sensing with pulse encoder P144 to P147:
P144 and P147 determine the basic setting for actual speed sensing by means of pulse encoder (single or multiple evaluation of pulse
encoder signals and nominal measuring time) and thus also define the lowest possible measurable speed (minimum speed).
P145 and P146 can be used in special cases to extend the measurable speed range down to even lower speeds, on the basis of the
minimum speed defined by the settings in P144 and P147.
P144 Multiple evaluation of encoder signals
*
0 1x evaluation of pulse encoder signals
FDS
1 2x evaluation of pulse encoder signals (for encoder types 1, 1a, 2)
2 4x evaluation of pulse encoder signals (for encoder types 1, 1a)
(G145)
Note:
In contrast to the 1x evaluation method, 2x or 4x evaluation reduces the
minimum measurable speed by a factor of 2 or 4 respectively, but may
produce an "unsteady" actual speed value on encoders with unequal
pulse/pause ratio or without an exact 90° displacement between encoder
signals.
P145 Automatic measuring range switchover for measurement of low
* speeds - switchover of multiple evaluation
FDS
0 Automatic switchover of multiple evaluation of pulse encoder
signals OFF (i.e. P144 is always active)
(G145)
1 Automatic switchover of multiple evaluation of pulse encoder
signals ON (i.e. when P144 = 0, 2x evaluation is selected for low
speeds and 4x evaluation for very low speeds. When P144 = 1,
4x evaluation is selected for low speeds)
As opposed to P145 = 0, this setting reduces the minimum
measurable speed by up to a factor of 4.
Caution:
Switching over the multiple evaluation method for encoder pulses also
affects the position sensing function in the measuring channel. For this
reason, this setting may not be used in conjunction with positioning
operations. Connectors K0042 to K0044 are inoperative when P145 = 1.
P146 Automatic measuring range switchover for measurement of low
* speeds - switchover of measuring time
FDS
0 Automatic switchover of measuring time OFF
(i.e. P147 is always active)
(G145)
1 Automatic switchover of measuring time ON
This setting extends the measuring time for low speeds (based
on the measuring time set in P147, i.e. when P147 = 0, the
nominal measuring time is switched over to 2 ms for low speeds
and to 4 ms for very low speeds. When P147 = 1, the nominal
measuring time is switched over to 4 ms for low speeds)
Caution:
When P146=1, the minimum measurable speed can be reduced by up to a
factor of 4 as opposed to a 0 setting. However, this setting results in a
longer actual speed sensing delay in the extended minimum speed range.
SIEMENS Energy & Automation
SIMOREG DC Master Base Drive Panel Operating Instructions
Value range No. indices
[Unit] Factory
Steps setting
Type
1.0 to 6500.0 Ind: 4
[rev/min] FS=500.0
0.1rev/min Type: O4
0 to 2 Ind: 4
1 FS=2
Type: O2
0 to 1 Ind: 4
1 FS=0
Type: O2
0 to 1 Ind: 4
1 FS=0
Type: O2
See
Change
(Access /
Status)
P052 = 3
P051 = 40
Online
P052 = 3
P051 = 40
Offline
P052 = 3
P051 = 40
Offline
P052 = 3
P051 = 40
Offline
10-29