326
FX
3U
/FX
3UC
Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
13 High Speed Processing – FNC 50 to FNC 59
13.3 FNC 52 – MTR / Input Matrix
13.3.1
The method and cautions for MTR instruction
1. Command input
1) Setting the command input to normally ON
For MTR instruction, set the command input to normally ON.
2. Input numbers used in MTR instruction
1) Inputs available in MTR instruction
Use the inputs X020 and later under normal conditions.
2) When using the inputs X000 to X017
The receiving speed is higher. Because the output transistor recovery time is long and the input
sensitivity is high, however, erroneous inputs may occur.
To prevent erroneous inputs, connect pull-up resistors (3.3 k
Ω
/0.5 W) to transistor outputs used in MTR
instruction.
For pull-up resistors, use the power supply shown in the table below.
The figure below shows an example of the FX
3UC
-32MT-LT (sink input/sink output).
3. ON/OFF duration of input signals
Because input of 64 points (8 rows
×
8 columns) is received in a cycle of 80 or 160 ms, the ON/OFF duration
of each input signal should be equivalent to or more than the value shown below:
*1.
X000 to X007 in the FX
3U
-16M
*2.
X010 or later in the FX
3U
-16M
Power supply used for pull-up resistors
AC power type PLC
Service power supply
DC power type PLC
Power supply for driving PLC
M
{{
(normally ON)
FNC 52
MTR
X020
Y040
M 0
K 8
COM1 Y010 Y011 Y012 Y013 Y014 Y015 Y016 Y017
COM X000 X001 X002 X003 X004 X005 X006 X007
Matrix
circuit
3.3k
Ω
/0.5W
FX
3UC
-32MT-LT
Transistor output
Pull-up resistor
Refer to the
previous page.
+
−
DC24V
80ms
80ms
When the inputs X000 to
X017
*1
are used
160ms
160ms
When the inputs X020
*2
or
later are used
Содержание FX3U Series
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