Mitsubishi Electric MELSEC iQ-F FX5 Programming Manual page 628

• The MTR instruction can only be used once in a program.
• One diode of 0.1 A/50 V is required for each switch.
• Use the transistor output format.
• If write during RUN is executed while the MTR instruction is being executed, the control right is released by the END
processing. The MTR instruction executed first in the next scan will acquire the control right next.
• For the MTR instruction, set the command input to normally Open.
M
(normally Open)
MTR
• Inputs available in MTR instruction , use inputs X20 and later under normal conditions.
• When using the inputs X0 to X17,the receiving speed is higher. Because the output transistor recovery time is long and the
input sensitivity is high, however, erroneous input pulses may be counted. Change the input response time of unit
parameter setting to "5 ms" to input at intervals of 10 ms. To prevent erroneous input pulses, connect pull-up resistors (3.3
kΩ/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 FX5U-64MT/ES (sink input/sink output).
AC power type CPU module.
S/S
24V
COM4 Y20
3.3k /0.5W
Pull-up resistor
• Because 64 input points (8 rows × 8 columns) are received in a cycle of 80 or 160 ms, the ON/OFF duration of each input
signal should be greater than or equal to the value shown below:
When inputs X0 to
X17 are used
80 ms 80 ms
Operation error
Error code Description
(SD0/SD8067)
3405H The value specified by (n) is outside the following range.
2 to 8
2820H The device range specified by (s) exceeds the corresponding device range.
The device range specified by (d1) exceeds the corresponding device range.
The device range specified by (d2) exceeds the corresponding device range.
1811H The number of times the MTR instruction is simultaneously driven exceeds 1.
3582H The MTR instruction is used in the interrupt program.
8 APPLICATION INSTRUCTION
626
8.18 Input Matrix Instruction
X20 Y40
Power supply used for pull-up resistors transistor output
Service power supply
0V X0 X1 X2 X3
FX5U-64MT/ES
Y21 Y22 Y23
When inputs X20 or
later are used
160 ms
M0 K8
Matrix
circuit
X4 X5 X6 X7
Transistor output
Y24 Y25 Y26 Y27
160 ms
Refer to the
previous page.