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Timing for Fetching from an External Digital Switch
PARA
No.
18
is used to designate the home position return direction. This is also used for selecting
the timing for fetching the signals from an external digital switch. Either timing of 8 msec/digit or 64
msec/digit can be selected
by
using an F2-30TP (version V1.3 or after).
Setting
' 0 '
Current
address
increases.
8 mseddigit
Setting
' 1 '
Current address decreases.
Setting '2'
Current
address
increases.
64
rnsecldigit
Setting
'3'
Current address decreases.
The following shows the external digital switch input timing when the PARA
No. 14 (block
designation) setting is "2";
-
a m s * I
PGU Y4 (1st digit)
PGU Y5 (2nd digit)
t
4
PGU X0 to X3 (data
input)
1st digit data
2nd
digit data
*1:
8 msec when
PARA No. 18
is
'0' or
'l',
and 64 msec when it is '2' or
'3',
' 2 : input filter timing
The same timing is used for data fetching from
an external digital switch when an SPD, EXT,
or
RPT instruction is used.
Usually a timing of
8
msec/digit is selected for fetching data from an external digital switch.
When output data of a programmable controller other than the FX series is fetched through the input
channels of the PGU, as shown below, and if the response of the programmable controller is slow,
select
64
msec/digit to improve the timing of the I/O operations between the two.
When X10 is ON, the 1st digit of data is output
to Y10 to Y13.
When
X1 1
is ON, the 2nd digit of data is output
to
vi0
to Y13.
After X10 or X1 1 is turned ON, data has to be
output within 61 msec (64 msec
-
input filter 3
msec).
(a)
-
136
-
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