Siemens MICROMASTER 440 - Manual (Page 47)

Issue 10/06 6 Commissioning
MICROMASTER 440
Operating Instructions (Compact)
47
6.4.15 Encoder
Select encoder type
Selects the encoder type.
0 Inhibited
1 Single-track pulse encoder
2 Two-track pulse encoder
For hoisting gear applications
(4-quadrant operation!), a
2-track encoder must be used.
The table shows the values of P0400 as a function of the
number of tracks:
Parameter Terminal Track Encoder output
single ended P0400 = 1 A
differential A
AN
A
B
A
AN
B
BN
differential
P0400 = 2 single ended
In order to guarantee reliable operation, the DIP switches on the encoder module must be
set as follows depending on the encoder type (TTL, HTL) and encoder output:
Type
differential
TTL
HTL
111111 010101
101010 000000
single ended
Output
(e.g.
(e.g.
1XP8001-1)
1XP8001-2)
Encoder pulses per revolution
Specifies the number of encoder pulses per revolution.
Reaction on speed signal loss
Defines the calculation method.
0 No transition
1 Transition into SLVC
Allowed speed difference
Parameter P0492 defines the frequency threshold for the loss of the encoder signal
(fault F0090).
CAUTION
p0492 = 0 (no monitoring function):
With p0492 = 0, the loss of the encoder signal at high frequency as well as at a low
frequency is de-activated. As a result, the system does not monitor for the loss of the
encoder signal.
P0494 =... Delay speed loss reaction
P0492 is used to detect the loss of the encoder signal at low frequencies. If the motor
speed is less than the value of P0492, the loss of the encoder signal is determined using an
appropriate algorithm. P0494 defines the delay time between detecting the loss of the
speed signal and initiating the appropriate response.
CAUTION
p0494 = 0 (no monitoring function):
With p0494 = 0, the loss of the encoder signal at low frequencies is de-activated. As a
result, at these frequencies, a loss of the encoder signal is not detected (loss of the
encoder signal at high frequency remains active as long as parameter p0492 > 0).
1024
0
10.00 Hz
10 ms
P0408 =...
P0491 =...
P0492 =...
0
P0400 =...