Basic description of PCL series
-10-
(6) Zero position search operation
50oo(except PCL5022/5023) 60oo
In this zero search, the motor rotates between the -EL sensor and +EL sensor, back and forth, and finally finds
the zero position from the specified direction. Internally, this is configured by automatically switching between
zero return operations and zero leaving operations.
(7) Other zero return operations
60oo
Other zero return operations are possible with the PCL6025/6045B: a) return to a memorized ORG signal ON
position, b) the motor decelerates, stops and then reverses when the EL signal goes ON. When the specified
number of EZ pulses is counted, the motor stops.
For the details about methods (5), (6), and (7), see the User's Manual for these operation modes.
9. Comparator
50oo(Except PCL5022/5023) 61oo 60oo
The comparator refers to a comparison circuit.
Compare the preset value (i.e. the comparator
data) with an internal counter value. When the
comparison condition is met, the LSI will output
a signal, or the PCL can take further action.
In simple terms, it lets you know when the
machine has passed a position with a signal,
which can be used to have the machine do
something else.
The details of the comparator function vary with
each model.
The PCL60oo series can store five comparator
data. The internal action that occurs when a
condition is met can be selected from various
items. The PCL3013/5014 and PCL61oo series
can store two comparator data. However, the
PLC61oo series have a simplified version of this
function.
This section discusses examples of the comparator function in the PCL3013/5014.
We’ll refer to comparator 1 data as "CMPD1," Comparator 2 data are "CMPD2," the countdown counter value
is "DC," and the up/down counter value is "UDC."
(1) What kinds of conditions can be specified?
You decide which conditions will be used for the CMPD1 (or CMPD2) and DC (or UDC), and the signal to be
output. You can select from 13 types of conditions, including those shown below.
a) When UDC is equal to CMPD1, output a signal. (CMPD1 = UDC)
b) When UDC is larger than CMPD1, output a signal. (CMPD2<UDC)
c) When DC is smaller than CMPD2, output a signal. (CMPD2>DC)
d) When UDC is larger than CMPD1, and is smaller than CMPD2, output a signal (CMPD1<UDC<CMPD2)
(2) What does it mean to put out a signal?
a) The CMP terminal goes ON (LOW) unconditionally when the comparator conditions are met.
b) An INT signal can be output. Set bit 12 in R8 (Environment register 3)
(3) What kinds of internal processing will the PCL do when the conditions are met?
The PCL3013/5014, in addition to turning ON the CMP terminal and outputting an INT signal, can do any of
the four things below.
a) Do nothing.
b) Immediately stop outputting pulses.
c) Continue the internal operation but don’t output pulses.
d) Change the FH speed or the acceleration/deceleration rate to the pre-register values.
=> Select one of the actions the above using bits 20 and 21 in R7 (Environment register 2).
<Figure 14>
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When the motor reaches a preset
position, a signal is output.
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