Siemens 440 operating instructions Encoder

Issue 10/06 6 Commissioning

6.4.15Encoder

P0400 =...

P0408 =...

P0491 =...

P0492 =...

P0494 =...

Select encoder type		0	The table shows the values of P0400 as a function of the
Selects the encoder type.			number of tracks:
0	Inhibited
			Parameter	Terminal	Track	Encoder output
1	Single-track pulse encoder
2	Two-track pulse encoder		P0400 = 1	A		single ended
For hoisting gear applications
				A		differential
(4-quadrant operation!), a
				AN
2-track encoder must be used.
			P0400 = 2	A		single ended
				B
				A		differential
				AN
				B
				BN

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		Output
			single ended		differential
	TTL	(e.g.	111111		010101
		1XP8001-2)
	HTL (e.g.		101010		000000
		1XP8001-1)
Encoder pulses per revolution						1024
Specifies the number of encoder pulses per revolution.
Reaction on speed signal loss						0
Defines the calculation method.
0		No transition
1		Transition into SLVC
Allowed speed difference						10.00 Hz

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.

Delay speed loss reaction 10 ms

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).

MICROMASTER 440	47
Operating Instructions (Compact)