MX2 Quick Start Guide 29
PROGRAMMING MX2
3.14 Pulse input
Pulse train input in terminal EA could be used as frequency refer-
ence, PID input, encoder feedback for position control and also as
an input for Drive Programming. The maximum frequency for this
pulse input is 32KHz and the selection is done by parameter P003.
Encoder feedback setting is set in parameter P004, but please
remember that this is just for positioning function and close loop
vector control can’t be performed with MX2 because this encoder
reading is not included into the speed loop. For selection “01” and
“02” on P004 is possible to use a 2-phase differential encoder but
the second channel should be connect to multi-funciton input 7
with the function code “EB”.
.
The pulse input when used as frequency reference could be adjusted with parameters P055 to P058 according to this diagram
Parameter Parameter name Description
P003 [EA] terminal selection 00… Speed reference (incl. PID)
01… For control with encoder feedback
02… Extended terminal for EzSQ
P004 Pulse train input mode selection for
feedback
Four option codes:
00…Single-phase pulse [EA]
01…2-phase pulse (90° difference) 1 ([EA] and [EB])
02…2-phase pulse (90° difference) 2 ([EA] and [EB])
03…Single-phase pulse [EA] and direction signal [EB]
P011 Encoder pulse setting Sets the pulse number (ppr) of the encoder,
set range is 32~1024 pulses
P055 Pulse train input frequency scale set-
ting
Sets the pulse numbers at max. frequency,
set range is 1.0~32.0 kHz
P056 Pulse train input frequency filter
time constant setting
Set range is 0.01~2.00 sec.
P057 Pulse train input bias setting Set range is -100~100 %
P058 Limitation of the pulse train input
setting
Set range is 0~100 %
P24
EA
7/EB
PLC
L
Encoder
Vcc
GND
A
B
MX2
PNP open collector type or
voltage output type encoder
Frequency
measurement
/
1
1 + sT
Limit
(P058)
Bias(P057)
X
Frequency
Reference
Frequency Scale (P055)
(1.0 to 32 kHz)
Maximum Frequency
(A004)
Primary Delay Filter (P056)
I129E-EN-02+MX2+QuickStartGuide.book Seite 29 Mittwoch, 7. November 2012 1:54 13
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