Manual – IPOSplus®
135
12
P94x IPOSplus
®
encoder
P9xx IPOS Parameters
12.5.4 P944 Encoder scaling ext. encoder
Setting range: x1 / x2 / x4 / x8 / x16 / x32 / x64
Before
setting P944, make sure that P942 and P943 are set to "1".
The significance of the travel resolution of the motor encoder and external encoder is
adapted. The parameter is set so the travel information ratio between the motor encoder
and the external encoder is as close to "1" as possible. First set the parameter to "x1".
To do this, note the values in variables H510 and H511.
• Move the drive by about 1000 increments (H511).
• Calculate the difference between the values you wrote down and the current values:
– H510 new – H510 old = H510 difference
– H511 new – H511 old = H511 difference
• Calculate the quotient from H511 difference divided by H510 difference. Set the
parameter P944 Encoder scaling ext. to the value that is closest to the calculated
quotient.
.
Important
: The encoder scaling directly affects the parameters P900 reference offset
(page 123), P942 encoder factor numerator (page 134) and P943 encoder factor de-
nominator (page 134) as well as the parameter group P92x IPOS monitoring. All posi-
tions of the IPOS
plus®
program have to be adjusted when using the external encoder.
The setting of all listed parameters has to be adjusted every time the encoder scaling is
changed.
The number of pulses detected at X14 is multiplied by P944 and then mapped to H510.
The external encoder must always provide fewer pulses than the motor encoder. If this
is not possible, contact SEW-EURODRIVE.
12.5.5 P945 Synchronous encoder type (X14)
Setting range: TTL / SIN/COS / HIPERFACE
Enter the used encoder type here. Possible encoder types are:
• TTL: Encoder with digital, rectangular output signal (TTL level 0 V, 5 V, with negated
tracks, encoder with signal level according to RS422
• SIN/COS: Encoder with analog, sine-shaped output signal (1 V
SS
)
• HIPERFACE
®
: Encoder with designation AV1H, AS1H, ES1H, EV1H
SEW encoder type
Startup parameters encoder type / encoder PPR count
ES1S / ES2S / EV1S / EH1S
SINE ENCODER / 1024
AV1Y
SINE ENCODER / 512
ES1R / ES2R / EV1R / EH1R
INCREM. ENCODER TTL / 1024
ES1T
1)
/EH1T
1) via DWI11A only
INCREM. ENCODER TTL / 1024
AV1H / AS1H / ES1H / EV1H
HIPERFACE
®
P
i
f
kVA
Hz
n